Cisco ERouting Routing Protocols Final V40

1. Refer to the exhibit. How many routes are child routes? 1 3 4 6 2. A router has EIGRP configured as the only routing protocol. In what way might EIGRP respond if there is no feasible successor route to a destination network and the successor route fails? It broadcasts hello packets to all routers in the network to re-establish neighbor adjacencies. It sends queries to adjacent neighbors until a new successor route is found. It immediately sends its entire routing table to its neighbors. It will set the metric for the failed route to infinity.

3. Refer to the exhibit. The show cdp neighbors command was run at R1. Which two facts about the newly detected device can be determined from the output? (Choose two.) ABCD is a router that is connected to R1. ABCD is a non-CISCO device that is connected to R1. The device is connected at the Serial0/0/1 interface of R1. R1 is connected at the S0/0/1 interface of device ABCD. ABCD does not support switching capability.

4. Refer to the exhibit. The routers are properly configured using a dynamic routing protocol with default settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path? If the network uses the RIP protocol, router A will determine that all paths have equal cost. If the network uses the RIP protocol, router A will update only the A-C-E path in its routing table. If the network uses the EIGRP routing protocol, router A will determine that path A-D-E has the lowest cost. If both RIP and EIGRP protocols are configured on router A, the router will use the route information that is learned by the RIP routing protocol. 5. What are two tasks that must be completed before two routers can use OSPF to form a neighbor adjacency? (Choose two.) The routers must elect a designated router. The routers must agree on the network type. The routers must use the same dead interval. The routers must exchange link state requests. The routers must exchange database description packets. 6. Which two statements are true about the startup configuration in a router? (Choose two.) The router uses the startup configuration file to start POST. If the Cisco IOS cannot be found, the router enters setup mode. The bootstrap program searches for the startup configuration file in NVRAM. If the startup config file cannot be found, the router enters ROMMON mode. The router searches for a TFTP server if the startup configuration file is absent at the default location.

7. Refer to the exhibit. A network administrator successfully pings R1 from R3. Next, the administrator runs the show cdp neighbors command on R3. The output of this command is displayed. What are two reasons for the absence of R1 in the output? (Choose two.) There is a Layer 2 connectivity problem between R1 and R3. The Fa0/0 interface of R1 is configured with an incorrect IP address. The no cdp run command has been run at R1. The no cdp enable command has been run at Fa0/1 interface of R3. R1 is powered off.

8. Refer to the exhibit. A ping between host A and host B is successful, but pings from host A to operational hosts on the Internet fail. What is the reason for this problem? The FastEthernet interface of R1 is disabled. One of the default routes is configured incorrectly. A routing protocol is not configured on both routers. The default gateway has not been configured on host A.

9. Refer to the exhibit. R1 knows two routes, Path A and Path B, to the Ethernet network attached to R3. R1 learned Path A to network 10.2.0.0/16 from a static route and Path B to network 10.2.0.0/16 from EIGRP. Which route will R1 install in its routing table? Both routes are installed and load balancing occurs across both paths. The route via Path B is installed because the EIGRP route has the best metric to network 10.2.0.0/16. The route via Path A is installed because the static route has the best metric to network 10.2.0.0/16. The route via Path B is installed because the EIGRP route has the lowest administrative distance to network 10.2.0.0/16. The route via Path A is installed because the static route has the lowest administrative distance to network 10.2.0.0/16.

10. Refer to the exhibit. All interfaces are configured with the correct IP addresses and subnet masks. OSPF has been configured as the routing protocol. During troubleshooting, it is determined that hosts on network B can ping the Lo0 interface on R1 but are unable to reach hosts on network A. What is the cause of the problem? Routers R1 and R2 have incorrect router IDs configured. Router R1 is unable to form a neighbor relationship with router R2. Routers R1 and R2 have been configured in different OSPF areas. The configuration of router R1 fails to include network A in the OSPF routing process.

11. Refer to the exhibit. All routers are running the same routing protocol. Based on the exhibit and its displayed commands, which statement is true? The wildcard mask is incorrectly configured. A default route must be configured on every router. Routers B, C, and D have no access to the Internet. The link to the ISP is not advertised by the routing protocol process.

12. Refer to the exhibit. A network administrator has configured R1 as shown, and all interfaces are functioning correctly. A ping from R1 to 172.16.1.1 fails. What could be the cause of this problem? The serial interface on R1 is configured incorrectly. The default route is configured incorrectly. The default-information originate command must be issued on R1. Autosummarization must be disabled on R1.

13. Refer to the exhibit. The output of the show ip route command for router R1 is displayed. What action will the router take for a packet that is destined for 192.168.1.5? It will drop the packet. It will forward the packet to interface Serial0/0/0. It will determine the route for the packet through a routing protocol. It will forward the packet to the default gateway.

14. Refer to the exhibit. Although both the routers can ping the serial interface of their neighbors, they are unable to ping the Ethernet interfaces of other routers. Which two statements are true for this network? (Choose two.) The administrative distance has been set to 50 on both routers. R2 is learning about network 192.168.1.0. R1 is learning about network 192.168.2.0. The network 10.1.1.0 command has not been run on both routers. Autosummarization is enabled on both routers.

15. What are two functions of a router? (Choose two.) It connects multiple IP networks. It controls the flow of data via the use of Layer 2 addresses. It determines the best path to send packets. It manages the VLAN database. It increases the size of the broadcast domain.

16. The network shown in the diagram is having problems routing traffic. It is suspected that the problem is with the addressing scheme. What is the problem with the addressing used in the topology? The address assigned to the Ethernet0 interface of Router1 is a broadcast address for that subnetwork. The subnetwork configured on the serial link between Router1 and Router2 overlaps with the subnetwork assigned to Ethernet0 of Router3. The subnetwork assigned to the Serial0 interface of Router1 is on a different subnetwork from the address for Serial0 of Router2. The subnetwork assigned to Ethernet0 of Router2 overlaps with the subnetwork assigned to Ethernet0 of Router3.

17. Refer to the exhibit. Which router is advertising subnet 172.16.1.32/28? Router1 Router2 Router3 Router4

18. Refer to the exhibit. All router interfaces are configured with an IP address and are operational. If no routing protocols or static routes are configured, what information will be included in the show ip route command output for router A? All of the 192.168.x.0 networks will be in the routing table. Routes to networks 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24 will be in the routing table. The routing table will be empty because routes and dynamic routes have not been configured. A default route is automatically installed in the routing table to allow connectivity between the networks.

19. Refer to the exhibit. All routes are advertised and fully operational on all routers. Which statement is true about the path that the data will take from router A to router B? If EIGRP is used with default configurations, the data will be equally distributed between two paths — A, D, B and A, C, B. If RIPv1 is used with default configurations, the data will be load-balanced on all paths. If EIGRP and OSPF are both used with default configurations, the data will be sent through paths learned by the OSPF protocol. If RIPv2 is used with default configurations, the data will be equally distributed between two paths — A, D, B and A, C, D.

20. Refer to the exhibit. Two routers are unable to establish an adjacency. What is the possible cause for this? The two routers are connected on a multiaccess network. The hello and dead intervals are different on the two routers. They have different OSPF router IDs. They have different process IDs. 21. What is the first step OSPF and IS-IS routers take in building a shortest path first database? Learn about directly connected networks Send hello to discover neighbors and form adjacencies Choose successors and feasible successors to populate the topology table Flood LSPs to all neighbors informing them of all known networks and their link states 22. What should be considered when troubleshooting a problem with the establishment of neighbor relationships between OSPF routers? (Choose two.) OSPF interval timers mismatch Administrative distance mismatch Interface network type mismatch No loopback interface configured Gateway of last resort not redistributed 23. What are three features of CDP? (Choose three.) Tests Layer 2 connectivity Provides a layer of security Operates a OSI layers 2 and 3 Enabled by default on each interface Used for debugging Layer 4 connectivity issues Provides information on directly connected devices that have CDP enabled

24. Refer to the exhibit. What will happen if interface Serial0/0/1 goes down on Router1? The Dijkstra algorithm will calculate the feasible successor. DUAL will query neighbors for a route to network 192.168.1.0. Neighbor 172.16.3.2 will be promoted to the feasible successor. Traffic destined to the 192.168.1.0 network will be dropped immediately due to lack of a feasible successor.

25. Refer to the exhibit. An administrator is adding a new subnet of 50 hosts to R3. Which subnet address should be used for the new subnet that provides enough addresses while wasting a minimum of addresses? 192.168.1.0/24 192.168.1.48 /28 192.168.1.32/27 192.168.1.64/26 26. What is the function of the OSPF LSR packet? It is used to confirm the receipt of LSUs. It is used to establish and maintain adjacency with other OSPF routers. It is used by the receiving routers to request more information about any entry in the DBD. It is used to check the database synchronization between routers.

27. Refer to the exhibit. The network administrator is testing network connectivity by issuing the tracert command from Host A to Host B. Given the exhibited output on Host A, what are two possible routing table issues on the network? (Choose two.) Router1 is missing a route to the 172.16.0.0 network Router1 is missing a route to the 192.168.1.0 network Router2 is missing a route to the 10.0.0.0 network Router2 is missing a route to the 172.16.0.0 network Router3 is missing a route to the 10.0.0.0 network Router3 is missing a route to the 192.168.0.0 network

28. Refer to the exhibit. What action will R2 take for a packet that is destined for 192.168.2.0? It will drop the packet. It will forward the packet via the S0/0/0 interface. It will forward the packet via the Fa0/0 interface. It will forward the packet to R1.

29. Refer to the exhibit. To implement the RIPv2 protocol, the network administrator runs the commands as displayed. However, the show ip protocol command fails to display any output. How can the administrator solve the problem that is indicated by the lack of output from this command? Include the default-information originate command. Include the no auto-summary command. Specify the network for which RIP routing has to be enabled. Implement RIPv2 authentication in the network. 30. What are two reasons for the occurrence of a routing loop? (Choose two.) Slow convergence Incorrectly configured static routes Routes that are learned via two routing protocols Static and dynamic routing being used on the same router Lack of a default route on the router that connects to the Internet

31. Refer to the exhibit. The network administrator issues the command no ip classless on Router1. What forwarding action will take place on a packet that is received by Router1 and is destined for host 192.168.0.26? The packet will be dropped. The packet will be forwarded to the gateway of last resort. The packet will match the 192.168.0.0 network and be forwarded out Serial 0/0. The packet will most closely match the 192.168.0.8 subnet and be forwarded out Serial 0/1.

32. Refer to the exhibit. Both routers are using the RIP protocol. Devices on the 192.168.1.1 network can ping the S0/0/0 interface on R2 but cannot ping devices on the 192.168.2.1 network. What is a possible cause of this problem? The routers are configured with different versions of RIP. R2 is not forwarding the routing updates. The R1 configuration should include the no auto-summary command. The maximum path number has been exceeded. 33. Which two statements are true regarding link-state routing protocols? (Choose two.) They are aware of the complete network topology. They offer rapid convergence times in large networks. They do not include subnet masks in their routing updates. They rely on decreasing hop counts to determine the best path. They do not work well in networks that require special hierarchical designs. They pass their entire routing tables to their directly connected neighbors only.

34. Refer to the exhibit. All routers are running RIPv1. The two networks 10.1.1.0/29 and 10.1.1.16/29 are unable to access each other. What can be the cause of this problem? Because RIPv1 is a classless protocol, it does not support this access. RIPv1 does not support discontinuous networks. RIPv1 does not support load balancing. RIPv1 does not support automatic summarization.

35. Refer to the exhibit. R2 is configured correctly. The network administrator has configured R1as shown. Which two facts are true about the forwarding of route information by R1? (Choose two.) R1 will forward the route information for subnet 192.168.100.0/30. R1 will not forward route information for subnet 192.168.100.4/30. R1 will forward the route information with an administrative distance set to 50. R1 will forward the summarized route information for network 192.168.100.0/24. R1 will forward route information for subnet 10.10.10.0/30 out the serial interface.

36. Refer to the exhibit. What summary address can Router2 advertise to Router1 to reach the three networks on Routers 3, 4, and 5 without advertising any public address space or overlapping the networks on Router1? 172.16.0.0/8 172.16.0.0/10 172.16.0.0/13 172.16.0.0/20 172.16.0.0/24

37. Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is true regarding how the routers in this topology will respond to this event? Router5 flushes the unreachable route from its routing table in 30 seconds. Router4 will learn about the failed route 30 seconds later in the next periodic update. Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0. Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the Holddown timer expires. 38. Which two components are used to determine the router ID in the configuration of the OSPF routing process? (Choose two.) The IP address of the first FastEthernet interface The highest IP address of any logical interface The highest IP address of any physical interface The default gateway IP address The priority value of 1 on any physical interface

39. The Suffolk router is directly connected to the networks shown in the graphic and has a default route that points to the Richmond router. All interfaces are active and properly addressed. However, when the workstation on network 172.29.5.0/24 sends a packet to destination address 172.29.198.5, it is discarded by the Suffolk router. What can be a reason for this result? IP classless has been disabled on the Suffolk router. The ip subnet-zero command was not configured on the Suffolk router. The Richmond router is in a different autonomous system than the Suffolk router. The route was ignored if the Richmond router did not include the 172.29.198.0/24 network in its routing updates.

40. Refer to the exhibit. The routers in the exhibit are running the EIGRP routing protocol. What statement is true regarding how packets will travel from the 172.16.1.0/16 network to the 192.168.200.0/24 network? The router chooses the first path that it learned and installs only that route in the routing table. The router chooses the path with the lowest administrative distance and installs only that route in the routing table. The router chooses the highest routing ID based on the advertised network IP addresses and installs only that route in the routing table. The router installs all the equal cost paths in the routing table but sends packets out only one, holding the others in reserve in case the primary route goes down. The router installs all the equal cost paths in the routing table and performs equal cost load balancing to send packets out multiple exit interfaces.

41. Refer to the exhibit. Router R2 is configured properly and all interfaces are functional. Router R1 has been installed recently. Host A is unable to ping host B. Which procedure can resolve this problem? Configure a static route on R1 using the IP address of the serial interface on R1. Configure a default route on R1 with the exit interface Fa0/0 on R1. Configure a static route on R1 using the IP address of S0/0/0 on R2. Configure a default route on R1 using the IP address of Fa0/0 on R2. 42. A network is configured with the IP, IPX, and AppleTalk protocols. Which routing protocol is recommended for this network? RIPv1 RIPv2 EIGRP OSPF

43. Refer to the exhibit. Which statement is true concerning the routing configuration? Using dynamic routing instead of static routing would have required fewer configuration steps. The 10.1.1.0/24 and 10.1.2.0/24 routes have adjacent boundaries and should be summarized. Packets routed to the R2 Fast Ethernet interface require two routing table lookups. The static route will not work correctly.

44. Refer to the exhibit. A new PC was deployed in the Sales network. It was given the host address of 192.168.10.31 with a default gateway of 192.168.10.17. The PC is not communicating with the network properly. What is the cause? The default gateway is incorrect. The address is in the wrong subnet. The host address and default gateway are swapped. 192.168.10.31 is the broadcast address for this subnet. 45. A network is using RIP as the routing protocol. The router learns that the same destination can be reached via five different paths. All paths have the same metric, and all routers are using the default operation. Which statement correctly describes the path used by the router? It will use the first available path to the destination. It will use only the first two paths that it learned. It will use four of the five paths. It will load-balance using all five paths. 46. A network administrator needs to configure a single router to load-balance the traffic over unequal cost paths. Which routing protocol should the administrator use? EIGRP OSPF RIPv1 RIPv2

47. Refer to the exhibit. What information can be determined from the highlighted output? R1 is originating the route 172.30.200.32/28. Automatic summarization is disabled. The 172.30.200.16/28 network is one hop away from R1. A classful routing protocol is being used.

48. When a router boots, what is the default order to locate the Cisco IOS if there is no boot system command? ROM, TFTP server, flash Flash, TFTP server, ROM Flash, NVRAM, TFTP server NVRAM, TFTP server, flash 49. A network administrator has been asked to configure a network using a classful IP addressing scheme. Which statement is true about the IP addressing that will be used? Classful IP addresses can be used only when static routing is configured in the network. Classful IP addresses allow the network/host boundary to occur at any bit in the 32-bit address. The subnet mask for classful IP addresses can be determined by the value of the first octet of the IP address. Classful IP addresses require the subnet mask to be included in the routing updates that are propagated by the classful routing protocols. 50. A network administrator uses the RIP routing protocol to implement routing within an autonomous system. What are two characteristics of this protocol? (Choose two.) It uses the Bellman-Ford algorithm to determine the best path. It displays an actual map of the network topology. It offers rapid convergence in large networks. It periodically sends complete routing tables to all connected devices. It is beneficial in complex and hierarchically designed networks.







































































1. What are two functions of a router? (Choose two.)

It connects multiple IP networks.

It controls the flow of data via the use of Layer 2 addresses.

It determines the best path to send packets.

It manages the VLAN database.

It increases the size of the broadcast domain

2. When a router boots, what is the default order to locate the Cisco IOS if there is no boot system

command?

ROM, TFTP server, flash

flash, TFTP server, ROM

flash, NVRAM, TFTP server

NVRAM, TFTP server, flash

3. Which router component is used to store the routing table?

Flash

NVRAM

ROM

SDRAM

4. Refer to the exhibit. How many routes are child routes?

1

3

4

6

5. Refer to the exhibit. Which statement is true concerning the routing configuration?

Using dynamic routing instead of static routing would have required fewer configuration steps.

The 10.1.1.0/24 and 10.1.2.0/24 routes have adjacent boundaries and should be summarized.

Packets routed to the R2 Fast Ethernet interface require two routing table lookups.

The static route will not work correctly

6. Refer to the exhibit. The network administrator issues the command no ip classless on Router1. What

forwarding action will take place on a packet that is received by Router1 and is destined for host

192.168.0.26?

The packet will be dropped.

The packet will be forwarded to the gateway of last resort.

The packet will match the 192.168.0.0 network and be forwarded out Serial 0/0.

The packet will most closely match the 192.168.0.8 subnet and be forwarded out Serial 0/1

7. Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative

distance values. All devices are properly configured and the destination network is advertised by both

protocols.

Which path will be used to transmit the data packets between PC1 and PC2?

The packets will travel via R2-R1.


The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.

The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path

8. Refer to the exhibit. Router R1 is configured as shown in the exhibit. PC1 on 172.16.1.0/24 network can

reach the default gateway on R1. The rest of the routers are configured with the correct IP addresses on the

interfaces. Routers R2 and R3 do not have static or dynamic routing enabled. How far will PC1 be able to

successfully ping?

router R1 Fa0/0 interface

router R1 S0/0/0 interface

router R2 S0/0/0 interface

router R2 Fa0/0 and S0/0/1 interfaces

router R3 Fa0/0 and S0/0/0 interfaces

9. Refer to the exhibit. All routers are properly configured to use the EIGRP routing protocol with default

settings, and the network is fully converged. Which statement correctly describes the path that the traffic

will use from the 10.1.1.0/24 network to the 10.1.2.0/24 network?

It will use the A-D path only.

It will use the path A-D, and the paths A-C-D and A-B-D will be retained as the backup paths.

It will use all the paths equally in a round-robin fashion.

The traffic will be load-balanced between A-B-D and A-C-D.

10. Which two statements are true regarding link-state routing protocols? (Choose two.)

They are aware of the complete network topology. They offer rapid convergence times in large networks.

They do not include subnet masks in their routing updates.

They rely on decreasing hop counts to determine the best path.

They do not work well in networks that require special hierarchical designs.

They pass their entire routing tables to their directly connected neighbors only

11. Refer to the exhibit. R1 knows two routes, Path A and Path B, to the Ethernet network attached to R3.

R1 learned Path A to network 10.2.0.0/16 from a static route and Path B to network 10.2.0.0/16 from

EIGRP. Which route will R1 install in its routing table?

Both routes are installed and load balancing occurs across both paths.

The route via Path B is installed because the EIGRP route has the best metric to network 10.2.0.0/16.

The route via Path A is installed because the static route has the best metric to network 10.2.0.0/16.

The route via Path B is installed because the EIGRP route has the lowest administrative distance to network

10.2.0.0/16.

The route via Path A is installed because the static route has the lowest administrative distance to network 10.2.0.0/16.

12. What two routing protocols use a hierarchal network topology? (Choose two.)

IS-IS

EIGRP

OSPF

RIPv1

RIPv2

13. Refer to the exhibit. Based on the output from the show running-config and debug ip rip commands,

what are two of the routes that are added to the routing table of R1? (Choose two.)

R 192.168.1.0/24 [120/1] via 172.16.2.1, 00:00:24, Serial0/0/1

R 192.168.100.0/24 [120/1] via 172.16.1.1, 00:00:24, Serial0/0/0 S 192.168.1.0/24 [1/0] via FastEthernet0/0

R 192.168.9.0/24 [120/1] via 172.16.2.1, 00:00:24, Serial0/0/0

R 192.168.2.0/24 [120/1] via 172.16.1.2, 00:00:24, Serial0/0/0

14. Refer to the exhibit. The network has three connected routers: R1, R2 and R3. The routes of all three

routers are displayed. What can be verified from the output?

R1 and R3 are connected to each other via the S0/0/0 interface.

The IP address of the S0/0/0 interface of R1 is 10.1.1.2.

The IP address of the S0/0/1 interface of R2 is 10.3.3.2.

R2 is connected to the S0/0/1 interface of R3.

15. Refer to the exhibit. All router interfaces are configured with an IP address and are operational. If no

routing protocols or static routes are configured, what information will be included in the show ip route

command output for router A?

All of the 192.168.x.0 networks will be in the routing table.

Routes to networks 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24 will be in the routing table.

The routing table will be empty because routes and dynamic routes have not been configured.

A default route is automatically installed in the routing table to allow connectivity between the networks.

16. Refer to the exhibit. A network administrator is accessing router R1 from the console port. Once the

administrator is connected to the router, which password should the administrator enter at the R1> prompt

to access the privileged EXEC mode?

Cisco001

Cisco123

Cisco789

Cisco901

17. Which of the following could describe the devices labeled “?” in the graphic? (Choose three.)

DCE CSU/DSU

LAN switch

modem

hub

18. Refer to the exhibit. Which router is advertising subnet 172.16.1.32/28?

Router1

Router2

Router3

Router4

19. Refer to the exhibit. The show cdp neighbors command was run at R1. Which two facts about the

newly detected device can be determined from the output? (Choose two.)

ABCD is a router that is connected to R1.

ABCD is a non-CISCO device that is connected to R1.

The device is connected at the Serial0/0/1 interface of R1.

R1 is connected at the S0/0/1 interface of device ABCD.

ABCD does not support switching capability.

20. A static route has been configured on a router. However, the destination network no longer exists. What

should an administrator do to remove the static route from the routing table?

Change the routing metric for that route.

Nothing. The static route will go away on its own.

Change the administrative distance for that route.

Remove the route using the no ip route command.

21. Refer to the exhibit. A ping between host A and host B is successful, but pings from host A to

operational hosts on the Internet fail. What is the reason for this problem?

The FastEthernet interface of R1 is disabled.

One of the default routes is configured incorrectly.

A routing protocol is not configured on both routers.

The default gateway has not been configured on host A.

22. Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three

routers are displayed. All routers are operational and pings are not blocked on this network.

Which ping will fail?

from R1 to 172.16.1.1

from R1 to 192.168.3.1

from R2 to 192.168.1.1

from R2 to 192.168.3.1

23. Refer to the exhibit. What action will R2 take for a packet that is destined for 192.168.2.0?

It will drop the packet.

It will forward the packet via the S0/0/0 interface.

It will forward the packet via the Fa0/0 interface.

It will forward the packet to R1

24. Refer to the exhibit. The users on the local network 172.16.1.0/24 complain that they are unable to

connect to the Internet. What step should be taken to remedy the problem?

A new static route must be configured on R1 with the R3 serial interface as the next hop.

A new default route must be configured on R1 with the R3 serial interface as the next hop.

The default route on R2 should be configured with the R3 serial interface as the next hop.

The default route on R2 must be replaced with a new static route and the next hop should be the R1

FastEthernet interface

25. Refer to the exhibit. What summary address can Router2 advertise to Router1 to reach the three

networks on Routers 3, 4, and 5 without advertising any public address space or overlapping the networks

on Router1?

172.16.0.0/8

172.16.0.0/10

172.16.0.0/13

172.16.0.0/20

172.16.0.0/24

26. Refer to the exhibit. Host A is unable to access the Internet, and troubleshooting has revealed that this is

due to an addressing problem. What is incorrectly configured in this network?

the IP address of the Fa0/0 interface of R1

the subnet mask of the S0/0/0 interface of R1

the IP address of the S0/0/0 interface of R1

the subnet mask of the S0/0/0 interface of R2

27. Refer to the exhibit. A new PC was deployed in the Sales network. It was given the host address of

192.168.10.31 with a default gateway of 192.168.10.17. The PC is not communicating with the network

properly. What is the cause?

The default gateway is incorrect.

The address is in the wrong subnet.

The host address and default gateway are swapped.

192.168.10.31 is the broadcast address for this subnet

28. Refer to the exhibit. The network administrator is planning IP addressing of a new network. What part

of this addressing scheme must be changed to allow communication between host A and the server?

the IP address of the server

the default gateway of host A

the IP address of host A

the default gateway of the server

29. Which network design feature requires the deployment of a classless routing protocol?

private IP addressing

advertising default routes

variable length subnet masks

summarization on major network boundaries

30. A network administrator needs to assign the very last usable IP address in the 172.24.64.0/18 network

range to the router interface that serves this LAN. Which IP address should the administrator configure on

the interface?

172.16.128.154/18

172.16.255.254/18

172.24.64.254/18

172.24.127.254/18

31. Refer to the exhibit. All routers are running RIPv1. The two networks 10.1.1.0/29 and 10.1.1.16/29 are

unable to access each other. What can be the cause of this problem?

Because RIPv1 is a classless protocol, it does not support this access.

RIPv1 does not support discontiguous networks.

RIPv1 does not support load balancing.

RIPv1 does not support automatic summarization.

32. Refer to the exhibit. What information can be determined from the highlighted output?

R1 is originating the route 172.30.200.32/28.

Automatic summarization is disabled.

The 172.30.200.16/28 network is one hop away from R1.

A classful routing protocol is being used

33. What does RIP use to reduce convergence time in a larger network?

It uses multicast instead of broadcast to send routing updates.

It reduces the update timer to 15 seconds if there are more than 10 routes.

It uses triggered updates to announce network changes if they happen in between the periodic updates.

It uses random pings to detect if a pathway is down and therefore is preemptive on finding networks that

are down

34. A network administrator has enabled RIP on routers B and C in the network diagram. Which of the

following commands will prevent RIP updates from being sent to Router A?

A(config)# router rip

A(config-router)# passive-interface S0/0

B(config)# router rip

B(config-router)# network 192.168.25.48



A(config-router)# no network 192.168.25.32

B(config)# router rip B(config-router)# passive-interface S0/0

A(config)# no router rip

35. Refer to the exhibit. Both routers are using the RIP protocol. Devices on the 192.168.1.1 network can

ping the S0/0/0 interface on R2 but cannot ping devices on the 192.168.2.1 network.

What is a possible cause of this problem?

The routers are configured with different versions of RIP.

R2 is not forwarding the routing updates.

The R1 configuration should include the no auto-summary command.

The maximum path number has been exceeded.

36. Which two statements are correct about the split horizon with poison reverse method of routing loop

prevention? (Choose two.)

It is enabled by default on all Cisco IOS implementations.

It assigns a value that represents an infinite metric to the poisoned route. It sends back the poisoned route update to the same interface from where it was received.

It instructs routers to hold all changes that might affect routes, for a specified period of time.

It limits the number of hops a packet can traverse through the network before it is discarded

37. Refer to exhibit. Given the topology shown in the exhibit, what three commands are needed to

configure EIGRP on the Paris router? (Choose three.)

Paris(config)# router eigrp 100

Paris(config)# router eigrp

Paris(config-router)# network 192.168.6.0

Paris(config-router)# network 192.168.7.0 Paris(config-router)# network 192.168.8.0

Paris(config-router)# network 192.168.9.0

38. A router has EIGRP configured as the only routing protocol. In what way might EIGRP respond if there

is no feasible successor route to a destination network and the successor route fails?

It broadcasts hello packets to all routers in the network to re-establish neighbor adjacencies.

It sends queries to adjacent neighbors until a new successor route is found.

It immediately sends its entire routing table to its neighbors.

It will set the metric for the failed route to infinity.

39. Refer to the exhibit. Hosts on the BOS Fa0/0 LAN are able to ping the Fa0/1 interface on the JAX

router and all interfaces on the BOS and ORL routers. Why would hosts from the 10.0.0.0/24 network not

be able to ping hosts on the Fa0/0 LAN of the JAX router?

The JAX router has the wrong process ID.

The JAX router needs the network 10.0.0.0 0.0.0.255 area 0 command. The JAX router needs the network 192.168.3.0 0.0.0.255 area 0 command.

The BOS router needs the network 192.168.3.0 0.0.0.255 area 0 command

40. Which three statements describe the operation of routing with EIGRP? (Choose three.)

As new neighbors are discovered, entries are placed in a neighbor table.

If the feasible successor has a higher advertised cost than the current successor route, then it becomes the

primary route.

If hello packets are not received within the hold time, DUAL must recalculate the topology. The reported distance is the distance to a destination as advertised by a neighbor.

EIGRP maintains full knowledge of the network topology in the topology table and exchanges full routing

information with neighboring routers in every update.

EIGRP builds one routing table that contains routes for all configured routed protocols.

41. Refer to the exhibit. What happens to a packet that has 172.16.0.0/16 as the best match in the routing

table that is shown?

The packet is discarded.

The packet is flooded out all interfaces.

The packet is forwarded via Serial0/0/0.

The packet is forwarded via FastEthernet0/0.

42. A network is configured with the IP, IPX, and AppleTalk protocols. Which routing protocol is

recommended for this network?

RIPv1

RIPv2

EIGRP

OSPF

43. Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)

Automatic summarization is disabled. The EIGRP routing protocol is being used.

There is one feasible successor in the routing table.

The serial interface S0/0/0 is administratively down.

The router is originating the route to 172.16.1.0/24 via the S0/0/0 interface

44. Refer to the exhibit. Two routers are unable to establish an adjacency. What is the possible cause for

this?

The two routers are connected on a multiaccess network.

The hello and dead intervals are different on the two routers.

They have different OSPF router IDs.

They have different process IDs

45. What command would the network administrator apply to a router that is running OSPF to advertise the

entire range of addresses included in 172.16.0.0/19 in area 0?

R1(config-router)# network 172.16.0.0 0.0.0.255 area 0




46. What should be considered when troubleshooting a problem with the establishment of neighbor

relationships between OSPF routers? (Choose two.)

OSPF interval timers mismatch

administrative distance mismatch

interface network type mismatch

no loopback interface configured

gateway of last resort not redistributed

47. Which two components are used to determine the router ID in the configuration of the OSPF routing

process? (Choose two.)

the IP address of the first FastEthernet interface

the highest IP address of any logical interface the highest IP address of any physical interface

the default gateway IP address

the priority value of 1 on any physical interface

48. What is the function of the OSPF LSR packet?

It is used to confirm the receipt of LSUs.

It is used to establish and maintain adjacency with other OSPF routers.

It is used by the receiving routers to request more information about any entry in the DBD.

It is used to check the database synchronization between routers.

49. Refer to the exhibit. All interfaces are configured with the correct IP addresses and subnet masks. OSPF

has been configured as the routing protocol. During troubleshooting, it is determined that hosts on network

B can ping the Lo0 interface on R1 but are unable to reach hosts on network A. What is the cause of the

problem?

Routers R1 and R2 have incorrect router IDs configured.

Router R1 is unable to form a neighbor relationship with router R2.

Routers R1 and R2 have been configured in different OSPF areas.

The configuration of router R1 fails to include network A in the OSPF routing process

50. Refer to the exhibit. The interface addresses and OSPF priorities are configured as shown. Because of

the boot order of the routers, router A is currently the DR and router B is the BDR. If router A fails and is

replaced the next day by a new router, router D, what OSPF protocol action or actions will happen?

Router D will be elected DR, and router C will become the BDR.

Router D will be elected DR, and router B will remain the BDR.

Router C will become the DR, and router B will become the BDR.

Router B will remain the BDR, and OSPF will function on the segment via the use of only the BDR

1. Refer to the exhibit. The output of the show IP route command for three routers on a network is displayed. All routers are operational, pings are not blocked on this network, and no default routes are installed. Which two pings will fail? (Choose two.) • from R1 to 172.16.1.1 • from R1 to 192.168.3.1 • from R2 to 192.168.1.1 • from R2 to 192.168.3.1 • from R3 to 192.168.1.1

2. A router that uses the RIP routing protocol has an entry for a network in the routing table. It then receives an update with another entry for the same destination network but with a lower hop count. What action will the router take for this new update? • It will append the update information to the routing table. • It will invalidate the entry for that network in the routing table. • It will replace the existing routing table entry with the new information. • It will ignore the new update.

3. Which two statements are true for OSPF Hello packets? (Choose two.) • They negotiate correct parameters among neighboring interfaces. • They are used for dynamic neighbor discovery. • They use timers to elect the designated router with the fastest link. • They are received from all routers on the network and used to determine the complete network topology. • They are used to maintain neighbor relationships.

4. A network administrator needs to configure a single router to load-balance the traffic over unequal cost paths. Which routing protocol should the administrator use? • EIGRP • OSPF • RIPv1 • RIPv2

5. Which two statements are correct about the split horizon with poison reverse method of routing loop prevention? (Choose two.) • It is enabled by default on all Cisco IOS implementations. • It assigns a value that represents an infinite metric to the poisoned route. • It sends back the poisoned route update to the same interface from where it was received. • It instructs routers to hold all changes that might affect routes, for a specified period of time. • It limits the number of hops a packet can traverse through the network before it is discarded.

6. Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.) • The command was run on the router.

• ABCD is a non-CISCO device. • Layer 3 connectivity between two devices exists. • ABCD supports routing capability. • ABCD is connected to the Fa0/0 interface of the neighboring device.

7. Refer to the exhibit. The network has three connected routers: R1, R2 and R3. The routes of all three routers are displayed. What can be verified from the output? • R1 and R3 are connected to each other via the S0/0/0 interface. • The IP address of the S0/0/0 interface of R1 is 10.1.1.2. • The IP address of the S0/0/1 interface of R2 is 10.3.3.2. • R2 is connected to the S0/0/1 interface of R3.

8. Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.) • The route to network 172.16.0.0 has an AD of 156160. • Network 192.168.0.16 can best be reached using FastEthernet0/0. • The AD of EIGRP routes has been manually changed to a value other than the default value. • Router1 is running both the EIGRP and OSPF routing process. • Network 172.17.0.0 can only be reached using a default route. • No default route has been configured.

9. Refer to the exhibit. All the routers are properly configured to use the RIP routing protocol with default settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path? • Router A will send the data via the A-D-E path that is listed in the routing table. • Router A will load-balance the traffic between A-B-E and A-C-E. • Router A will determine that all paths have equal metric cost. • Router A will send the data through A-D-E and keep A-B-E and A-C-E as the backup paths.

10. Refer to the exhibit. The network administrator has run the following command on R1. R1# ip route 192.168.2.0 255.255.255.0 172.16.1.2What is the result of running this command? • Traffic for network 192.168.2.0 is forwarded to 172.16.1.2. • This route is automatically propagated throughout the entire network. • Traffic for all networks is forwarded to 172.16.1.2. • The command invokes a dynamic routing protocol for 192.168.2.0.

11. Refer to the exhibit. The network administrator is planning IP addressing of a new network. What part of this addressing scheme must be changed to allow communication between host A and the server? • the IP address of the server • the default gateway of host A

• the IP address of host A • the default gateway of the server

12. Refer to the exhibit. A network administrator has configured OSPF using the following command: network 192.168.1.32 0.0.0.31 area 0 Which router interface will participate in OSPF? • FastEthernet 0/0 • FastEthernet 0/1 • Serial 0/0/0 • Serial 0/0/1

13. Refer to the exhibit. All routers are configured to run RIPv1 and are fully converged. Which routing updates will be received by R3? • updates for 192.168.1.0/24 and 192.168.2.0/24 • updates for 172.16.2.0/24 and 172.16.3.0/24 • updates for 172.16.1.0/24, 172.16.2.0/24 and 172.16.3.0/24 • updates for 172.16.0.0/16

14. Refer to the exhibit. Both routers are using the RIP protocol. Devices on the 192.168.1.1 network can ping the S0/0/0 interface on R2 but cannot ping devices on the 192.168.2.1 network. What is a possible cause of this problem? • The routers are configured with different versions of RIP. • R2 is not forwarding the routing updates. • The R1 configuration should include the no auto-summary command. • The maximum path number has been exceeded.

15. When a router boots, what is the default order to locate the Cisco IOS if there is no boot system command? • ROM, TFTP server, flash • flash, TFTP server, RAM • flash, NVRAM, TFTP server • ROM, flash, TFTP server

16. Refer to the exhibit. Which router is advertising subnet 172.16.1.32/28? • Router1 • Router2 • Router3 • Router4

17. Which mechanism helps to avoid routing loops by advertising a metric of infinity? • route poisoning • split horizon • hold-down timer • triggered updates

18. Refer to the exhibit. What is the meaning of the highlighted value 120? • It is the metric that is calculated by the routing protocol. • It is the value that is used by the DUAL algorithm to determine the bandwidth for the link. • It is the administrative distance of the routing protocol. • It is the hold-down time, measured in seconds, before the next update.

19. Refer to the exhibit. A network administrator successfully pings R1 from R3. Next, the administrator runs the show cdp neighbors command on R3. The output of this command is displayed.What are two reasons for the absence of R1 in the output? (Choose two.) • There is a Layer 2 connectivity problem between R1 and R3. • The Fa0/0 interface of R1 is configured with an incorrect IP address. • The no cdp run command has been run at R1. • The no cdp enable command has been run at Fa0/1 interface of R3.R1 is powered off.

20. Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.) • a CSU/DSU device • a modem • an Ethernet switch • a hub • a bridge

21. In a complex lab test environment, a router has discovered four paths to 192.168.1.0/24 via the use of the RIP routing process. Which route will be installed in the routing table after the discovery of all four paths? • R 192.168.1.0/24 [120/3] via 192.168.110.1, 00:00:17, Serial 0/1/0 • R 192.168.1.0/24 [120/2] via 192.168.200.1, 00:00:17, Serial 0/0/0 • R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial 0/0/1 • R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial 0/1/1

22. Refer to the exhibit. A network administrator accesses router R1 from the console port to configure a newly connected interface. What passwords will the network administrator need to enter to make the connection and the necessary configuration changes? • the Cisco123 password only • the Cisco789 password only • the Cisco001 password only • the Cisco001 password and the Cisco789 passwords • the Cisco001 password and the Cisco123 passwords

23. Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. What is the result of adding this command? • This route is automatically propagated throughout the network. • The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.

• A static route is established. • The traffic for all Class C networks is forwarded to 172.16.1.2.

24. Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the router handle this packet? • It will forward the packet via the Serial0/0/1 interface. • It will forward the packet via the FastEthernet0/0 interface. • It will forward the packet via the Serial0/0/0 interface. • It will drop the packet.

25. Which two statements are true about classless routing protocols? (Choose two.) • They can be used for discontiguous subnets. • They can forward supernet routes in routing updates. • They cannot implement classful routes in routing tables. • They use only a hop count metric. • They do not include the subnet mask in routing updates.

26. Refer to the exhibit. How many routes are child routes? • 1 • 3 • 4 • 6

27. A router has EIGRP configured as the only routing protocol. In what two ways does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails? (Choose two.) • It broadcasts hello packets to all routers in the network to re-establish neighbor adjacencies. • It sends queries to adjacent neighbors until a new successor route is found. • It immediately sends its entire routing table to its neighbors. • It sends queries to adjacent neighbors until the lost route is unknown to the neighbors. • It automatically forwards traffic to a fallback default route until a successor route is found.

28. Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.) • 10.0.0.0/8 • 64.100.0.0/16 • 128.107.0.0/16 • 172.16.40.0/24 • 192.168.1.0/24 • 192.168.2.0/24

29. Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.) • The administrative distance of EIGRP has been set to 50.

• All routes are stable. • The show ip eigrp topology command has been run on R1. • The serial interface between the two routers is down. • Each route has one feasible successor.

30. Refer to the exhibit. All routers are properly configured with default configurations and are running the OSPF routing protocol. The network is fully converged. A host on the 192.168.3.0/24 network is communicating with a host on the 192.168.2.0/24 network. Which path will be used to transmit the data? • The data will be transmitted via R3-R2. • The data will be transmitted via R3-R1-R2. • The traffic will be load-balanced between two paths — one via R3-R2, and the other via R3-R1-R2. • The data will be transmitted via R3-R2, and the other path via R3-R1-R2 will be retained as the backup path.

31. A network administrator has enabled RIP on routers B and C in the network diagram. Which of the following commands will prevent RIP updates from being sent to Router A? • A(config)# router rip A(config-router)# passive-interface S0/0 • B(config)# router rip B(config-router)# network 192.168.25.48 B(config-router)# network 192.168.25.64 • A(config)# router rip A(config-router)# no network 192.168.25.32 • B(config)# router rip B(config-router)# passive-interface S0/0 • A(config)# no router rip

32. Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured? • the IP address of the Fa 0/0 interface at R1 • the IP address of the S 0/0/1 interface at R2 • the IP address of the S 0/0/0 interface at R1 • the subnet mask of the S 0/0/1 interface at R2

33. Refer to the exhibit. A ping from R1 to 10.1.1.2 is successful, but a ping from R1 to 192.168.2.0 fails. What is the cause of this problem? • There is no gateway of last resort at R1. • The serial interface between the two routers is down. • A default route is not configured on R1. • The static route for 192.168.2.0 is incorrectly configured.

34. Refer to the exhibit. The network administrator has run the show ip protocol command on R1. What can be determined from the exhibited output?

• The router is using RIPv2. • The router is not forwarding routing updates. • The router is receiving updates for both versions of RIP. • The FastEthernet0/0 interface is down. 35. Refer to the exhibit. All routers are configured to use the EIGRP routing protocol with default settings, all routes are advertised on all routers, and the network is fully converged. Which path will the data take to travel between 172.16.1.0/24 and 192.168.100.0/24? • It will travel via A, B, and C. • It will travel via A, F, E, D, and C. • It will travel via A, G, H, and C. • The traffic will be load-balanced on all paths.

36. Refer to the exhibit. All routers are configured for OSPF area 0. The network administrator requires that R2 always be the DR and maintain adjacency.Which two configurations can achieve this? (Choose two.) • Change the OSPF area of R2 to a higher value. • Change the router ID for R2 by assigning the IP address 172.16.30.5/24 to the Fa0/0 interface. • Change the priority values of the Fa0/0 interfaces of R1 and R3 to 0. • Configure a loopback interface on R2, with an IP address higher than any IPaddress on the other routers. • Configure R1 and R3 with an IP address whose value is higher than that of R2.

37. Refer to the exhibit. Host A is unable to access the Internet, and troubleshooting has revealed that this is due to an addressing problem. What is incorrectly configured in this network? • the IP address of the Fa 0/0 interface of R1 • the subnet mask of the S 0/0/0 interface of R1 • the IP address of the S 0/0/0 interface of R1 • the subnet mask of the S0/0/0 interface of R2

38. Refer to the exhibit. All routes are advertised and fully operational on all routers. Which statement is true about the path that the data will take from router A to router B? • If EIGRP is used with default configurations, the data will be equally distributed between two paths — A, D, B and A, C, D. • If RIPv1 is used with default configurations, the data will be load-balanced on all paths. • If EIGRP and OSPF are both used with default configurations, the data will be sent through paths learned by the OSPF protocol. • If RIPv2 is used with default configurations, the data will be equally distributed between two paths — A, D, B and A, C, D.

39. Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routers are unable to establish a neighbor adjacency. What should the network administrator do to troubleshoot this problem?

• Check if the interfaces of the routers are enabled. • Check the hello and dead intervals between the routers. • Check the process ID of both routers. • Check if CDP is enabled on all the routers.

40. Refer to the exhibit. What information can be determined from the highlighted output? • R1 is originating the route 172.30.200.32/28. • Automatic summarization is disabled. • The 172.30.200.16/28 network is one hop away from R1. • A classful routing protocol is being used.

41. Which two router component and operation pair are correctly described? (Choose two.) • DRAM -loads the bootstrap • RAM -stores the operating system • Flash -executes diagnostics at bootup • NVRAM -stores the configuration file • ROM -stores the backup configuration file • POST -runs diagnostics on hardware modules

42. Which routing protocol by default uses bandwidth and delay to calculate the metric of a route? • RIPv1 • RIPv2 • OSPF • EIGRP

43. Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.) • the same process ID • the same area ID • network addresses and wildcard masks • the same router ID • the same loop back address

44. Refer to the exhibit. The networks that are connected to R1 have been summarized for R2 as 192.168.136.0/21. Which packet destination address will R2 forward to R1? • 192.168.135.1 • 192.168.142.1 • 192.168.144.1 • 192.168.128.1

45. Refer to the exhibit. R1 is running RIP with default parameters. R1 has learned four different paths with the same metrics to network 192.168.6.0. Which path or paths will R1 use to forward a packet that is destined to 192.168.6.10?

• the first path that the router learned. • only the first two of the four paths that the router learned. • the last path that the router learned. • all four paths.

46. What are two functions of a router? (Choose two.) • It connects multiple IP networks. • It controls the flow of data via the use of Layer 2 addresses. • It determines the best path to send packets. • It manages the VLAN database. • It increases the size of the broadcast domain.

47. Refer to the exhibit. Which statement is true about the routing process for this network? • A packet leaves interface Fa0/0 of R1 with the source MAC address as 000C.3010.9260. • The packet leaves interface Fa0/0 of R1 with the source MAC address as 000C.3010.9260. • The no shutdown command needs to run on the Fa0/0 interface of R1. • The Fa0/0 interface of R2 could be configured with the IP address 172.16.4.1/24.

48. Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required to make this interface operational? • Switch the cable with a known working cable. • Issue the no shutdown command on the interface. • Configure the interface as a loopback interface. • Set the encapsulation for the interface.

49. Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to configure a single area OSPF for the networks that are connected to R2? • R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config-router)# network 10.1.1.0 0.0.0.3 area 0 • R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config)# router ospf 2 R2(config-router)# network 10.1.1.0 0.0.0.3 area 0 • R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config-router)# network 10.1.1.0 0.0.0.3 area 1 • R2(config)# router ospf 1 R2(config-router)# network 192.168.2.0 0.0.0.255 area 0 R2(config-router)# network 10.0.0.0 0.0.0.3 area 1

50. Refer to the exhibit. The command ip route 0.0.0.0 0.0.0.0 S0/0/0 is run on router R2. What are the two results of this command? (Choose two.) • A static route will be updated in the routing table. • The traffic from the Internet will be directed to R2. • The traffic from the source network 172.16.0.0/22 will be blocked. • The route will be specified as the default route for all networks not defined in the routing table. • All the broadcasts will be forwarded via the S0/0/0 interface of R2.

51. Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a router? (Choose three.) • The router modifies the TTL field, decrementing it by one. • The router changes the source IP to the IP of the exit interface. • The router maintains the same source and destination IP. • The router changes the source physical address to the physical address of the exit interface. • The router changes the destination IP to the IP of the exit interface. • The router sends the packet out all other interfaces, besides the one it entered the router on.

52. What are two tasks that must be completed before two routers can use OSPF to form a neighbor adjacency? (Choose two.) • The routers must elect a designated router. • The routers must agree on the network type. • The routers must use the same dead interval. • The routers must exchange link state requests. • The routers must exchange database description packets.

53. Refer to the exhibit. Although both the routers can ping the serial interface of their neighbors, they are unable to ping the Ethernet interfaces of other routers. Which two statements are true for this network? (Choose two.) • The administrative distance has been set to 50 on both routers. • R2 is learning about network 192.168.1.0. • R1 is learning about network 192.168.2.0. • The network 10.1.1.0 command has not been run on both routers. • Autosummarization is enabled on both routers.

54. Which two situations require the use of a link-state protocol? (Choose two.) • Fast convergence of the network is critical. • The network is very large. • The network administrator has limited knowledge to configure and troubleshoot routing protocols.The network is a flat network. • The capacity of the router is low.

55. Refer to the exhibit. What information can be determined from the displayed output? • EIGRP packets are waiting to be sent to the neighbors.

• The adjacencies between the routers are yet to be established. • The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2. • Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.

56. Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem? • An incorrect IP address is configured between the two routers. • No static route is configured on Router2. • A routing loop has occurred. • No routing protocol is configured on either of the two routers.

57. Refer to the exhibit. What summarization should R2 use to advertise its LAN networks to R1? • 172.16.0.0/24 • 172.16.4.0/22 • 172.16.4.0/23 • 172.16.4.0/24

Close Window

Assessment System

1. Assessment Selection 2. Assessment Settings 3. Take Assessment

Take Assessment - ERouting Final Exam - CCNA Exploration: Routing Protocols and Concepts (Version

4.0)

Time Remaining:

1 Using default settings, what is the next step in the router boot sequence after the IOS loads from flash?

Perform the POST routine.

Search for a backup IOS in ROM.

Load the bootstrap program from ROM.

Load the running-config file from RAM.

Locate and load the startup-config file from NVRAM.

2

Refer to the exhibit. The command ip route 0.0.0.0 0.0.0.0 S0/0/0 is run on router R2. What are the two results of this command?

(Choose two.)

A static route will be updated in the routing table.

The traffic from the Internet will be directed to R2.

The traffic from the source network 172.16.0.0/22 will be blocked.

The route will be specified as the default route for all networks not defined in the routing table.

All the broadcasts will be forwarded via the S0/0/0 interface of R2.

3 Which three statements about routing protocols are true? (Choose three.)

EIGRP supports unequal cost load balancing.

RIP cannot be configured to allow classless routing.

OSPF elects designated routers on multiaccess links.

RIP does not advertise a route beyond a hop count of 15.

EIGRP uses broadcast traffic to establish adjacencies with its neighbors.

OSPF can convergence more quickly because it can find a feasible successor in its topology table when a successor route goes

down.

4 Which two statements are true about the EIGRP successor route? (Choose two.)

It is saved in the topology table for use if the primary route fails.

It may be backed up by a feasible successor route.

It is used by EIGRP to forward traffic to the destination.

It is flagged as active in the routing table.

After the discovery process has occurred, the successor route is stored in the neighbor table.

5 Which statement correctly describes a feasible successor in EIGRP?

It is a primary route that is stored in the routing table.

It is a backup route that is stored in the routing table.

It is a primary route that is stored in the topology table.

It is a backup route that is stored in the topology table.

6 A network administrator is in charge of two separate networks that share a single building. What device will be required to connect the

two networks and add a common connection to the Internet that can be shared?

hub

router

http://assessment.netacad.net/virtuoso/delivery/pub-doc/exam.shtml

1 z 5 2010-02-25 19:39

access point

Ethernet switch

7

Refer to the exhibit. Although R2 is configured correctly, host A is unable to access the Internet. What are two static routes that can be

configured on R1, either of which would enable Internet connectivity for host A? (Choose two.)

ip route 0.0.0.0 0.0.0.0 Fa0/0

ip route 0.0.0.0 0.0.0.0 Fa0/1

ip route 0.0.0.0 0.0.0.0 10.1.1.1

ip route 0.0.0.0 0.0.0.0 10.1.1.2

ip route 209.165.202.0 255.255.255.0 10.1.1.1

8

Refer to the exhibit. Two routers that are configured for area 0 are unable to establish neighbor adjacency. Which two configuration

changes should be made to resolve this problem? (Choose two.)

Both the routers should be configured for the same router ID.

The serial interface of both the routers must be configured in the same subnet.

Both the routers should be configured as designated routers.

Both the routers should be configured for the same process ID.

The network 10.1.1.0 0.0.0.3 area 0 command must be issued on both routers.

9


2 z 5 2010-02-25 19:39

Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?

An incorrect IP address is configured between the two routers.

No static route is configured on Router2.

A routing loop has occurred.

No routing protocol is configured on either of the two routers.

10 Which mechanism helps to avoid routing loops by advertising a metric of infinity?

route poisoning

split horizon

hold-down timer

triggered updates

11

Refer to the exhibit. Two remote sites are connected to the HQ router. The router New is configured using RIPv2 and the router BR1 is

configured using EIGRP. If HQ is configured with RIPv2 and EIGRP, how will the 172.16.10.0/24 network be added to the routing table of

HQ after the network converges?

with two paths of the same cost to the 172.16.10.0/24 network

with one path to the 172.16.10.0/24 network via router BR1

with one path to the 172.16.10.0/24 network via router NEW

with two paths of different cost to the 172.16.10.0/24 network

12 How will a router that is configured with a classless routing protocol determine the subnet mask that should be assigned to routes that

are learned from neighboring classless routers?

The subnet mask that is included in the routing updates will be used.

The subnet mask of the interface that receives the update will be used.


3 z 5 2010-02-25 19:39

The subnet mask that is specified in the network command will be used.

The class of the network in the update will determine the subnet mask that is used.

13

Refer to the exhibit. How many routes are both level 1 and qualify for use as an ultimate route?

1

2

3

4

5

6

14

Refer to the exhibit. The hosts that are connected to R2 are unable to ping the hosts that are connected to R1. How can this problem be

resolved?

Configure the router ID on both routers.

Configure the R2 router interfaces for area 0.

Configure a loopback interface on both routers.

Configure the proper subnet masks on the router interfaces.

15 Which two router component and operation pair are correctly described? (Choose two.)

DRAM - loads the bootstrap

RAM - stores the operating system

Flash - executes diagnostics at bootup

NVRAM - stores the configuration file

ROM - stores the backup configuration file

POST - runs diagnostics on hardware modules

Showing 1 of 4 <Prev Page: Next>

Close Window


4 z 5 2010-02-25 19:39

All contents copyright 1992-2009 Cisco Systems, Inc. Privacy Statement and Trademarks.


5 z 5 2010-02-25 19:39

Close Window

Assessment System

1. Assessment Selection 2. Assessment Settings 3. Take Assessment

Take Assessment - ERouting Final Exam - CCNA Exploration: Routing Protocols and Concepts (Version

4.0)

Time Remaining:

31 Which subnetting scheme will accommodate a network of 10 LANs, each of which contains a minimum of 2000 hosts?

10.0.0.0/10

10.0.0.0/11

172.16.0.0/18

172.16.0.0/20

32

Refer to the exhibit. A network administrator is troubleshooting the OSPF network. The 10.10.0.0/16 network is not showing up in the

routing table of Router1. What is the probable cause of this problem?

The serial interface on Router2 is down.

The OSPF process is not running on Router2.

The OSPF process is configured incorrectly on Router1.

There is an incorrect wildcard mask statement for network 10.10.0.0/16 on Router2.

33


1 z 5 2010-02-25 19:59

Refer to the exhibit. All routers are properly configured with default configurations and are running the OSPF routing protocol. The

network is fully converged. A host on the 192.168.3.0/24 network is communicating with a host on the 192.168.2.0/24 network.

Which path will be used to transmit the data?

The data will be transmitted via R3-R2.

The data will be transmitted via R3-R1-R2.

The traffic will be load-balanced between two paths — one via R3-R2, and the other via R3-R1-R2.

The data will be transmitted via R3-R2, and the other path via R3-R1-R2 will be retained as the backup path.

34 Which statement correctly describes a feature of RIP?

RIP is a link-state routing protocol.

RIP uses only one metric—hop count— for path selection.

Advertised routes with hop counts greater than 10 are unreachable.

Messages are broadcast every 10 seconds.

35

Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?

host A

host B

host C

host D

36

Refer to the exhibit. Which two facts can be derived from this output? (Choose two.)

Three network devices are directly connected to Router2.

The serial interface between Router2 and Router3 is up.

Router1 and Router3 are directly connected.

Six devices are up and running on the network.

Layer 3 functionality between routers is configured properly.

37 Which statement is true regarding routing metrics?

All routing protocols use the same metrics.

EIGRP uses bandwidth as its only metric.


2 z 5 2010-02-25 19:59

Routers compare metrics to determine the best route.

The larger metric generally represents the better path.

38 In which situation would a default static route be recommended?

when connecting an edge router to the Internet

when variable length subnet masking is in effect

when there is more than one valid route for a destination network

when a destination network has a larger mask than any routes in the routing table

39 When would the network administrator use the ip bandwidth-percent eigrp as-number percent command?

when there is a low bandwidth connection

when the connection is on a shared medium

when the connection is serial instead of Ethernet

when the link is always busy

40

Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing

protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor

adjacency.

What action should be taken to solve this problem?

Enable the serial interfaces of both routers.

Configure EIGRP to send periodic updates.

Configure the same hello interval between the routers.

Configure both routers with the same EIGRP process ID.

41

Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)

All routes are stable.


3 z 5 2010-02-25 19:59

Each route has one feasible successor.

The serial interface between the two routers is down.

The administrative distance of EIGRP has been set to 50.

The show ip eigrp topology command has been run on R1.

42

Refer to the exhibit. Which route will be removed from the routing table if manual EIGRP summarization is disabled the Serial0/0/0

interface of R3?

0.0.0.0/0

172.16.0.0/16

172.16.1.0/24

172.16.3.0/30

43 You have been asked to explain converged networks to a trainee. How would you accurately describe a converged network?

A network is converged when all routers have formed an adjacency.

A network is converged immediately after a topology change has occurred.

A network is converged when all routers flush the unreachable networks from their routing tables.

A network is converged after all routers share the same information, calculate best paths, and update their routing tables.

44

Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are

properly configured and the destination network is advertised by both protocols.

Which path will be used to transmit the data packets from PC1 to PC2?




The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.


4 z 5 2010-02-25 19:59

45

Refer to the exhibit. A static route was configured on router R1 to forward packets to the remote networks. During a network upgrade, the

network administrator configured RIPv2 on all routers in the network. What will router R1 do with a packet that is sourced from PC1 and

destined for PC3?

The packet will be forwarded out the Serial0/0/0 interface via the static route.

The packet will be forwarded out the FastEthernet0/1 interface via the static route.

The packet will be forwarded out the Serial0/0/0 interface via the route that is learned through RIP.

The packet will be forwarded out the FastEthernet0/1 interface via the route that is learned through RIP.

Showing 3 of 4 <Prev Page: Next>

Close Window

All contents copyright 1992-2009 Cisco Systems, Inc. Privacy Statement and Trademarks.


5 z 5 2010-02-25 19:59

1 Refer to the exhibit. While trying to diagnose a routing problem in the network, the network administrator runs the debug ip rip command. What can be determined from the output of this command?

The router is broadcasting RIP updates.

The router will be unable to ping 192.168.1.2.

The router is directly connected to network 172.16.1.0 /24.

The router has two interfaces that participate in the RIP process.2 The network administrator configures the router with the

ip route 172.16.1.0 255.255.255.0 172.16.2.2 command. How will this route appear in the routing table?

C 172.16.1.0 is directly connected, Serial0/0

S 172.16.1.0 is directly connected, Serial0/0

C 172.16.1.0 [1/0] via 172.16.2.2

S 172.16.1.0 [1/0] via 172.16.2.2

3 When connecting two devices, which situation would normally require the use of a crossover cable?

connecting a host to a switch

connecting a switch to a router

connecting a switch to a switch

connecting a host to a router console port



4

Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network?

ADC

ABC

It will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.

5

Refer to the exhibit. A company uses static routing for its internal network.



The network administrator at the HR branch decides to modify the static routes by adding two commands ip route 172.16.1.0 255.255.255.0 serial 0/0/0 and ip route 172.16.3.0 255.255.255.0 serial 0/0/0 on the HR router. What is the effect in the running configuration after adding these two commands?

A total of four static routes will appear.

The original two static routes will be replaced by two new static routes.Only the two original static routes will appear. The two new static routes will be discarded.The two new static routes will not appear in the configuration, but are kept in the database as backup.

6

Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)

a CSU/DSU device

a modem

an Ethernet switch

a hub

a bridge

7

Refer to the exhibit. What summarization should R2 use to advertise its LAN networks to R1?

172.16.0.0/24

172.16.4.0/22

172.16.4.0/23

172.16.4.0/24



8

Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)

10.0.0.0/8

64.100.0.0/16

128.107.0.0/16

172.16.40.0/24

192.168.1.0/24

192.168.2.0/24

9

Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. What is the result of adding this command?

This route is automatically propagated throughout the network.

The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.

A static route is established.

The traffic for all Class C networks is forwarded to 172.16.1.2.



Refer to the exhibit. What is the meaning of the highlighted value 120?

1011 When presented with multiple valid routes to a destination, what criteria does a router use to

determine which routes to add to the routing table?The router selects the routes with the best metric. All routes that have the same best metric are added to the routing table.The router first selects routes with the lowest administrative distance. The resulting routes are then prioritized by metric and the routes with the best metric are added to the routing table.The router selects the routes with the lowest administrative distance. All routes with the same lowest administrative distance are added to the routing table.The router installs all routes in the routing table but uses the route with the best metric most when load balancing.

It is the metric that is calculated by the routing protocol

.

It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.

It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.


12 A router has learned two equal cost paths to a remote network via the EIGRP and RIP protocols. Both protocols are using their default configurations. Which path to the remote network will be installed in the routing table?

the path learned via EIGRP

the path learned via RIP

the path with the highest metric value

both paths with load balancing

13 Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.

The shortest path first algorithm is used.

Split horizon is used to avoid routing loops.

14

Refer to the exhibit. When the show cdp neighbors command is issued from router C, which devices will be displayed in the output?

B, D

A, B, D

D, SWH-2

SWH-1, A, B

SWH-1, SWH-2

A, B, D, SWH-1, SWH-2

15






All routes are stable.




The show ip eigrp topology command has been run on R1.

16

Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?

10.1.1.1

10.1.1.2

172.16.1.1

192.168.1.1

17



Refer to the exhibit. A network administrator accesses router R1 from the console port to configure a newly connected interface. What passwords will the network administrator need to enter to make the connection and the necessary configuration changes?

the Cisco123 password only



the Cisco001 password and the Cisco789 passwords

the Cisco001 password and the Cisco123 passwords

18

Refer to the exhibit. The network is using the RIPv2 routing protocol. If network 10.0.0.0 goes down, what mechanism will prevent Router1 from advertising false routing information back to Router2?

triggered updates

poison reverse

holddown timers

split horizon

19



Refer to exhibit. A company network engineer enters the following commands in the routers:

R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1

When the engineer enters the show ip route command on R1, the routing table does not display the static route to the 10.1.1.0 network. All R1 and R2 interfaces are correctly addressed per the graphic. What is a logical next step that the engineer could take in order to make the static route display in the routing table in R1?

Enter default routes in R1 and R2.

Enable the R1 and R2 serial interfaces.

Configure the static route to use an exit interface instead of a next-hop address.

Enter the copy run start command to force the router to recognize the configuration.

20


Refer to the exhibit. Which statement is true about the EIGRP routing process on the network?EIGRP autosummarization is disabled on RouterA.

The default EIGRP administrative distance has been changed on RouterB.

Packets to the 172.16.0.0/24 network are forwarded to RouterA from RouterB.The metric that is used by the EIGRP process on RouterB to forward packets to Router A is 90.

Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?

host A

host B

host C

host D

22

Refer to the exhibit. The command ip route 0.0.0.0 0.0.0.0 S0/0/0 is run on router R2. What are the two results of this command? (Choose two.)

A static route will be updated in the routing table.

The traffic from the Internet will be directed to R2.

The traffic from the source network 172.16.0.0/22 will be blocked.The route will be specified as the default route for all networks not defined in the routing table.All the broadcasts will be forwarded via the S0/0/0 interface of R2.

23

Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to configure a single area OSPF for the networks that are connected to R2?

R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 1

24




Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The network administrator has run the show ip route command on R1.

What could be the cause of this problem?The FastEthernet interface on R1 is disabled.

Autosummarization is enabled on R1.

The serial interface S0/0/0 of R1 is administratively down.

No static route or routing protocol is configured.

25

Refer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load the start-up configuration settings.

What could be the cause of this problem?There is insufficient NVRAM.

There is insufficient flash memory.

The configuration register is not configured with the default setting.

The system image file is not located in NVRAM.

26 A company is using static routes that are configured with an administrative distance of “1” on



all routers in the network. The network administrator decides to introduce a dynamic routing protocol to reduce the manual configurations for the static routes. Which option identifies the correct procedure for the dynamic routing to take place in the network?

The static routes and the dynamic routes will have the traffic alternate between them.

The static routes will be automatically removed once the dynamic routing is configured. The static routes will be automatically updated with the next hop IP address once the dynamic routing is configured. The static routes must be manually removed from all routers in order for the dynamic routes to be installed in the routing table.

27

Refer to the exhibit. R2 is configured correctly. The network administrator has configured R1 as shown. Which two facts are true about the forwarding of route information by R1? (Choose two.)

R1 will forward the route information for subnet 192.168.100.0/30.

R1 will not forward route information for subnet 192.168.100.4/30.

R1 will forward the route information with an administrative distance set to 50.

R1 will forward the summarized route information for network 192.168.100.0/24.

R1 will forward route information for subnet 10.10.10.0/30 out the serial interface.

28 Which router component contains a scaled-down version of the IOS that can be used to reload a complete version of the IOS in the event that the IOS becomes damaged or corrupted?

ROM

Flash

SDRAM

NVRAM

29




Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.

The default gateway of host A is incorrect.

The Fa0/1 interfaces of the two routers are configured for different subnets.

The subnet mask for the Fa0/0 interface of R1 is incorrect.

30

Refer to the exhibit. A network administrator has configured OSPF using the following command:

network 192.168.1.32 0.0.0.31 area 0

Which router interface will participate in OSPF?FastEthernet0/0

FastEthernet0/1

Serial0/0/0

Serial0/0/131 A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each

containing up to 2000 hosts for local LANs. Which subnet mask should the administrator use to create the new subnets?

255.255.224.0

255.255.240.0

255.255.248.0



255.255.252.0

32

Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)

The route to network 172.16.0.0 has an AD of 156160.

Network 192.168.0.16 can best be reached using FastEthernet0/0.

The AD of EIGRP routes has been manually changed to a value other than the default value.

Router1 is running both the EIGRP and OSPF routing process.

Network 172.17.0.0 can only be reached using a default route.

No default route has been configured.

33



Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.)

The missing information for Blank 1 is the command show ip route.

The missing information for Blank 1 is the command debug ip route.

The missing information for Blank 2 is the number 100.

The missing information for Blank 2 is the number 120.

The missing information for Blank 3 is the letter R.

The missing information for Blank 3 is the letter C.

34 Which statement correctly describes a feature of RIP?

RIP is a link-state routing protocol.

RIP uses only one metric—hop count— for path selection.

Advertised routes with hop counts greater than 10 are unreachable.

Messages are broadcast every 10 seconds.

35

Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the router handle this packet?

It will forward the packet via the FastEthernet0/0 interface.

It will forward the packet via the Serial0/0/0 interface.



It will forward the packet via the Serial0/0/1 interface.


36

Refer to the exhibit. OSPF is used for the routing protocol and all interfaces are configured with the correct IP addresses and subnet masks. During testing, it is found that router R1 is unable to form an adjacency with R2. What is the cause of this problem?

Both routers have been configured with incorrect router IDs.

Both routers have been configured in different OSPF areas.

Both routers have been configured with an incorrect network type.

Both routers have been configured with different hello and dead intervals.

37



Refer to the exhibit. The routers in the exhibit are running the EIGRP routing protocol. What statement is true regarding how packets will travel from the 172.16.1.0/16 network to the 192.168.200.0/24 network?

The router chooses the first path that it learned and installs only that route in the routing table.

The router chooses the path with the lowest administrative distance and installs only that route in the routing table.

The router chooses the highest routing ID based on the advertised network IP addresses and installs only that route in the routing table.

The router installs all the equal cost paths in the routing table but sends packets out only one, holding the others in reserve in case the primary route goes down.

The router installs all the equal cost paths in the routing table and performs equal cost load balancing to send packets out multiple exit interfaces.

38 How will a router that is configured with a classless routing protocol determine the subnet mask that should be assigned to routes that are learned from neighboring classless routers?

The subnet mask that is included in the routing updates will be used.

The subnet mask of the interface that receives the update will be used.

The subnet mask that is specified in the network command will be used.

The class of the network in the update will determine the subnet mask that is used.

39 Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)

the same process ID



the same area ID

network addresses and wildcard masks

the same router ID

the same loop back address

40

Refer to the exhibit. The network administrator has run the following command on R1.

R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2

What is the result of running this command?

Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.

This route is automatically propagated throughout the entire network.

Traffic for all networks is forwarded to 172.16.1.2.

The command invokes a dynamic routing protocol for 192.168.2.0.

41 Which statement correctly describes a feasible successor in EIGRP?It is a primary route that is stored in the routing table.

It is a backup route that is stored in the routing table.

It is a primary route that is stored in the topology table.

It is a backup route that is stored in the topology table.

42




Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor adjacency.

What action should be taken to solve this problem?Enable the serial interfaces of both routers.



Configure both routers with the same EIGRP process ID.

43

Refer to the exhibit. What information can be determined from the displayed output?EIGRP packets are waiting to be sent to the neighbors.

The adjacencies between the routers are yet to be established.

The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.

44



Refer to the exhibit. How many routes are ultimate routes?3

4

5

7

45 What is the function of the OSPF LSU packet?used to confirm receipt of certain types of OSPF packets

used to establish and maintain adjacency with other OSPF routers

used to request more information about any entry in the BDR

used to announce new OSPF information and to reply to certain types of requests

46

Refer to the exhibit. A network administrator is trying to determine why router JAX has no OSPF routes in its routing table. All routers are configured for OSPF area 0. From the JAX router, the administrator is able to ping its connected interfaces and the Fa0/1 interface of the ORL router but no other router interfaces. What is a logical step that the network administrator should take to troubleshoot the problem?

Reboot the routers.

Change the OSPF process ID on all of the routers to 0.

Check to see if the cable is loose between ORL and JAX.



Check to see if CDP packets are passing between the routers.

Use show and debug commands to determine if hellos are propagating.

47 Which three statements describe the operation of routing with EIGRP? (Choose three.)As new neighbors are discovered, entries are placed in a neighbor table.If the feasible successor has a higher advertised cost than the current successor route, then it becomes the primary route.If hello packets are not received within the hold time, DUAL must recalculate the topology.

The reported distance is the distance to a destination as advertised by a neighbor.EIGRP maintains full knowledge of the network topology in the topology table and exchanges full routing information with neighboring routers in every update.EIGRP builds one routing table that contains routes for all configured routed protocols.

48

Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)

The command was run on the router.

ABCD is a non- CISCO device.

Layer 3 connectivity between two devices exists.

ABCD supports routing capability.

ABCD is connected to the Fa0/0 interface of the neighboring device.

49




Refer to the exhibit. An administrator is adding a new subnet of 50 hosts to R3. Which subnet address should be used for the new subnet that provides enough addresses while wasting a minimum of addresses?

192.168.1.0/24

192.168.1.48 /28

192.168.1.32/27

192.168.1.64/26

50

Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configured and operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any routes from R1 in the routing table. What is the likely cause?

The adjacent interfaces are passive.

The distance of 120 exceeds 15 hops.

R2 will not accept version 1 updates from R1.

Routes are being summarized by R1 but not by R2.51 What are two functions of a router? (Choose two.)

It forwards data packets toward their destination.

It forwards the packet to the destination if the TTL value is 0.It changes the destination IP address of data packets before forwarding them to an exit interface.



It determines the best path based on the destination MAC address.

It acts as an intersection between multiple IP networks.

52

Refer to the exhibit. The IP addresses on all interfaces on router R1 were configured before the OSPF protocol had been enabled on the router. No OSPF router ID was manually configured. Which IP address will be selected by the router as an OSPF router ID?

10.10.10.1

172.16.1.1

172.16.2.1

192.168.1.1

192.168.100.1


Final Exam - CCNA Exploration: Routing Protocols and Concepts (Version 4.0)

By: Ironman

1

Which routing protocol maintains a topology table separate from the routing table?

IGRP

RIPv1

RIPv2

*EIGRP

2

Refer to the exhibit. All routers are running RIPv1. The two networks 10.1.1.0/29 and 10.1.1.16/29 are unable to access each

other. What can be the cause of this problem?

Because RIPv1 is a classless protocol, it does not support this access.

*RIPv1 does not support discontiguous networks.

RIPv1 does not support load balancing.

RIPv1 does not support automatic summarization.

3

Which two statements are correct about the split horizon with poison reverse method of routing loop prevention? (Choose

two.)

It is enabled by default on all Cisco IOS implementations.

*It assigns a value that represents an infinite metric to the poisoned route.

It sends back the poisoned route update to the same interface from where it was received.

It instructs routers to hold all changes that might affect routes, for a specified period of time.

*It limits the number of hops a packet can traverse through the network before it is discarded.

Holddown timers are used to prevent regular update messages from inappropriately reinstating a route that may

have gone bad.

The split horizon rule says that a router should not advertise a network through the interface from which the

update came.

Route poisoning is used to mark the route as unreachable in a routing update that is sent to other routers.

The rule for split horizon with poison reverse states when sending updates out a specific interface, designate any

networks that were learned on that interface as unreachable.

4

What are two reasons for the occurrence of a routing loop? (Choose two.)

slow convergence

*incorrectly configured static routes

routes that are learned via two routing protocols

*static and dynamic routing being used on the same router

lack of a default route on the router that connects to the Internet

The loop may be a result of:

Incorrectly configured static routes

Incorrectly configured route redistribution (redistribution is a process of handing the routing information from

one routing protocol to another routing protocol and is discussed in CCNP-level courses)

Inconsistent routing tables not being updated due to slow convergence in a changing network

Incorrectly configured or installed discard routes

5

All routers in a network are configured in a single OSPF area with the same priority value. No loopback interface has been

set on any of the routers. Which secondary value will the routers use to determine the router ID?

The highest MAC address among the active interfaces of the network will be used.

There will be no router ID until a loopback interface is configured.

The highest IP address among the active FastEthernet interfaces that are running OSPF will be used.

*The highest IP address among the active interfaces will be used.

Determining the Router ID

The OSPF router ID is used to uniquely identify each router in the OSPF routing domain. A router ID is simply an IP

address. Cisco routers derive the router ID based on three criteria and with the following precedence:

1. Use the IP address configured with the OSPF router-id command.

2. If the router-id is not configured, the router chooses highest IP address of any of its loopback interfaces.

3. If no loopback interfaces are configured, the router chooses highest active IP address of any of its physical interfaces.

6

Refer to the exhibit. Although R2 is configured correctly, host A is unable to access the Internet. What are two static

routes that can be configured on R1, either of which would enable Internet connectivity for host A? (Choose two.)

ip route 0.0.0.0 0.0.0.0 Fa0/0

*ip route 0.0.0.0 0.0.0.0 Fa0/1

ip route 0.0.0.0 0.0.0.0 10.1.1.1

*ip route 0.0.0.0 0.0.0.0 10.1.1.2

ip route 209.165.202.0 255.255.255.0 10.1.1.1

7

What is the function of the OSPF LSR packet?

It is used to confirm the receipt of LSUs.

It is used to establish and maintain adjacency with other OSPF routers.

*It is used by the receiving routers to request more information about any entry in the DBD.

It is used to check the database synchronization between routers

1. Hello - Hello packets are used to establish and maintain adjacency with other OSPF routers.

2. DBD - The Database Description (DBD) packet contains an abbreviated list of the sending router's link-state database

and is used by receiving routers to check against the local link-state database.

3. LSR - Receiving routers can then request more information about any entry in the DBD by sending a Link-State Request

(LSR).

4. LSU - Link-State Update (LSU) packets are used to reply to LSRs as well as to announce new information. LSUs contain

seven different types of Link-State Advertisements (LSAs). LSUs and LSAs are briefly discussed in a later topic.

5. LSAck - When an LSU is received, the router sends a Link-State Acknowledgement (LSAck) to confirm receipt of the

LSU.

8

Refer to the exhibit. A network administrator is accessing router R1 from the console port. Once the administrator is

connected to the router, which password should the administrator enter at the R1> prompt to access the privileged EXEC

mode?

Cisco001

Cisco123

*Cisco789

Cisco901

9

Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.)

authentication

link-state advertisements

*hold-down timers

Spanning Tree Protocol

*split horizon


have gone bad.


update came.




10

Refer to the exhibit. An administrator is adding a new subnet of 50 hosts to R3. Which subnet address should be used for

the new subnet that provides enough addresses while wasting a minimum of addresses?

192.168.1.0/24

192.168.1.48 /28

192.168.1.32/27

*192.168.1.64/26

11

Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?

The IP address of host A is incorrect.


*The Fa0/1 interfaces of the two routers are configured for different subnets.


12

A network administrator uses the RIP routing protocol to implement routing within an autonomous system. What are two

characteristics of this protocol? (Choose two.)

*It uses the Bellman-Ford algorithm to determine the best path.

It displays an actual map of the network topology.

It offers rapid convergence in large networks.

*It periodically sends complete routing tables to all connected devices.

It is beneficial in complex and hierarchically designed networks.

13

Refer to the exhibit. What is the meaning of the highlighted value 2?

It is the administrative distance of the routing protocol.

*It is the number of hops between R2 and the 192.168.8.0/24 network.

It is the value used by the DUAL algorithm to determine the bandwidth for the link.

It is the convergence time measured in seconds.

14

Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose

two.)

*10.0.0.0/8

64.100.0.0/16

128.107.0.0/16

172.16.40.0/24

192.168.1.0/24

*192.168.2.0/24

Ingat recursive lookup , ingat (via)^_^

15

Refer to the exhibit. The 10.4.0.0 network fails. What mechanism prevents R2 from receiving false update information

regarding the 10.4.0.0 network?

*split horizon

hold-down timers

route poisoning

triggered updates


have gone bad.


update came.




16

Refer to the exhibit. The routers are properly configured using a dynamic routing protocol with default settings, and the

network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path?

*If the network uses the RIP protocol, router A will determine that all paths have equal cost.

If the network uses the RIP protocol, router A will update only the A-C-E path in its routing table.

If the network uses the EIGRP routing protocol, router A will determine that path A-D-E has the lowest cost.

If both RIP and EIGRP protocols are configured on router A, the router will use the route information that is

learned by the RIP routing protocol.

17

Refer to the exhibit. All routers are running the same routing protocol. Based on the exhibit and its displayed commands,

which statement is true?

The wildcard mask is incorrectly configured.

A default route must be configured on every router.

Routers B, C, and D have no access to the Internet.

*The link to the ISP is not advertised by the routing protocol process.

18

Refer to the exhibit. A ping between host A and host B is successful, but pings from host A to operational hosts on the

Internet fail. What is the reason for this problem?

The FastEthernet interface of R1 is disabled.

*One of the default routes is configured incorrectly.

A routing protocol is not configured on both routers.

The default gateway has not been configured on host A.

19

Refer to the exhibit. While trying to diagnose a routing problem in the network, the network administrator runs the debug ip

rip command. What can be determined from the output of this command?

The router is broadcasting RIP updates.

The router will be unable to ping 192.168.1.2.

The router is directly connected to network 172.16.1.0 /24.

*The router has two interfaces that participate in the RIP process.

20

A router boots and enters setup mode. What is the reason for this?

The IOS image is corrupt.

Cisco IOS is missing from flash memory.

*The configuration file is missing from NVRAM.

The POST process has detected hardware failure.

21

Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)

The route to network 172.16.0.0 has an AD of 156160.

Network 192.168.0.16 can best be reached using FastEthernet0/0.

*The AD of EIGRP routes has been manually changed to a value other than the default value.

*Router1 is running both the EIGRP and OSPF routing process.

Network 172.17.0.0 can only be reached using a default route.

*No default route has been configured.

22

A network administrator has enabled RIP on routers B and C in the network diagram. Which of the following commands will

prevent RIP updates from being sent to Router A?


A(config-router)# passive-interface S0/0

B(config)# router rip




A(config-router)# no network 192.168.25.32

*B(config)# router rip

B(config-router)# passive-interface S0/0

A(config)# no router rip

23

Refer to the exhibit. The show cdp neighbors command was run at R1. Which two facts about the newly detected device can

be determined from the output? (Choose two.)

*ABCD is a router that is connected to R1.

ABCD is a non-CISCO device that is connected to R1.

*The device is connected at the Serial0/0/1 interface of R1.

R1 is connected at the S0/0/1 interface of device ABCD.

ABCD does not support switching capability.

24

Which statement is true about the metrics used by routing protocols?

*A metric is a value used by a particular routing protocol to compare paths to remote networks.

A common metric is used by all routing protocols.

The metric with the highest value is installed in the routing table.

The router may use only one parameter at a time to calculate the metric.

25

Refer to the exhibit. What action will R2 take for a packet that is destined for 192.168.2.0?


It will forward the packet via the S0/0/0 interface.

It will forward the packet via the Fa0/0 interface.

*It will forward the packet to R1.

26

Which two router component and operation pair are correctly described? (Choose two.)

DRAM - loads the bootstrap

RAM - stores the operating system

Flash - executes diagnostics at bootup

*NVRAM - stores the configuration file

ROM - stores the backup configuration file

*POST - runs diagnostics on hardware modules

27

Which two statements are true about the EIGRP successor route? (Choose two.)

It is saved in the topology table for use if the primary route fails.

*It may be backed up by a feasible successor route.

*It is used by EIGRP to forward traffic to the destination.

It is flagged as active in the routing table.

After the discovery process has occurred, the successor route is stored in the neighbor table.

28

Refer to the exhibit. Which two facts can be derived from this output? (Choose two.)

*Three network devices are directly connected to Router2.

*The serial interface between Router2 and Router3 is up.

Router1 and Router3 are directly connected.

Six devices are up and running on the network.

Layer 3 functionality between routers is configured properly.

Ilustrasi gambarnya :

29

In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes.

Which route will be used to reach this network?

*D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0

O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0

R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0

I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/0

30

Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a

router? (Choose three.)

*The router modifies the TTL field, decrementing it by one.

The router changes the source IP to the IP of the exit interface.

*The router maintains the same source and destination IP.

*The router changes the source physical address to the physical address of the exit interface.

The router changes the destination IP to the IP of the exit interface.

The router sends the packet out all other interfaces, besides the one it entered the router on.

31

Refer to the exhibit. Both routers are using the RIPv2 routing protocol and static routes are undefined. R1 can ping

192.168.2.1 and 10.1.1.2, but is unable to ping 192.168.4.1.

What is the reason for the ping failure?

The serial interface between two routers is down.


*The 192.168.4.0 network is not included in the RIP configuration of R2.

RIPv1 needs to be configured.

32

Refer to the exhibit. Two routers are unable to establish an adjacency. What is the possible cause for this?


*The hello and dead intervals are different on the two routers.

They have different OSPF router IDs.

They have different process IDs.

33

Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP

routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an

EIGRP neighbor adjacency.

What action should be taken to solve this problem?

Enable the serial interfaces of both routers.



*Configure both routers with the same EIGRP process ID.

34

Refer to the exhibit. R1 and R2 are unable to establish an adjacency. What two configuration changes will correct the

problem? (Choose two.)

Set a lower priority on R2.

*Configure the routers in the same area.

Set a lower cost on R2 compared to R1.

Add a backup designated router to the network.

*Match the hello and dead timers on both routers.

35

Refer to the exhibit. All routers are properly configured to use the EIGRP routing protocol with default settings, and the

network is fully converged. Which statement correctly describes the path that the traffic will use from the 10.1.1.0/24

network to the 10.1.2.0/24 network?

It will use the A-D path only.

It will use the path A-D, and the paths A-C-D and A-B-D will be retained as the backup paths.

It will use all the paths equally in a round-robin fashion.

*The traffic will be load-balanced between A-B-D and A-C-D.

36

Refer to the exhibit. Which router is advertising subnet 172.16.1.32/28?

Router1

Router2

Router3

*Router4

37

Refer to the exhibit. The hosts that are connected to R2 are unable to ping the hosts that are connected to R1. How can this

problem be resolved?

Configure the router ID on both routers.

*Configure the R2 router interfaces for area 0.

Configure a loopback interface on both routers.

Configure the proper subnet masks on the router interfaces.

38

Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are

displayed. All routers are operational and pings are not blocked on this network.

Which ping will fail?

from R1 to 172.16.1.1

from R1 to 192.168.3.1

from R2 to 192.168.1.1

from R2 to 192.168.3.1

39

Refer to the exhibit. Router R2 is configured properly and all interfaces are functional. Router R1 has been installed

recently. Host A is unable to ping host B.

Which procedure can resolve this problem?

Configure a static route on R1 using the IP address of the serial interface on R1.

Configure a default route on R1 with the exit interface Fa0/0 on R1.

*Configure a static route on R1 using the IP address of S0/0/0 on R2.

Configure a default route on R1 using the IP address of Fa0/0 on R2.

40

Refer to the exhibit. To implement the RIPv2 protocol, the network administrator runs the commands as displayed. However,

the show ip protocol command fails to display any output. How can the administrator solve the problem that is indicated by

the lack of output from this command?

Include the default-information originate command.

Include the no auto-summary command.

*Specify the network for which RIP routing has to be enabled.

Implement RIPv2 authentication in the network.

41

Refer to the exhibit. A router learns a route to the 192.168.6.0 network, as shown in the output of the show ip rip database

command. However, upon running the show ip route command, the network administrator sees that the router has installed a

different route to the 192.168.6.0 network learned via EIGRP. What could be the reason for the missing RIP route?

*Compared to RIP, EIGRP has a lower administrative distance.

Compared to EIGRP, RIP has a higher metric value for the route.

Compared to RIP, the EIGRP route has fewer hops.

Compared to RIP, EIGRP has a faster update timer.

42

Refer to the exhibit. A network administrator has configured R1 as shown, and all interfaces are functioning correctly. A

ping from R1 to 172.16.1.1 fails. What could be the cause of this problem?

The serial interface on R1 is configured incorrectly.

*The default route is configured incorrectly.

The default-information originate command must be issued on R1.

Autosummarization must be disabled on R1.

43

Refer to the exhibit. A network administrator wants to reduce the size of the routing table of R1. Which partial routing

table entry in R1 represents the route summary for R2, without including any additional subnets?

10.0.0.0/16 is subnetted, 1 subnets

D 10.5.0.0[90/205891] via 192.168.1.2, S0/0/0


D 10.5.0.0[90/205198] via 192.168.1.2, S0/0/0

*10.0.0.0/22 is subnetted, 1 subnets

D 10.5.0.0[90/205901] via 192.168.1.2, S0/0/0


D 10.5.0.0[90/205001] via 192.168.1.2, S0/0/0

44

Which two statements are true for link-state routing protocols? (Choose two.)

*Routers that run a link-state protocol can establish a complete topology of the network.

Routers in a multipoint network that run a link-state protocol can exchange routing tables.

Routers use only hop count for routing decisions.

*The shortest path first algorithm is used.


45

Refer to the exhibit. Which two components are required to complete the configuration? (Choose two.)

a crossover cable

a DCE device

*a DTE device

a modem

*a V.35 cable

46

Refer to the exhibit. The output of the show ip route command for router R1 is displayed. What action will the router take

for a packet that is destined for 192.168.1.5?

*It will drop the packet.

It will forward the packet to interface Serial0/0/0.

It will determine the route for the packet through a routing protocol.

It will forward the packet to the default gateway.

47

Refer to the exhibit. A network administrator has run the show interface command. The output of this command is

displayed. What is the first step that is required to make this interface operational?

Switch the cable with a known working cable.

*Issue the no shutdown command on the interface.

Configure the interface as a loopback interface.

Set the encapsulation for the interface.

48

What are two tasks that must be completed before two routers can use OSPF to form a neighbor adjacency? (Choose two.)

The routers must elect a designated router.

*The routers must agree on the network type.

*The routers must use the same dead interval.

The routers must exchange link state requests.

The routers must exchange database description packets.

49

Refer to the exhibit. All interfaces are addressed and functioning correctly. The network administrator runs the tracert

command on host A. Which two facts could be responsible for the output of this command? (Choose two.)

The gateway for Host A is missing or improperly configured.

The gateway for Host B is missing or improperly configured.

The entry for 192.168.1.0/24 is missing from the routing table of R1.

*The entry for 192.168.1.0/24 is missing from the routing table of R2.

*The entry for 192.168.2.0/24 is missing from the routing table of R1.


50

Refer to the exhibit. How many routes are ultimate routes?

*3

4

5

7

51

Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?

192.168.1.0/24

192.168.0.0/24

*192.168.0.0/22

192.168.1.0/22

52

How does route poisoning prevent routing loops?

New routing updates are ignored until the network has converged.

*Failed routes are advertised with a metric of infinity.

A route is marked as unavailable when its Time to Live is exceeded.

The unreachable route is cleared from the routing table after the invalid timer expires.

53

What are two functions of a router? (Choose two.)

*It forwards data packets toward their destination.

It forwards the packet to the destination if the TTL value is 0.

It changes the destination IP address of data packets before forwarding them to an exit interface.

It determines the best path based on the destination MAC address.

*It acts as an intersection between multiple IP networks.

54

Which two components are used to determine the router ID in the configuration of the OSPF routing process? (Choose two.)

the IP address of the first FastEthernet interface

the highest IP address of any logical interface

*the highest IP address of any physical interface

the default gateway IP address

*the priority value of 1 on any physical interface

55

Refer to the exhibit. R2 is configured correctly. The network administrator has configured R1 as shown. Which two facts

are true about the forwarding of route information by R1? (Choose two.)

*R1 will forward the route information for subnet 192.168.100.0/30.

*R1 will not forward route information for subnet 192.168.100.4/30.

R1 will forward the route information with an administrative distance set to 50.

R1 will forward the summarized route information for network 192.168.100.0/24.

R1 will forward route information for subnet 10.10.10.0/30 out the serial interface.

56


*All routes are stable.




*The show ip eigrp topology command has been run on R1.

57

A router has learned two equal cost paths to a remote network via the EIGRP and RIP protocols. Both protocols are using

their default configurations. Which path to the remote network will be installed in the routing table?

*the path learned via EIGRP

the path learned via RIP

the path with the highest metric value

both paths with load balancing

58

Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All

devices are properly configured and the destination network is advertised by both protocols.


*The packets will travel via R2-R1.



The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.

59

Which statement is true about the RIPv1 protocol?

It is a link-state routing protocol.

*It excludes subnet information from the routing updates.

It uses the DUAL algorithm to insert backup routes into the topology table.

It uses classless routing as the default method on the router.




































1. What are two functions of a router? (Choose two.)

It connects multiple IP networks. It controls the flow of data via the use of Layer 2 addresses. It determines the best path to send packets. It manages the VLAN database. It increases the size of the broadcast domain 2. When a router boots, what is the default order to locate the Cisco IOS if there is no boot system command? ROM, TFTP server, flash flash, TFTP server, ROM flash, NVRAM, TFTP server NVRAM, TFTP server, flash 3. Which router component is used to store the routing table? Flash NVRAM ROM SDRAM 4. Refer to the exhibit. How many routes are child routes?

1 3 4 6 5. Refer to the exhibit. Which statement is true concerning the routing configuration? Using dynamic routing instead of static routing would have required fewer configuration steps. The 10.1.1.0/24 and 10.1.2.0/24 routes have adjacent boundaries and should be summarized. Packets routed to the R2 Fast Ethernet interface require two routing table lookups. The static route will not work correctly

6. Refer to the exhibit. The network administrator issues the command no ip classless on Router1. What forwarding action will take place on a packet that is received by Router1 and is destined for host 192.168.0.26?

The packet will be dropped. The packet will be forwarded to the gateway of last resort. The packet will match the 192.168.0.0 network and be forwarded out Serial 0/0. The packet will most closely match the 192.168.0.8 subnet and be forwarded out Serial 0/1 7. Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols. Which path will be used to transmit the data packets between PC1 and PC2? The packets will travel via R2-R1. The packets will travel via R2-R3. The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3. The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path 8. Refer to the exhibit. Router R1 is configured as shown in the exhibit. PC1 on 172.16.1.0/24 network can reach the default gateway on R1. The rest of the routers are configured with the correct IP addresses on the interfaces. Routers R2 and R3 do not have static or dynamic routing enabled. How far will PC1 be able to successfully ping?

router R1 Fa0/0 interface

router R1 S0/0/0 interface router R2 S0/0/0 interface router R2 Fa0/0 and S0/0/1 interfaces router R3 Fa0/0 and S0/0/0 interfaces 9. Refer to the exhibit. All routers are properly configured to use the EIGRP routing protocol with default settings, and the network is fully converged. Which statement correctly describes the path that the traffic will use from the 10.1.1.0/24 network to the 10.1.2.0/24 network?

It will use the A-D path only. It will use the path A-D, and the paths A-C-D and A-B-D will be retained as the backup paths. It will use all the paths equally in a round-robin fashion. The traffic will be load-balanced between A-B-D and A-C-D. 10. Which two statements are true regarding link-state routing protocols? (Choose two.) They are aware of the complete network topology. They offer rapid convergence times in large networks. They do not include subnet masks in their routing updates. They rely on decreasing hop counts to determine the best path. They do not work well in networks that require special hierarchical designs. They pass their entire routing tables to their directly connected neighbors only

11. Refer to the exhibit. R1 knows two routes, Path A and Path B, to the Ethernet network attached to R3. R1 learned Path A to network 10.2.0.0/16 from a static route and Path B to network 10.2.0.0/16 from EIGRP. Which route will R1 install in its routing table?

Both routes are installed and load balancing occurs across both paths. The route via Path B is installed because the EIGRP route has the best metric to network 10.2.0.0/16. The route via Path A is installed because the static route has the best metric to network 10.2.0.0/16. The route via Path B is installed because the EIGRP route has the lowest administrative distance to network 10.2.0.0/16. The route via Path A is installed because the static route has the lowest administrative distance to network 10.2.0.0/16. 12. What two routing protocols use a hierarchal network topology? (Choose two.) IS-IS EIGRP OSPF RIPv1 RIPv2 13. Refer to the exhibit. Based on the output from the show running-config and debug ip rip commands, what are two of the routes that are added to the routing table of R1? (Choose two.)

R 192.168.1.0/24 [120/1] via 172.16.2.1, 00:00:24, Serial0/0/1 R 192.168.100.0/24 [120/1] via 172.16.1.1, 00:00:24, Serial0/0/0 S 192.168.1.0/24 [1/0] via FastEthernet0/0 R 192.168.9.0/24 [120/1] via 172.16.2.1, 00:00:24, Serial0/0/0 R 192.168.2.0/24 [120/1] via 172.16.1.2, 00:00:24, Serial0/0/0

14. Refer to the exhibit. The network has three connected routers: R1, R2 and R3. The routes of all three routers are displayed. What can be verified from the output?

R1 and R3 are connected to each other via the S0/0/0 interface. The IP address of the S0/0/0 interface of R1 is 10.1.1.2. The IP address of the S0/0/1 interface of R2 is 10.3.3.2. R2 is connected to the S0/0/1 interface of R3. 15. Refer to the exhibit. All router interfaces are configured with an IP address and are operational. If no routing protocols or static routes are configured, what information will be included in the show ip route command output for router A?

All of the 192.168.x.0 networks will be in the routing table. Routes to networks 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24 will be in the routing table. The routing table will be empty because routes and dynamic routes have not been configured. A default route is automatically installed in the routing table to allow connectivity between the networks. 16. Refer to the exhibit. A network administrator is accessing router R1 from the console port. Once the administrator is connected to the router, which password should the administrator enter at the R1> prompt to access the privileged EXEC mode?

Cisco001 Cisco123 Cisco789 Cisco901 17. Which of the following could describe the devices labeled "?" in the graphic? (Choose three.)

DCE CSU/DSU LAN switch modem hub 18. Refer to the exhibit. Which router is advertising subnet 172.16.1.32/28?

Router1

Router2 Router3 Router4 19. Refer to the exhibit. The show cdp neighbors command was run at R1. Which two facts about the newly detected device can be determined from the output? (Choose two.)

ABCD is a router that is connected to R1. ABCD is a non-CISCO device that is connected to R1. The device is connected at the Serial0/0/1 interface of R1. R1 is connected at the S0/0/1 interface of device ABCD. ABCD does not support switching capability. 20. A static route has been configured on a router. However, the destination network no longer exists. What should an administrator do to remove the static route from the routing table? Change the routing metric for that route. Nothing. The static route will go away on its own. Change the administrative distance for that route. Remove the route using the no ip route command. 21. Refer to the exhibit. A ping between host A and host B is successful, but pings from host A to operational hosts on the Internet fail. What is the reason for this problem?

The FastEthernet interface of R1 is disabled. One of the default routes is configured incorrectly.

A routing protocol is not configured on both routers. The default gateway has not been configured on host A. 22. Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are displayed. All routers are operational and pings are not blocked on this network. Which ping will fail?

from R1 to 172.16.1.1 from R1 to 192.168.3.1 from R2 to 192.168.1.1 from R2 to 192.168.3.1 23. Refer to the exhibit. What action will R2 take for a packet that is destined for 192.168.2.0? It will drop the packet.

It will forward the packet via the S0/0/0 interface. It will forward the packet via the Fa0/0 interface. It will forward the packet to R1

24. Refer to the exhibit. The users on the local network 172.16.1.0/24 complain that they are unable to connect to the Internet. What step should be taken to remedy the problem?

A new static route must be configured on R1 with the R3 serial interface as the next hop. A new default route must be configured on R1 with the R3 serial interface as the next hop. The default route on R2 should be configured with the R3 serial interface as the next hop. The default route on R2 must be replaced with a new static route and the next hop should be the R1 FastEthernet interface 25. Refer to the exhibit. What summary address can Router2 advertise to Router1 to reach the three networks on Routers 3, 4, and 5 without advertising any public address space or overlapping the networks on Router1?

172.16.0.0/8 172.16.0.0/10 172.16.0.0/13 172.16.0.0/20 172.16.0.0/24 26. Refer to the exhibit. Host A is unable to access the Internet, and troubleshooting has revealed that this is due to an addressing problem. What is incorrectly configured in this network?

the IP address of the Fa0/0 interface of R1 the subnet mask of the S0/0/0 interface of R1 the IP address of the S0/0/0 interface of R1 the subnet mask of the S0/0/0 interface of R2

27. Refer to the exhibit. A new PC was deployed in the Sales network. It was given the host address of 192.168.10.31 with a default gateway of 192.168.10.17. The PC is not communicating with the network properly. What is the cause?

The default gateway is incorrect. The address is in the wrong subnet. The host address and default gateway are swapped. 192.168.10.31 is the broadcast address for this subnet 28. Refer to the exhibit. The network administrator is planning IP addressing of a new network. What part of this addressing scheme must be changed to allow communication between host A and the server?

the IP address of the server the default gateway of host A the IP address of host A the default gateway of the server

29. Which network design feature requires the deployment of a classless routing protocol? private IP addressing advertising default routes variable length subnet masks summarization on major network boundaries 30. A network administrator needs to assign the very last usable IP address in the 172.24.64.0/18 network range to the router interface that serves this LAN. Which IP address should the administrator configure on the interface? 172.16.128.154/18 172.16.255.254/18 172.24.64.254/18 172.24.127.254/18 31. Refer to the exhibit. All routers are running RIPv1. The two networks 10.1.1.0/29 and 10.1.1.16/29 are unable to access each other. What can be the cause of this problem?

Because RIPv1 is a classless protocol, it does not support this access. RIPv1 does not support discontiguous networks. RIPv1 does not support load balancing. RIPv1 does not support automatic summarization. 32. Refer to the exhibit. What information can be determined from the highlighted output?

R1 is originating the route 172.30.200.32/28.

Automatic summarization is disabled. The 172.30.200.16/28 network is one hop away from R1. A classful routing protocol is being used 33. What does RIP use to reduce convergence time in a larger network? It uses multicast instead of broadcast to send routing updates. It reduces the update timer to 15 seconds if there are more than 10 routes. It uses triggered updates to announce network changes if they happen in between the periodic updates. It uses random pings to detect if a pathway is down and therefore is preemptive on finding networks that are down 34. A network administrator has enabled RIP on routers B and C in the network diagram. Which of the following commands will prevent RIP updates from being sent to Router A?

A(config)# router rip A(config-router)# passive-interface S0/0 B(config)# router rip B(config-router)# network 192.168.25.48 B(config-router)# network 192.168.25.64 A(config)# router rip A(config-router)# no network 192.168.25.32 B(config)# router rip B(config-router)# passive-interface S0/0 A(config)# no router rip 35. Refer to the exhibit. Both routers are using the RIP protocol. Devices on the 192.168.1.1 network can ping the S0/0/0 interface on R2 but cannot ping devices on the 192.168.2.1 network.

What is a possible cause of this problem? The routers are configured with different versions of RIP. R2 is not forwarding the routing updates. The R1 configuration should include the no auto-summary command. The maximum path number has been exceeded. 36. Which two statements are correct about the split horizon with poison reverse method of routing loop prevention? (Choose two.) It is enabled by default on all Cisco IOS implementations. It assigns a value that represents an infinite metric to the poisoned route. It sends back the poisoned route update to the same interface from where it was received. It instructs routers to hold all changes that might affect routes, for a specified period of time. It limits the number of hops a packet can traverse through the network before it is discarded 37. Refer to exhibit. Given the topology shown in the exhibit, what three commands are needed to configure EIGRP on the Paris router? (Choose three.)

Paris(config)# router eigrp 100 Paris(config)# router eigrp Paris(config-router)# network 192.168.6.0 Paris(config-router)# network 192.168.7.0 Paris(config-router)# network 192.168.8.0 Paris(config-router)# network 192.168.9.0 38. A router has EIGRP configured as the only routing protocol. In what way might EIGRP

respond if there is no feasible successor route to a destination network and the successor route fails? It broadcasts hello packets to all routers in the network to re-establish neighbor adjacencies. It sends queries to adjacent neighbors until a new successor route is found. It immediately sends its entire routing table to its neighbors. It will set the metric for the failed route to infinity. 39. Refer to the exhibit. Hosts on the BOS Fa0/0 LAN are able to ping the Fa0/1 interface on the JAX router and all interfaces on the BOS and ORL routers. Why would hosts from the 10.0.0.0/24 network not be able to ping hosts on the Fa0/0 LAN of the JAX router?

The JAX router has the wrong process ID. The JAX router needs the network 10.0.0.0 0.0.0.255 area 0 command. The JAX router needs the network 192.168.3.0 0.0.0.255 area 0 command. The BOS router needs the network 192.168.3.0 0.0.0.255 area 0 command 40. Which three statements describe the operation of routing with EIGRP? (Choose three.) As new neighbors are discovered, entries are placed in a neighbor table. If the feasible successor has a higher advertised cost than the current successor route, then it becomes the primary route. If hello packets are not received within the hold time, DUAL must recalculate the topology. The reported distance is the distance to a destination as advertised by a neighbor. EIGRP maintains full knowledge of the network topology in the topology table and exchanges full routing information with neighboring routers in every update. EIGRP builds one routing table that contains routes for all configured routed protocols. 41. Refer to the exhibit. What happens to a packet that has 172.16.0.0/16 as the best match in the routing table that is shown?

The packet is discarded. The packet is flooded out all interfaces. The packet is forwarded via Serial0/0/0.

The packet is forwarded via FastEthernet0/0. 42. A network is configured with the IP, IPX, and AppleTalk protocols. Which routing protocol is recommended for this network? RIPv1 RIPv2 EIGRP OSPF 43. Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)

Automatic summarization is disabled. The EIGRP routing protocol is being used. There is one feasible successor in the routing table. The serial interface S0/0/0 is administratively down. The router is originating the route to 172.16.1.0/24 via the S0/0/0 interface 44. Refer to the exhibit. Two routers are unable to establish an adjacency. What is the possible cause for this?


The hello and dead intervals are different on the two routers. They have different OSPF router IDs. They have different process IDs

45. What command would the network administrator apply to a router that is running OSPF to advertise the entire range of addresses included in 172.16.0.0/19 in area 0? R1(config-router)# network 172.16.0.0 0.0.0.255 area 0 R1(config-router)# network 172.16.0.0 0.0.3.255 area 0 R1(config-router)# network 172.16.0.0 0.0.15.255 area 0 R1(config-router)# network 172.16.0.0 0.0.31.255 area 0 46. What should be considered when troubleshooting a problem with the establishment of neighbor relationships between OSPF routers? (Choose two.) OSPF interval timers mismatch administrative distance mismatch interface network type mismatch no loopback interface configured gateway of last resort not redistributed 47. Which two components are used to determine the router ID in the configuration of the OSPF routing process? (Choose two.) the IP address of the first FastEthernet interface the highest IP address of any logical interface the highest IP address of any physical interface the default gateway IP address the priority value of 1 on any physical interface 48. What is the function of the OSPF LSR packet? It is used to confirm the receipt of LSUs. It is used to establish and maintain adjacency with other OSPF routers. It is used by the receiving routers to request more information about any entry in the DBD. It is used to check the database synchronization between routers. 49. Refer to the exhibit. All interfaces are configured with the correct IP addresses and subnet masks. OSPF has been configured as the routing protocol. During troubleshooting, it is determined that hosts on network B can ping the Lo0 interface on R1 but are unable to reach hosts on network A. What is the cause of the problem?

Routers R1 and R2 have incorrect router IDs configured. Router R1 is unable to form a neighbor relationship with router R2. Routers R1 and R2 have been configured in different OSPF areas. The configuration of router R1 fails to include network A in the OSPF routing process 50. Refer to the exhibit. The interface addresses and OSPF priorities are configured as shown. Because of the boot order of the routers, router A is currently the DR and router B is the BDR. If router A fails and is replaced the next day by a new router, router D, what OSPF protocol action or actions will happen?

Router D will be elected DR, and router C will become the BDR. Router D will be elected DR, and router B will remain the BDR. Router C will become the DR, and router B will become the BDR. Router B will remain the BDR, and OSPF will function on the segment via the use of only the BDR

Chapter 10

1. What action does a link-state router take immediately upon receipt of an LSP from a neighboring router?

floods the LSP to neighbors

calculates the SPF algorithm

runs the Bellman-Ford algorithm

computes the best path to the destination network

2. Why is it difficult for routing loops to occur in networks that use link-state routing?

Each router builds a simple view of the network based on hop count.

Routers flood the network with LSAs to discover routing loops.

Each router builds a complete and synchronized view of the network.

Routers use hold-down timers to prevent routing loops.

3.

Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL?

hop count

uptime of the route

cost of the link

a list of all the routing protocols in use

4. To achieve network convergence, what three steps does each link state router take? (Choose three.)

use automatic summarization to reduce the size of routing tables

build a Link State Packet (LSP) containing the state of each directly connected link

flood the LSP to all neighbors, who then store all LSPs received in a database

discover neighbors and establish adjacencies using the hello packet sent at regular intervals

construct a complete map of the topology and compute the best path to each destination network

use the DUAL FSM to select efficient, loop-free paths, and insert routes into the routing table

5.

Refer to the exhibit. When Router D is configured to use a link-state routing protocol and is added to the network, what is the first thing that it does to begin learning the network topology?

It sends LSP packets to Routers B and C.

It sends LSP packets to all routers in the network.

It sends Hello packets to all routers in the network.

It sends information about its directly connected neighbors to Routers A and E.

It sends information about its directly connected neighbors to all routers in the network.

It learns about its directly connected networks when its interfaces reach the up state.

6. A new network administrator is given the task of selecting an appropriate dynamic routing protocol for a software development company. The company has over 100 routers, uses CIDR and VLSM, requires fast convergence, and uses both Cisco and non-Cisco equipment. Which routing protocol is appropriate for this company?

RIP version 2

IGRP

EIGRP

OSPF

BGP

7. What two events will cause a link state router to send LSPs to all neighbors? (Choose two.)

30 second timer expires

whenever the network topology changes

immediately after the Bellman-Ford algorithm has run

immediately after the DUAL FSM has built the topology database

upon initial startup of router or routing protocol

8. What is the final step in the link state routing process?

successors are placed into the routing table

SPF computes best path to each destination network

LSPs are flooded to all neighbors to converge the network

DUAL algorithm is run to find best path to destination networks

9.

Refer to the exhibit. What does JAX do with link-state packets from ORL?

sends out its updated routing table to both ORL and BOS routers

sends out the individual link-state packets out the interface connected to BOS

queries BOS to see if it has a better route

only adds it to the local routing table and performs no other actions

10. What two statements correctly describe the link state routing process? (Choose two.)

each router in the area floods LSPs to all neighbors

all routers in the area have identical link state databases

LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors

routing loops are prevented by running the Diffusing Update Algorithm (DUAL)

Reliable Transport Protocol (RTP) is the protocol used by for the delivery and reception of LSPs

11. Which database or table must be identical on all link-state routers within an area in order to construct an accurate SPF tree?

routing table

adjacency table

link-state database

neighbor table

topology database

12.

Refer to the exhibit. Which statement correctly describes the path traffic would take from the 10.0.0.0/24 network to the 192.168.1.0/24 network if a link-state routing protocol was in use?

BOS -> ATL because this path is the least hops

BOS -> ATL because this path is highest cost

BOS -> ORL -> JAX -> ATL because this path is the lowest cost

traffic would load balance across all links

13. What feature do modern link-state protocols provide to minimize processing and memory requirements?

splitting routing topologies into smaller areas

assigning lower process priorities to route calculations

using update timers to restrict routing updates

strict split horizon rules to reduce routing table entries

14. What speeds up convergence in a network using link-state routing?

updates triggered by network changes

updates sent at regular intervals

updates sent only to directly connected neighbors

updates that include complete routing tables

15. Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks?

DUAL

Dijkstra

Bellman-Ford

Diffie-Hellman

16. What are some of the advantages of using a link-state routing protocol instead of a distance vector routing protocol? (Choose two.)

The topology database eliminates the need for a routing table.

Frequent periodic updates are sent to minimize the number of incorrect routes in the topological database.

Routers have direct knowledge of all links in the network and how they are connected.

After the inital LSA flooding, they generally require less bandwidth to communicate changes in a topology.

Link-state protocols require less router processor power than distance vector protocols.

17.

Refer to the exhibit. If all routers and interfaces are configured to use a link-state routing protocol, from which routers will router D receive hello packets?

A and E

B and C

A, B, C, and E

C only

18. Which two routing protocols use Dijkstra’s shortest path first algorithm? (Choose two.)

RIPv1

RIPv2

IS-IS

BGP

EIGRP

OSPF

19. When are link-state packets sent to neighbors?

every 30 seconds

every 180 seconds

after the holddown time expires

when a link goes up or down

when a routing loop occurs

20. What are two advantages of using a link-state routing protocol instead of a distance vector routing protocol? (Choose two.)

The topology database eliminates the need for a routing table.

Each router independently determines the route to each network.

Link-state protocols require less router processor power than distance vector protocols.

After the inital LSP flooding, they generally require less bandwidth to communicate changes in a topology.

Frequent periodic updates are sent to minimize the number of incorrect routes in the topological database.

21. To achieve network convergence, what three steps does each link state router take? (Choose three.)

use automatic summarization to reduce the size of routing tables

build a Link State Packet (LSP) containing the state of each directly connected link

flood the LSP to all neighbors, who then store all LSPs received in a database

send hello packages at regular intervals to discover neighbors and establish adjacencies

construct a complete map of the topology and compute the best path to each destination network

use the DUAL FSM to select efficient, loop-free paths, and insert routes into the routing table

CHAPTER 9

1. What two actions will the EIGRP DUAL FSM take if a link to a network goes down? (Choose two.)

put the route into passive mode

query neighbors for a new route

search routing table for a feasible successor

run the SPF algorithm to find a new successor

search topology table for a feasible successor

2.

Host 192.168.1.66 in the network illustrated is unable to ping host 192.168.1.130. How must EIGRP be configured to enable connectivity between the two hosts? (Choose two.)

R1(config-router)# network 192.168.1.128

R1(config-router)# auto-summary

R1(config-router)# no auto-summary

R2(config-router)# no auto-summary

R2(config-router)# auto-summary

R2(config-router)# network 192.168.1.64

3.

Refer to the exhibit. The company is using EIGRP with an autonomous system number of 10. Pings between hosts on networks that are connected to router A and those that are connected to router B are successful. However, users on the 192.168.3.0 network are unable to reach users on the 192.168.1.32 network. What is the most likely cause of this problem?

IP classless is enabled and is causing the packet to drop.

The command network 192.168.1.32 was not issued on router C.

The routers are not configured in the same EIGRP routing domain.

Automatic summarization of the networks is causing the subnetted routes to be dropped.

4. What information is maintained in the EIGRP topology database for a destination route? (Choose three.)

the routing protocol

the feasible distance of the route

the highest cost of the route

the SRTT value for the route

the route cost as advertised by the neighboring router

the physical address of the gateway interface

5. On a router running EIGRP, what database would maintain a list of feasible successors?

routing table

neighbor table

topology table

adjacency table

6.

Refer to the exhibit. What is indicated by the P at the beginning of the topology entry?

the route is in a stable state

the route is a preferred route

DUAL is searching for a better route to this destination

the exit interface is in passive mode and EIGRP advertisements are blocked

7. In the command router eigrp 20, what is the purpose of the number 20?

specifies the administrative distance for all EIGRP routes

identifies the autonomous system number this EIGRP process will advertise

determines what metric is added to all advertised routes

indicates the number of addresses in the EIGRP routing domain

8.

Refer to the exhibit. In the topology table, what do the numbers 3011840 and 3128695 represent?

the route metric that is applied to those EIGRP routes for this router

the trustworthiness of the routing information source

the composite of the hop count and bandwidth to that destination network

the total metric for that network as advertised by the EIGRP neighbor

9. Which two statements describe characteristics of EIGRP? (Choose two.)

EIGRP is a distance vector routing protocol.

EIGRP supports classless routing and VLSM.

EIGRP is classified as a link-state routing protocol.

EIGRP uses TCP for reliable delivery of EIGRP update packets.

With EIGRP, loop-free paths are achieved through the use of hold-down timers.

EIGRP sends a periodic update every 30 minutes.

10.

Refer to the exhibit. Network 192.168.0.0/28 goes down. What type of packet does Router2 immediately send to Router1 and Router3?

a query for network 192.168.0.0/28

an acknowledgment packet to 224.0.0.9

an update packet that is sent to 255.255.255.255

a packet that contains the new routing table for R2

unicast update packets to 192.168.1.1 and 192.168.2.1

11.

Refer to the exhibit. Which command will advertise the 192.168.1.64/30 network but not the 192.168.1.32 network on router A?

network 192.168.1.0

network 192.168.1.0 255.255.255.0

network 192.168.1.64 0.0.0.3

network 192.168.1.64 0.0.0.7

network 192.168.1.64 0.0.0.255

12. What administrative distance would a router assign to a default route in EIGRP that is learned from a source external to the autonomous system?

1

5

70

90

170

190

13. In which of the following tables does the EIGRP DUAL algorithm store the primary route to a destination? (Choose two.)

routing

topology

neighbor

path

shortest path

14. Which of the following types of routes will be denoted by EX in EIGRP routing table entries? (Choose two.)

routes learned from other routing protocols

routes learned from any non-adjacent EIGRP routers

any route with a hop count metric higher than 224

EIGRP routes that originate in different autonomous systems

all passive routes in the routing table

15. Which term defines a collection of networks under the administrative control of a single entity that presents a common routing policy to the Internet?

autonomous system

contiguous networks

process ID

BGP

16.

Refer to the exhibit. EIGRP is the only routing protocol enabled on this network. No static routes are configured on this router. What can be concluded about network 198.18.1.0/24 from the exhibited output?

A route to network 198.18.1.0/24 is not listed in the routing table.

Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6.

EIGRP will perform equal cost load balancing across two paths when forwarding packets to 198.18.1.0/24.

The router with interface 172.16.3.2 is a successor for network 198.18.1.0/24.

17.

Refer to the exhibit. All interfaces have been configured with the bandwidths that are shown in the exhibit. Assuming that all routers are using a default configuration of EIGRP as their routing protocol, what path will packets take from the 172.16.1.0/16 network to the 192.168.200.0/24 network?

A,B,E

A,C,E

A,D,E

Packets will load balance across the A,B,E and A,C,E paths.

Packets will load balance across the A,B,E and A,D,E paths.

Packets will load balance across the A,C,E and A,D,E paths.

18. By default, which two metrics are used by EIGRP to determine the best path between networks?

MTU

load

delay

bandwidth

reliability

19. Which of the following statements describes the bounded updates used by EIGRP?

Bounded updates are sent to all routers within an autonomous system.

Partial updates are sent only to routers that need the information.

The updates are sent to all routers in the routing table.

Updates are bounded by the routers in the topology table.

20. The show ip eigrp topology command output on a router displays a successor route and a feasible successor route to network 192.168.1.0/24. In order to reduce processor utilization, what does EIGRP do when the primary route to this network fails?

The router sends query packets to all EIGRP neighbors for a better route to network 192.168.1.0/24.

The DUAL FSM immediately recomputes the algorithm to calculate the next backup route.

Packets that are destined for network 192.168.1.0/24 are sent out the default gateway instead.

The backup route to network 192.168.1.0/24 is installed in the routing table.

21.

Refer to the exhibit. Based on the output of show ip eigrp neighbors, what are two possible problems with adjacencies between Router1 and Router2? (Choose two.)

The routers are configured with different EIGRP process IDs.

Automatic summarization was disabled.

The hello timer for R1 was altered.

The serial interfaces for both routers are in different networks.

No feasible successors were found.

22.

Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They are not forming an adjacency. What is the cause?

one router is a non-cisco router

they have different autonomous-system numbers

they are using difference sequence numbers

they are sending incorrect hello types

CHAPTER 8

1.

Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?

drop the packet

forward the packet via the route to 10.16.1.0

forward the packet via the route to 10.16.1.64

use the default route

2. A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table?

the route with the smallest AD

the route with the longest address and mask match to the destination

the route with the highest bandwidth

the route with the best combination of AD and lowest cost

3.

Refer to the exhibit. Which statement correctly describes this network?

EIGRP is being used

There is at least one parent and one child route

192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes

Traffic going to 172.16.3.0 will be directed to s 0/0/1

4.

Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10?

they are dropped

sent to default gateway

forward out interface Serial0/0/1

forward out interface FastEthernet 0/0

5. The following entry is displayed in the routing table: R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1 What type of route is this?

a level 1 parent route

a level 1 supernet route

a level 1 ultimate network route

a level 2 child route

a level 2 ultimate child route

6. What determines if the router implements a classless route lookup process?

Child routes are present in the routing table.

A classless routing protocol has been configured on the router.

The command ip classless is enabled on the router.

Multiple routes with different masks to the same destination are in the routing table.

Routing table entries have a next-hop IP address and an exit interface for each child route.

7.

Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?

3

4

5

6

7

8.

Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4?

RIPv1

RIPv2

EIGRP

OSPF

9.

Refer to the exhibit. What can be determined from this output?

The router will have to perform recursive lookups to forward a packet destined for 192.168.2.213/24.

The parent route for these networks was removed from the routing table.

A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in the routing table.

All of the routes listed are network routes.

10.

Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet to forward. Which route in the routing table will be searched first and why?

172.16.1.0/25 because it is the first ultimate route

0.0.0.0/0 because it is the lowest network number

172.16.0.0/25 because it is the first level 1 route

172.18.0.0/15 because it has the shortest mask

11.

Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator need to do so that packets for unknown child routes of 172.16.0.0/24 will not be dropped?

issue the ip default-network command

use a classful routing protocol such as RIPv1

enable either OSPF or ISIS as the routing protocol

issue the ip classless command

do nothing, ip classless is on by default

12.

Refer to the exhibit. With the ip classless command issued, what will router R2 do with a packet destined for host 172.16.4.234?

drop the packet

send packet out Serial 0/0/1

send packet to network 0.0.0.0

send packet out FastEthernet 0/0

13. A router has the following entries in its routing table: S 192.168.0.0/24 [1/0] via 192.168.128.2 O 192.168.0.0/25 [110/2175] via 172.16.1.1, 00:02:15, FastEthernet0/1 D 192.168.0.0/25 [90/22455] via 172.16.2.2, 00:12:15, Serial0/0/0 R 192.168.0.0/26 [120/2] via 172.16.3.3, 00:00:15, Serial0/0/1 The router receives a packet that is destined for a host with the address 192.168.0.58. Which route would this router use to forward the packet?

the static route

the OSPF route

the EIGRP route

the RIP route

14.

Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?

172.16.0.0/16

172.16.0.0/24

172.16.0.0/30

172.16.1.0/16

172.16.1.0/24

15.

Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network?

0.0.0.0

255.255.0.0

255.255.255.0

255.255.255.255

16.

Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being dropped by Router2. What command

should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1?

ip classless

no ip classless

ip default-network 0.0.0.0

ip default-gateway 172.16.254.1

ip route 0.0.0.0 0.0.0.0 Serial 0/0/1

17.

Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the static route in the routing table that matches the destination network for this packet, what does the router do next?

searches for a default route to forward the packet

drops the packet since the static route does not have an exit interface

performs a recursive lookup to find the exit interface used to forward the packet

sends a request to neighboring routers for the location of the 128.107.0.0 network

18. What occurs when no ip classless is implemented on the router?

The router will only support classful IP addressing.

The router will only support classful routing protocols.

The router will use a default route, if present, when a matching route is not found in the routing table.

The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.

19. A route to a destination network is learned from multiple routing protocols. What is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table?

metric

route prefix

update timer

administrative distance

CHAPTER 7

1. A network administrator has been told that the company IP address infrastructure must adhere to RFC 1918. What three IP address ranges from RFC 1918 could the administrator use on the network? (Choose three.)

10.0.0.0/8

127.0.0.0/8

169.254.0.0/16

172.16.0.0/12

192.168.0.0/16

209.165.201.0/27

2.

Refer to the exhibit. Routers East and West are configured using RIPv1. Both routers are sending updates about their directly connected routes. The East router can ping the West router serial interface and West can ping the serial interface of East. However, neither router has dynamically learned routes from the other. What is most likely the problem?

A gateway of last resort is required.

Subnetting is not supported by RIPv1.

VLSM is not supported by RIPv1.

One of the routers needs a clock rate on the serial interface.

3.

Refer to the exhibit. What effect will the commands that are shown have on RIP updates for Router1?

Only version 2 updates are sent to 255.255.255.255.

Only version 2 updates are sent to 224.0.0.9.

Both version 1 and version 2 updates are sent to 224.0.0.9.

Both version 1 and version 2 updates are sent to 255.255.255.255.

4.

Refer to the exhibit. What can be concluded from the output shown in the exhibit?

The routing table is limited to 2 routes.

The LAN interfaces are participating in the routing process.

One update has been sent out of each serial interface and 2 have been received.

The no auto-summary has not been configured on this router.

5. What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.)

RIP version 2 supports VLSM.

RIP version 2 supports more than 16 routers.

RIP version 2 supports classful (and not classless) routing.

RIP version 2 supports routing update authentication.

RIP version 2 supports multi-areas.

RIP version 2 uses the Dijkstra algorithm rather than the Bellman-Ford algorithm.

6.

Refer to the exhibit. RIPv1 is configured as the routing protocol for the network that is shown. The following commands are used on each router: router rip network 10.0.0.0 network 172.16.0.0 When this configuration is complete, users on the LAN of each router are unable to access the remote LANs. Why?

The network statements are configured incorrectly.

A routing loop has been created.

RIPv1 is unable to route to discontiguous subnets of a major network.

RIPv1 is unable to route networks with a /24 subnet mask.

7. A network administrator installed four new routers that are running RIPv2. Router1 is a boundary router in the RIPv2 network and has a default route configured. Once the

network has converged, the network administrator enters Router1(config-router)# default-information originate on Router1. How will this affect the network?

prevents Router1 from forwarding updates about networks that are not directly connected

causes all routers in the network to synchronize routing updates with Router1

forces Router1 to become the primary or designated router (DR) for updates

propagates the default route to all routers in the network

8.

Refer to the exhibit. A technician needs to add a new loopback interface to test routing functionality and network design. The technician enters the following set of commands on the router: Sanford(config)# interface loopback1 Sanford(config-if)# ip address 192.168.6.62 255.255.255.252 Why does the router respond with an error?

The router does not allow loopback interface configurations.

This mask can not be used with this class of addresses.

Classless routing must be configured before this address can be added.

The network address for Loopback1 overlaps with an already configured interface address.

The router is over the limit for the maximum paths that can be provided in the routing table.

9. What is the maximum network diameter permitted by the default metric of RIPv2?

15 hops

16 hops

100 hops

120 hops

255 hops

10. What are two functions of the network command used when configuring routing protocols? (Choose two.)

identifies which networks will be included in the routing updates

identifies the hosts addresses that can be summarized in the network

used to list all addresses for remote and local networks

determines which subnet mask to apply to routing updates

determines which interfaces can send and receive routing updates

11.

Refer to the exhibit. All routers are running RIPv1. What changes will occur in the routing table of router B if a loopback interface with an address of 10.16.1.129/27 is configured on router B?

Routes to the 10.16.1.0/27, 10.16.1.64/27, and 10.16.1.128/27 networks are added.

A connected route to the 10.16.1.128/27 network is added.

A third route to the 10.0.0.0/8 network with RIPv1 as the source is added.

The 10.0.0.0/8 route is dropped immediately from the routing table after router B is configured.

12.

Refer to the exhibit. If all routers are running RIP version 2, why is there no route for the 192.168.1.32/27 network?

Rip version 2 does not send subnet masks in its updates.

Router A is not setup with RIP as a routing protocol.

Rip version 2 will auto summarize routes by default.

Router B is not setup to advertise the 192.168.1.64/30 network.

13. RIPv2 is the configured routing protocol on the routers in a network. The command Router(config-router)# no version 2 is entered on the routers. What effect does entering this command have on routing updates?

Subnet masks will be added to the routing updates.

Routing updates will be sent out using multicast address 224.0.0.9.

Version 1 and 2 updates will be received and the version 2 updates will not be sent.

The RIP routing process will be removed from the router and routing updates will not be forwarded.

14. How are RIP v1 and RIP v2 similar to one another? (Choose three.)

They both use hop count as a metric.

They both have the same metric value for infinite distance.

They both broadcast their updates to their neighbors.

They both send subnet mask information in their updates.

They both provide for authentication of update sources.

They both use split horizon to prevent routing loops.

15.

Refer to the exhibit. The exhibited network contains a mixture of Cisco and non-Cisco routers. The command debug ip rip was entered on the JAX router. All routers are running the same version of RIP. Router CHI and Router ORL are not able to reach the 192.168.1.16/28 network. What is a possible solution to this problem?

Enable split horizon in the network.

Configure RIPv2 on routers.

Add network 192.168.1.0 to the RIP configuration on the JAX router.

Configure JAX Fa0/0 as a passive interface.

Enable the Serial0/0/0 interface on the JAX router.

Change the IP address on the Fa0/0 interface of the JAX router to 192.168.1.1/24.

16. What field was added to the RIP message header by RFC 1723 to add support for VLSM and CIDR?

subnet mask

destination port number

address family identifier

source and destination IP addresses

17.

Refer to the exhibit. Which command on which router will allow Router1 to learn about the 192.168.0.0/20 network?

Router1(config)# ip classless

Router1(config-router)# no passive-interface serial 0/1/1

Router2(config-router)# version 2

Router2(config-router)# neighbor 10.0.0.2

18.

Refer to the exhibit. Which two statements are true? (Choose two.)

Router1 will install a route to 192.168.0.0/20




Router2 will not install a route to 192.168.16.0/20

19.

Refer to the exhibit. All routers are running RIP version 2. JAX is configured to just advertise the 10.0.0.0/24 network. CHI is configured to advertise the 172.16.0.0/16 network. A network administrator enters the commands shown in the exhibit. What changes will occur in this network?

The JAX router will ignore updates for the 172.16.0.0/16 network due to split horizon issues.

The CHI router will install a route to the 192.168.0.0/16 network in its routing table.

The routing table for CHI will have the 192.168.0.0/16 route but it will have an S next to the route.

The ORL router will apply a 255.255.0.0 subnet mask to all networks in the routing updates it forwards.

20.

Refer to the exhibit. Which command will allow Router2 to learn about the 192.168.16.0/28 network?

Router1(config)# ip classless

Router1(config-router)# network 192.168.16.0

Router1(config-router)# no passive-interface serial 0/1/1

Router2(config-router)# version 2

Router2(config-router)# neighbor 10.0.0.2

CHAPTER 6

1. What two advantages does CIDR provide to a network? (Choose two.)

reduced routing table size

dynamic address assignment

automatic route redistribution

reduced routing update traffic

automatic summarization at classful boundaries

2.

Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?

192.168.4.3/29

192.168.4.15/29

192.168.4.65/26

192.168.4.255/24

3.

In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?

3

4

12

36

84

180

4. Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)

32-bit address

next hop router interface

subnet mask

unicast host address

Layer 2 address

5.

Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?

255.255.255.192

255.255.255.224

255.255.255.240

255.255.255.248

255.255.255.252

6. What does VLSM allow a network administrator to do?

utilize one subnet mask throughout an autonomous system

utilize multiple subnet masks in the same IP address space

utilize IGRP as the routing protocol in an entire autonomous system

utilize multiple routing protocols within an autonomous system

7. Which three interior routing protocols support VLSM? (Choose three.)

OSPF

RIP v1

RIP v2

EIGRP

BGP

STP

8. Which of the following problems does VLSM help to alleviate?

the shortage of IP addresses

the difficulty of assigning static IP addresses to hosts in large enterprises

the complexity of implementing advanced routing protocols such as OSPF and EIGRP

the shortage of network administrators qualified in the use of RIP v1 and IGRP

9.

Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from the S0/0/0 interface on R1 to host B fails. The technician begins testing the network and has the following results: 1. pings from R1 to the S0/0/0 interface on R2….successful 2. pings from R1 to the Fa0/0 interface on R2….successful 3. pings from host B to hosts on the 10.1.1.0/24 network….successful 4. pings from host B to the Fa0/0 interface on R2….successful 5. pings from R2 to host B….successful. What is the likely cause of the failure of the ping from R1 to host B?

The default gateway on host B is not correctly set.

There are no routes back to networks connected to R1 from R2.

There is a Layer 2 problem between R2 and host B.

Host B has a defective Ethernet card.

10. A network administrator is tasked with dividing up a class C network among the QA, Sales, and Administration departments. The QA department is made up of 10 people, the Sales is made up of 28 people, and the Administration has 6. Which two subnets masks adequately address the QA and Sales departments? (Choose two.)

255.255.255.252 for QA

• 255.255.255.224 for Sales

• 255.255.255.240 for QA

255.255.255.248 for QA

255.255.255.0 for Sales

11.

Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets?

192.168.0.0/23

192.168.0.0/22

192.168.0.0/21

192.168.0.0/20

12

A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which bit mask should be used to provide for the number of host addresses required on Router A, while wasting the fewest addresses?

/31

/30

/29

/28

/27

/26

13.

Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address in each subnet. Which IP address would be usable for a host on one of the LANs in this network?

192.168.1.5/30

192.168.2.17/28

192.168.2.63/27

192.168.2.130/25

14.

Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network 172.16.1.0 to Router B?

none

8

16

24

15.

Refer to the exhibit. The number of required host addresses for each subnet in a network is listed in the exhibit. This number includes the host address requirements for all router ports and hosts on that subnet. After all device and router port address assignments are determined, what will be the total number of unused host addresses available?

6

14

29

34

40

62

16.

An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses?

192.1.1.16/26

192.1.1.96/28

192.1.1.160/28

192.1.1.196/27

192.1.1.224/28

192.1.1.240/28

17. What is a supernet?

the network for a default route

a summarization of classful addresses

a network that contains both private and public addresses

a set of discontiguous networks that are controlled by an ISP

18.

Refer to the exhibit. A network administrator needs to create two subnetworks from 10.0.0.0/8 for a router running RIPv2. The Admin subnet requires 120 hosts and the Sales subnet requires 58 hosts. The network administrator assigned 10.0.1.128/25 to the Admin subnet. The Sales subnet is given 10.0.1.192/26. What will be the result of this addressing scheme?

Because RIPv2 does not support VLSM, the subnet masks will not be allowed.

The subnets will not have enough host addresses for the given network requirements.

The subnets overlap and will be rejected by the router.

The router will support the addressing scheme.

19. A router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of networks are summarized by this route?

192.168.0.0 – 192.168.32.0/24

192.168.0.0 – 192.168.47.0/24

192.168.32.0 – 192.168.47.0/24

192.168.32.0 – 192.168.48.0/24

192.168.32.0 – 192.168.63.0/24

20.

Refer to the exhibit. The network administrator wants to minimize the number of entries in Router1’s routing table. What should the administrator implement on the network?

VLSM

CIDR

private IP addresses

classful routing

21.

Refer to the exhibit. What subnet mask will be applied by router B when it receives a RIPv1 update for the network 172.16.1.0?

none

8

16

24

22.

Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from R1 to Host B fails. The technician begins testing the network and has the following results:

1. pings from R1 to the S0/0/0 interface on R2….successful 2. pings from R1 to the Fa0/0 interface on R2….successful 3. pings from Host B to hosts on the 10.1.1.0/24 network….successful 4. pings from Host B to the Fa0/0 interface on R2….successful 5. pings from R2 to Host B….successful

What is the likely cause of the failure of the ping from R1 to Host B?

Host B has a defective Ethernet card.

The default gateway on Host B is not correctly set.

There is a Layer 2 problem between R2 and Host B.

R2 does not have routes back to networks connected to R1.

CHAPTER 5

1.

Refer to the exhibit. The network that is shown is running RIPv1. The 192.168.10.0/24 network was recently added and will only contain end users. What command or set of commands should be entered on Router1 to prevent RIPv1 updates from being sent to the end user devices on the new network while still allowing this new network to be advertised to other routers?

Router1(config-router)# no router rip Router1(config-router)# network 192.168.10.0

Router1(config-router)# no network 192.168.10.0

Router1(config-router)# passive-interface fastethernet 0/0

Router1(config-router)# passive-interface serial 0/0/0

2.

Refer to the output from the show ip route command. What can be concluded from the output of this router command?

A preferred route to the destination has not been set.

There are two equal cost paths to network 1.0.0.0.

Both interfaces are being used equally to route traffic.

A variance must be set to load-balance across multiple paths.

3.

Refer to the exhibit. The Ethernet interface on Router2 goes down and the administrator notices that the route is still in the Router1 routing table. How much longer will Router1 keep the down network in its routing table before marking it as possibly down?

30 seconds

90 seconds

155 seconds

180 seconds

255 seconds

4. What is the default update period in seconds for the RIP routing protocol?

10

12

15

20

30

60

5. Which of the following is considered a limitation of RIP v1?

RIP v1 does not send subnet mask information in its updates.

RIP v1 is not widely supported by networking hardware vendors.

RIP v1 consumes excessive bandwidth by multicasting routing updates using a Class D address.

RIP v1 requires enhanced router processors and extra RAM to function effectively.

RIP v1 does not support load balancing across equal-cost paths.

RIP v1 authentication is complicated and time-consuming to configure.

6. Which command will display RIP activity as it occurs on a router?

debug ip rip

show ip route

show ip interface

show ip protocols

debug ip rip config

show ip rip database

7. What are three characteristics of the RIPv1 routing protocol? (Choose three.)

supports the use of VLSM

uses hop count as a metric

considers a metric of 16 as infinity

has an administrative distance of 110 by default

includes the destination IP address and subnet mask in routing updates

calculates metrics using the Bellman Ford algorithm

8.

Which of the following would be the correct command sequence to enable RIP on Router B for all connected networks?

RouterB# router rip RouterB(router)# network 210.36.7.0 RouterB(router)# network 220.17.29.0 RouterB(router)# network 211.168.74.0

RouterB(config)# router rip RouterB(config-router)# network 198.16.4.0 RouterB(config-router)# network 211.168.74.0 RouterB(config-router)# network 199.84.32.0

RouterB(config)# configure router rip RouterB(config-router)# network 210.36.7.0 RouterB(config-router)# network 199.84.32.0 RouterB(config-router)# network 211.168.74.0



9.

Refer to the exhibit. All routers are configured with valid interface addresses in the indicated networks and are running RIPv1. The network is converged. Which routes are present in the routing tables?

All routers have all routes in their routing table.

All routers have all /30 routes, but do not have /24 routes in their routing table.

All routers have all /30 routes. Routers A and E also have some of the /24 routes in their routing table.

All routers have all /30 routes. Routers B and D also have some of the /24 routes in their routing table.

Routers A and E have all routes. Routers B and D have only /30 routes in their routing table.

Routers A and E have only /24 routes. Routers B and D have only /30 routes in their routing table.

10. What will happen if an interface IP address is entered for the address portion of the network command in a RIPv1 configuration instead of a network address?

The router will reject the command.

A route to the host address will be added to outgoing RIP updates.

A route to the host address will be added to the routing table.

All interfaces in the same classful network as the configured address will be included in the RIPv1 routing process.

11.

Refer to the exhibit. Router1 and Router2 are running the RIPv1 protocol. The network administrator configures the command network 10.1.0.0 on Router1. What network will Router1 advertise to Router2?

10.1.0.0/16

10.1.0.0/8

10.0.0.0/16

10.0.0.0/8

12.

Refer to the exhibit. All routers in the exhibit are running RIP v1. The network administrator issues the show ip route command on router A. What routes would appear in the routing table output if the network is converged? (Choose two).

R 192.168.2.0/24 [120/1]

C 192.168.2.0/24 [120/1]

R 10.10.3.0/24 [120/0]

C 10.10.3.0/24 [120/1]

R 10.10.1.0/24 [120/2]

R 10.10.1.0/24 [120/3]

13.

Refer to the exhibit. A network consists of multiple routers. What can be verified when the show ip protocols command is issued on one of the routers in the network?

whether all routes in the network have been properly added to the routing table

routing protocol configuration in use for IP on this router

operational status of routing protocols in use on all routers in the network

routing metric of each network that is listed in the routing table

14.

Refer to the exhibit. What can be concluded from the routing table output of router B?

A static default route has been configured on B.

The default-information originate command has been entered on A.

All traffic that is destined for 192.168.1.1 will be sent to address 0.0.0.0.

Hosts on the 10.16.1.0/27 network have 192.168.1.1 configured as the default gateway address.

15. The following line was displayed in the output of the show ip route command. R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0 What is the value of the routing metric?

3

12

20

30

120

16.

Refer to the exhibit. All routers that are shown are running the RIP routing protocol. All unknown IP traffic must be forwarded to the ISP. What router or set of routers are recommended to have both a default route and the default-information originatecommand issued to implement this forwarding policy?

only Router1

only the gateway router

all routers in the network

only the routers with LANs needing Internet access

17.

Refer to the exhibit. Router1 is running RIPv1. What command was entered into Router1 to configure the gateway of last resort?

no auto-summary

ip default-network 0.0.0.0

ip default-gateway 10.0.0.0

ip route 0.0.0.0 0.0.0.0 S0/0/1

18. Which command or set of commands will stop the RIP routing process?

RouterB(config)# router rip RouterB(config-router)# shutdown

RouterB(config)# router rip RouterB(config-router)# network no 192.168.2.0

RouterB(config)# no router rip

RouterB(config)# router no rip

19. Which two statements are true regarding the characteristics of RIPv1? (Choose two).

It is a distance vector routing protocol.

It advertises the address and subnet mask for routes in routing updates.

The data portion of a RIP message is encapsulated into a TCP segment.

The data portion of a RIP message is encapsulated into a UDP segment.

It broadcasts updates every 15 seconds.

It allows a maximum of 15 routers in the routing domain.

20.

Refer to the exhibit. RIPv1 is running on all three routers. All interfaces have been correctly configured with addresses in the address ranges that are shown. Which route would you see in the routing table on router CHI if the routers are configured with the commands that are displayed in the exhibit?

192.168.0.4/30

192.168.0.0/24

192.168.0.0/16

192.168.0.32/27

21. Refer to the exhibit. The Ethernet interface on Router2 goes down and the administrator notices that the route is still valid in the routing table of Router1. How much longer will it take for Router1 to mark the route invalid by setting the metric to 16?

30 seconds

90 seconds

155 seconds

180 seconds

255 seconds

CHAPTER 4

1.

What actions will occur after RouterA loses connectivity to network 114.125.16.0? (Choose two.)

RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterA.

During the next update interval, RouterB will send a RIP update out both ports that includes the inaccessible network.

During the next update interval, RouterC will send an update to RouterB stating that network 114.125.16.0 is accessible in 2 hops.

Router C will learn of the loss of connectivity to network 114.125.16.0 from RouterB.

RouterB will include network 123.92.76.0 and 136.125.85.0 in its update to RouterC.

2. What does a router running RIP do first with a new route that is received from an advertisement?

places it immediately in the routing table

adjusts the metric for the new route to show the added distance for the route

advertises this route out all other interfaces except the one that it came in on

sends a ping packet to verify that the path is a feasible route

3.

Refer to the exhibit. If all routers are using RIP, how many rounds of updates will occur before all routers know all networks?

1

2

3

4

5

6

4. Which of the following methods does split horizon use to reduce incorrect routing information?

Routing updates are split in half to reduce the update time.

Information learned from one source is not distributed back to that source.

New route information must be learned from multiple sources to be accepted.

The time between updates is split in half to speed convergence.

New route information is suppressed until the system has converged.

5.

Refer to the exhibit. The routers in this network are running RIP. Router A has not received an update from Router B in over three minutes. How will Router A respond?

The Holddown timer will wait to remove the route from the table for 60 seconds.

The Invalid timer will mark the route as unusable if an update has not been received in 180 seconds.

The Update timer will request an update for routes that were learned from Router B.

The Hello timer will expire after 10 seconds and the route will be flushed out of the routing table.

6.

The graphic shows a network that is configured to use RIP routing protocol. Router2 detects that the link to Router1 has gone down. It then advertises the network for this link with a hop count metric of 16. Which routing loop prevention mechanism is in effect?

split horizon

error condition

hold-down timer

route poisoning

count to infinity

7. Which two statements describe EIGRP? (Choose two.)

EIGRP can be used with Cisco and non-Cisco routers.

EIGRP sends triggered updates whenever there is a change in topology that influences the routing information.

EIGRP has an infinite metric of 16.

EIGRP sends a partial routing table update, which includes just routes that have been changed.

EIGRP broadcasts its updates to all routers in the network.

8. Which event will cause a triggered update?

an update routing timer expires

a corrupt update message is received

a route is installed in the routing table

the network is converged

9. Which of the following statements are correct about RIP?

uses a broadcast to update all other routers in the network every 60 seconds

uses a multicast address to update other routers every 90 seconds

will send out an update if there is a failure of a link

updates only contain information about routes that have changed since last update

10. Which two statements are true regarding the function of the RIPv1 routing updates? (Choose two).

updates are broadcast only when there are changes to the topology

updates are broadcast at regular intervals

broadcast are sent to 0.0.0.0

broadcasts are sent to 255.255.255.255

updates contain the entire network topology

only changes are included in the updates

11. A network administrator is evaluating RIP versus EIGRP for a new network. The network will be sensitive to congestion and must respond quickly to topology changes. What are two good reasons to choose EIGRP instead of RIP in this case? (Choose two.)

EIGRP uses periodic updates.

EIGRP only updates affected neighbors.

EIGRP uses broadcast updates.

EIGRP updates are partial.

EIGRP uses the efficient Bellman-Ford algorithm.

12. Which two conditions are most likely to cause a routing loop? (Choose two.)

random jitter

implementation of classful addressing

inconsistent routing tables

incorrectly configured static routes

a network converging too quickly

13. What metric does the RIP routing protocol consider to be infinity?

0

15

16

224

255

14. What does the RIP holddown timer do?

ensures an invalid route has a metric of 15

prevents a router from sending any updates after it has introduced a routing loop into the network

ensures every new route is valid before sending an update

instructs routers to ignore updates, for a specified time or event, about possible inaccessible routes

15.

Refer to the exhibit. What path will packets from the 192.168.1.0/24 network travel to reach the 10.0.0.0/8 network if RIP is the active routing protocol?

The path will be router A -> router B -> router C -> router E.

The path will be router A -> router D -> router E

Router A will load balance between the router A -> router D -> router E and router A -> router B -> router C -> router E path

Packets will alternate paths depending on the order they arrive at router A.

16. Three routers running a distance-vector routing protocol lost all power, including the battery backups. When the routers reload, what will happen?

They will share all routes saved in NVRAM prior to the power loss with their directly connected neighbors.

They will multicast hello packets to all other routers in the network to establish neighbor adjacencie

They will send updates that include only directly connected routes to their directly connected neighbor

They will broadcast their full routing table to all routers in the networ

17. What is a routing loop?

a packet bouncing back and forth between two loopback interfaces on a route

a condition where a return path from a destination is different from the outbound path forming a "loop"

a condition where a packet is constantly transmitted within a series of routers without ever reaching its intended destination

the distribution of routes from one routing protocol into another

18. Which statement is true regarding cisco’s RIP_JITTER variable?

It prevents the synchronization of routing updates by buffering the updates as they leave the router interface

It prevents the synchronization of routing updates by subtracting a random length of time ranging from 0% to 15% of the specified interval time from the next routing update

It prevents the synchronization of routing updates by causing the router to skip every other scheduled update time

It prevents the synchronization of routing updates by forcing the router to listen when its time for other updates on the lines before sending it

19. Which three routing protocols are distance vector routing protocols? (Choose three).

RIPv1

EIGRP

OSPF

IS-IS

RIPv2

20. Which of the following can exist in a distance vector network that has not converged? (Choose three).

routing loops

inconsistent traffic forwarding

no traffic forwarding until system converges

inconsistent routing table entries

routing table updates sent to wrong destinations

21. What is the purpose of the TTL field in the IP header?

used to mark routes as unreachable in updates sent to other routers

prevents regular update messages from reinstating a route that may have gone bad

prevents a router from advertising a network through the interface from which the update came

limits the time or hops that a packet can traverse through the network before it should be discarded

defines a maximum metric value for each distance vector routing protocol by setting a maximum hop count

CHAPTER 3

. Which two statements correctly describe the concepts of administrative distance and metric? (Choose two.)

Administrative distance refers to the trustworthiness of a particular route. A router first installs routes with higher administrative distances.

The value of the administrative distance can not be altered by the network administrator.

Routes with the smallest metric to a destination indicate the best path.

The metric is always determined based on hop count.

The metric varies depending which Layer 3 protocol is being routed, such as IP or IPX.

2.

Refer to the exhibit. Which statement correctly describes how R1 will determine the best path to R2?

R1 will install a RIP route using network A in its routing table because the administrative distance of RIP is higher than EIGRP.

R1 will install a RIP route using network A in its routing table because the path cost from RIP is lower than EIGRP.

R1 will install an EIGRP route using network B in its routing table because the administrative distance of EIGRP is lower than RIP.

R1 will install an EIGRP route using network B in its routing table because the path cost from EIGRP is lower than RIP.

R1 will install an EIGRP route and a RIP route in its routing table and load balance between them.

3. Which two statements are true regarding classless routing protocols? (Choose two.)

* sends subnet mask information in routing updates

sends complete routing table update to all neighbors

is supported by RIP version 1

* allows for use of both 192.168.1.0/30 and 192.168.1.16/28 subnets in the same topology

reduces the amount of address space available in an organization

4. Which command would the network administrator issue to determine if load balancing is in effect on a router?

show ip protocols

show ip route

show ip interface brief

show ip interface

5. Which statement is true regarding routing protocols?

RIP uses hop count and bandwidth as the metric for path selection and sendsupdates periodically.

OSPF is a Cisco proprietary protocol that sends updates triggered by topology changes.

EIGRP uses DUAL to calculate the shortest path and can be configured to do unequal cost load balancing.

BGP is a path vector interior routing protocol.

6. Which two conditions would create a setting where the use of a distance-vector routing protocol would be efficient? (Choose two.)

the network requires a special hierarchical design

fast convergence of the network is crucial

the network is using a hub and spoke topology

the network is using a flat design

there are more than 15 hops between the most distant routers

7. What is the purpose of a routing protocol?

It is used to build and maintain ARP tables.

It provides a method for segmenting and reassembling data packets.

It allows an administrator to devise an addressing scheme for the network.

It allows a router to share information about known networks with other routers.

It provides a procedure for encoding and decoding data into bits for packet forwarding.

8. Which of the following best describes the operation of distance vector routing protocols?

They use hop count as their only metric.

They only send out updates when a new network is added.

They send their routing tables to directly connected neighbors.

They flood the entire network with routing updates.

9. Which of the following is associated with link-state routing protocols?

low processor overhead

poison reverse

routing loops

split horizon

shortest-path first calculations

10. Why is fast convergence desirable in networks that use dynamic routing protocols?

Routers will not allow packets to be forwarded until the network has converged.

Hosts are unable to access their gateway until the network has converged.

Routers may make incorrect forwarding decisions until the network has converged.

Routers will not allow configuration changes to be made until the network has converged.

11. Which of the following conditions must be met in order for a network to have converged?

The routers in the network are operating with dynamic routing protocols.

The routers in the network are operating with compatible versions of IOS.

The routers in the network are operating with the same routing tables.

The routers in the network are operating with consistent routing knowledge.

12. Which two statements are true regarding metrics? (Choose two.)

RIP uses bandwidth as a metric.

OSPF uses delay as a metric.

EIGRP uses bandwidth as a metric.

OSPF uses cost based on bandwidth as a metric.

RIP uses delay as a metric.

EIGRP uses hop count only as a metric.

13. Which two statements are true regarding the advantages of the use of static routes? (Choose two).

increased security

reduced effort in configuring routes

the administrator maintains control over routing

easier to implement in a growing network

reduces the chance of routing errors

increased router resource usage

14. The following line of code is displayed in a routing table: R 209.165.201.0/24 [120/2] via 192.168.252.2, 00:00:16, S0/0/0 What can be concluded from this output?

A packet destined for host 192.168.252.2 will be forwarded out the interface connected to network 209.165.201.0/24.

The value, 120, is used to determine the best path when a router has more than one routing protocol configured for the same destination network.

This route was manually configured using the ip route command.

192.168.252.2 is an interface on the router that produced this output.

15. What will be the result of the following commands?

ORL(config)# interface fastethernet 0/0 ORL(config-if)# ip address 172.16.3.1 255.255.255.0 ORL(config-if)# no shutdown

The 172.16.3.0 network will be routed by any dynamic routing protocol automatically.

A routing table entry is made to the 172.16.3.0 network with a code of “C”.

A static route is required to route traffic to the 172.16.3.0 network.

The commands will be saved to the startup-configuration.

16. An engineer creates a static route by entering the Router(config)# ip route 10.0.0.0 255.255.255.0 192.168.1.2 command. What can be concluded about this route?

The administrative distance of this route is 1.

192.168.1.2 is the address of an interface on this router.

This route will display as a directly connected network in the routing table.

Packets with a destination IP address of 192.168.1.2 will be forwarded to the 10.0.0.0/24 network first.

17.

Refer to the exhibit. Router1 and Router2 are running EIGRP. All interfaces are operational and packets can be forwarded between all networks. What information will be found in the routing table for Router1?

Router1 will have 6 directly connected networks.

The administrative distance of the route to network 172.16.0.0 will be 90.

The metric for routes to 172.16.0.0 will be 1.

The interface that is used to forward packets to 172.16.0.0 will always be the S0/1 interface.

18. The following line of code is present in the routing table: O 10.16.1.0/27 [110/129] via 192.168.1.5, 00:00:05, Serial0/0/1 What does the number 129 indicate in this output?

The cost for this link has a value of 129.

The clock rate on this serial interface is set to 129,000.

The next-hop router is 129 hops away from this router.

This route has been updated 129 times in this routing table.

19. A growing medium-sized manufacturing company recently began to have routing instability issues. The company uses static routes and has a mixture of over 30 Cisco and non-Cisco routers. The network administrator has decided to convert the network to dynamic routing. What characteristics of protocols should be considered in this selection process?

Distance vector routing protocols, such as RIP, converge more quickly than do link-state routing protocols.

EIGRP can be used on all of the routers in the company.

OSPF can be used between the routers.

An exterior routing protocol, such as BGP, is recommended for growing companies.

20.

Refer to the exhibit. If RIP is the routing protocol, what is the value of the metric from router A to network 192.168.5.0/24?

3

4

56

624

724

21. A router learns two paths with equal metrics to a destination network via the RIP routing protocol. How will the router handle packets to the destination network?

The router will install the first route it learned into the routing table.

The router will install both routes in the routing table and load balance between the two.

The router will put the first route in the routing table, and denote the second route as a backup route.

The router will pick the path with the higher bandwidth and will place it in the routing table.

22. When multiple routing protocols have a route to the same destination network, what determines which route is installed in the routing table?

best metric

lowest hop count

greatest available bandwidth

lowest administrative distance

CHAPTER 2

1. A static route that points to the next hop IP will have what administrative distance and metric in the routing table?

administrative distance of 0 and metric of 0




2. What address can be used to summarize networks 172.16.1.0/24, 172.16.2.0/24, 172.16.3.0/24, and 172.16.4.0/24?

172.16.0.0/21

172.16.1.0/22

172.16.0.0 255.255.255.248

172.16.0.0 255.255.252.0

3.

The routers in the diagram use the subnet assignments shown. What is the most efficient route summary that can be configured on Router3 to advertise the internal networks to the cloud?

192.1.1.0/26 and 192.1.1.64/27

192.1.1.128/25

192.1.1.0/23 and 192.1.1.64/23

192.1.1.0/24

192.1.1.0/25

192.1.1.0/24 and 192.1.1.64/24

4.

Refer to the exhibit. What is the significance of the /8 in the route to the 10.0.0.0 network?

It indicates that there are 8 hops between this router and the 10.0.0.0 network.

It represents the time, in milliseconds, it takes for a ping to reply when sent to the 10.0.0.0 network.

It indicates that there are 8 subnets in the destination network to which the router can forward packets.

It indicates the number of consecutive bits, from the left, in the destination IP address of a packet that must match 10.0.0.0 to use that route.

5.

Refer to the exhibit. How will packets destined to the 172.16.0.0 network be forwarded?

Router1 will perform recursive lookup and packet will exit S0/0.

Router1 will perform recursive lookup and packet will exit S0/1.

There is no matching interface associated with network 172.16.0.0 so packets will be dropped.

There is no matching interface associated with network 172.16.0.0 so packets will take gateway of last resort and exit out S0/2.

6. A network administrator enters the following command into Router1: ip route 192.168.0.0 255.255.255.0 S0/1/0. Router1 then receives a packet that is destined for 192.168.0.22/24. After finding the recently configured static route in the routing table, what does Router1 do next to process the packet?

drops the packet because the destination host is not listed in the routing table

looks up the MAC address of the S0/1/0 interface to determine the destination MAC address of the new frame

performs a recursive lookup for the IP address of the S0/1/0 interface before forwarding the packet

encapsulates the packet into a frame for the WAN link and forwards the packet out the S0/1/0 interface

7.

Refer to the exhibit. Given the output in the exhibit, how would a clock rate be determined for this link?

The rate would be negotiated by both routers.

A rate would not be selected due to the DCE/DTE connection mismatch.

The rate configured on the DTE determines the clock rate.

The rate configured on the DCE determines the clock rate.

8.

Refer to the exhibit. Which set of commands will configure static routes that will allow the WinterPark and the Altamonte routers to deliver packets from each LAN and direct all other traffic to the Internet?

WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1 Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2 Altamonte(config)# ip route 0.0.0.0 0.0.0.0 s0/1


WinterPark(config)# ip route 172.191.67.0 255.255.255.0 192.168.146.1 WinterPark(config)# ip route 0.0.0.0 0.0.0.0 192.168.146.1 Altamonte(config)# ip route 10.0.234.0 255.255.255.0 192.168.146.2


9. Hosts on two separate subnets cannot communicate. The network administrator suspects a missing route in one of the routing tables. Which three commands can be used to help troubleshoot Layer 3 connectivity issues? (Choose three.)

ping

show arp

traceroute

show ip route

show interface

show cdp neighbor detail

10.

Refer to the exhibit. A company network engineer is assigned to establish connectivity between the two Ethernet networks so that hosts on the 10.1.1.0/24 subnet can contact hosts on the 10.1.2.0/24 subnet. The engineer has been told to use only static routing for these company routers. Which set of commands will establish connectivity between the two Ethernet networks?

R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1 R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2





11. Which of the following are displayed by the Router# show cdp neighbors command? (Choose three.)

load

platform

reliability

holdtime

local interface

12.

Refer to the exhibit. What two commands are required to provide connectivity between the 192.168.1.0 and 10.0.0.0 networks without requiring recursive lookup? (Choose two.)

A(config)# ip route 10.0.0.0 255.0.0.0 s 0/1/0

A(config)# ip route 10.0.0.0 255.0.0.0 172.16.40.2

A (config)# ip route 10.0.0.0 255.0.0.0 s 0/0/0

B(config)# ip route 192.168.1.0 255.255.255.0 s 0/0/0

B (config)# ip route 192.168.1.0 255.255.255.0 172.16.40.1

B(config)# ip route 192.168.1.0 255.255.255.0 s 0/1/0

13.

Refer to the exhibit. What two commands will change the next-hop address for the 10.0.0.0/8 network from 172.16.40.2 to 192.168.1.2? (Choose two.)

A(config)# no network 10.0.0.0 255.0.0.0 172.16.40.2

A(config)# no ip address 10.0.0.1 255.0.0.0 172.16.40.2

A(config)# no ip route 10.0.0.0 255.0.0.0 172.16.40.2

A(config)# ip route 10.0.0.0 255.0.0.0 s0/0/0

A(config)# ip route 10.0.0.0 255.0.0.0 192.168.1.2

14. What happens to a static route entry in a routing table when the outgoing interface is not available?

The route is removed from the table.

The router polls neighbors for a replacement route.

The route remains in the table because it was defined as static.

The router redirects the static route to compensate for the loss of the next hop device.

15. A router has one static route to each destination network. Which two scenarios would require an administrator to alter the static routes that are configured on that router? (Choose two.)

The destination network no longer exists.

The destination network is moved to a different interface on the same router.

The path between the source and destination is upgraded with a higher bandwidth link.

A topology change occurs where the existing next-hop address or exit interface is not accessible.

The remote destination network interface has to be down for 15 minutes of maintenance.

16. Why is it advisable to enter a next-hop IP address when creating a static route whose exit interface is an Ethernet network?

Adding the next-hop address eliminates the need for the router to do any lookups in the routing table before forwarding a packet.

In a multi-access network, the router cannot determine the next-hop MAC address for the Ethernet frame without a next-hop address.

Using a next-hop address in a static route provides a route with a lower metric.

In multi-access networks, using a next-hop address in a static route makes that route a candidate default route.

17. The output of the Router# show interfaces serial 0/1 command displays the following: Serial0/1 is up, line protocol is down. What is the most likely cause for the line protocol being down?

Serial0/1 is shutdown.

There is no cable connecting the routers.

The remote router is using serial 0/0.

No clock rate has been set.

18.

Refer to the exhibit. Which static route should be configured on Router1 so that host A will be able to reach host B on the 172.16.0.0 network?

ip route 192.168.0.0 172.16.0.0 255.255.0.0

ip route 172.16.0.0 255.255.0.0 192.168.0.1

ip route 172.16.0.0 255.255.0.0 S0/0/1

ip route 172.16.0.0 255.255.0.0 S0/0/0

19. What two devices are responsible for converting the data from the WAN service provider into a form acceptable by the router? (Choose two).

the serial port of the router

a modem

a switch

the ethernet port of the router

a CSU/DSU device

a DTE device

20.

Which of the following is true regarding CDP and the graphic shown?

CDP running on Router D will gather information about routers A, B, C, and E.

By default, Router A will receive CDP advertisements from routers B and C.

If routers D and E are running different routing protocols, they will not exchange CDP information.

Router E can use CDP to identify the IOS running on Router B.

21. Which two statements describe functions or characteristics of CDP? (Choose two.)

It starts up automatically and allows the device to detect directly connected neighbor devices that use CDP.

It operates at the network layer and allows two systems to learn about each other.

It creates a topology map of the entire network.

It allows systems to learn about each other even if different network layer protocols are configured.

It forwards advertisements about routes for faster convergence.

22. Which piece of information is available from examining the output of the command show ip interface brief?

Interface speed and duplex

Interface MTU

Errors

Interface MAC address

Interface IP address

CHAPTER 1

1. If a router cannot find a valid configuration file during the startup sequence, what will occur?

The startup sequence will reset.

The router will prompt the user for a response to enter setup mode.

The startup sequence will halt until a valid configuration file is acquired.

The router will generate a default configuration file based on the last valid configuration.

The router will monitor local traffic to determine routing protocol configuration requirements.

2.

Refer to the exhibit. The network administrator has configured the router with the interface IP addresses shown for the directly connected networks. Pings from the router to hosts on the connected networks or pings between router interfaces are not working. What is the most likely problem?

The destination networks do not exist.

The IP addresses on the router interfaces must be configured as network addresses and not host addresses.

The interfaces must be enabled with the no shutdown command.

Each interface must be configured with the clock rate command.

3.

Refer to the exhibit. What can be concluded from the routing table output in the exhibit? (Choose two.)

This router only has two interfaces.

The router interfaces are not operational yet.

This router is configured to forward packets to remote networks.

The FastEthernet0/0 and Serial0/0/0 interfaces of this router were configured with an IP address and the no shutdown command.

An IP packet received by this router with a destination address of 198.18.9.1 will be forwarded out of the Serial0/0/0 interface.

4.

Refer to the exhibit. The frame shown in the exhibit was received by the router. The router interfaces are operational. How will the router process this frame? (Choose two.)

The router will change the source and destination IP address in the packet before forwarding the frame.

The router will change the frame type to one supported by the WAN link before forwarding the frame.

The router will use the destination MAC address to determine which interface to forward the packet.

The router will look up the MAC address of the S0/0/0 interface in the ARP table and add it to the frame before forwarding.

The frame was received on the Fa0/0 interface of the router and will be switched to the S0/0/0 interface.

The frame was received on the S0/0/0 interface of the router and will be switched to the Fa0/0 interface.

5. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)

VTY interface

console interface

Ethernet interface

secret EXEC mode

privileged EXEC mode

router configuration mode

6. Which two statements correctly describe the components of a router? (Choose two.)

RAM permanently stores the configuration file used during the boot sequence.

ROM contains diagnostics executed on hardware modules.

NVRAM stores a backup copy of the IOS used during the boot sequence.

Flash memory does not lose its contents during a reboot.

ROM contains the most current and most complete version of the IOS.

Flash contains boot system commands to identify the location of the IOS

7.

Refer to the exhibit. After host 2 is connected to the switch on the LAN, host 2 is unable to communicate with host 1. What is the cause of this problem?

The subnet mask of host 2 is incorrect.

Host 1 and host 2 are on different networks.

The switch needs an IP address that is not configured.

The router LAN interface and host 1 are on different networks.

The IP address of host 1 is on a different network than is the LAN interface of the router.

8. Which are functions of a router? (Choose three.)

packet switching

extension of network segments

segmentation of broadcast domains

selection of best path based on logical addressing

election of best path based on physical addressing

9.

Refer to the exhibit. All routers have a route in its routing table to each network that is shown in the exhibit. Default routes have not been issued on these routers. What can be concluded about how packets are forwarded in this network? (Choose two.)

If RouterC receives a packet that is destined for 10.5.1.1, it will be forwarded out interface Fa0/0.

If RouterA receives a packet that is destined for 192.168.3.146, it will be forwarded out interface S0/0/1.

If RouterB receives a packet that is destined for 10.5.27.15, it will be forwarded out interface S0/0/1.

If RouterB receives a packet that is destined for 172.20.255.1, it will be forwarded out interface S0/0/0.

If RouterC receives a packet that is destined for 192.16.5.101, it will be forwarded out interface S0/0/1.

10.

The serial connection shown in the graphic needs to be configured. Which configuration commands must be made on the Sydney router to establish connectivity with the Melbourne site? (Choose three.)

Sydney(config-if)# ip address 201.100.53.2 255.255.255.0

Sydney(config-if)# no shutdown

Sydney(config-if)# ip address 201.100.53.1 255.255.255.224

Sydney(config-if)# clock rate 56000

Sydney(config-if)# ip host Melbourne 201.100.53.2

11.

Refer to the exhibit. What can be concluded from the output of the running-configuration of a router?

The passwords are encrypted.

The current configuration was saved to NVRAM.

The configuration that is shown will be the one used on the next reboot.

The commands that are displayed determine the current operation of the router.

12.

Refer to the exhibit. Host A pings host B. When R4 accepts the ping into the Ethernet interface, what two pieces of header information are included? (Choose two.)

source IP address: 192.168.10.129

source IP address: BBBB.3333.5677

destination IP address: 192.168.10.33

destination IP address: 192.168.10.134

destination MAC address: 9999.DADC.1234

13. What is the outcome of entering these commands?

R1(config)# line vty 0 4 R1(config-line)# password check123 R1(config-line)# login

ensures that a password is entered before entering user EXEC mode

sets the password to be used for connecting to this router via Telnet

requires check123 to be entered before the configuration can be saved

creates a local user account for logging in to a router or switch

14. Which of the following is the correct flow of routines for a router startup?

load bootstrap, load IOS, apply configuration

load bootstrap, apply configuration, load IOS

load IOS, load bootstrap, apply configuration, check hardware

check hardware, apply configuration, load bootstrap, load IOS

15. What three processes does a router execute when it receives a packet from one network that is destined for another network? (Choose three.)

decapsulates the Layer 3 packet by stripping off the Layer 2 frame header

uses the destination MAC Address in the IP Header to look up the next-hop address in the routing table

leaves the Layer 2 frame header intact when decapsulating the Layer 3 packet

uses the destination IP Address in the IP header to look up the next-hop address in the routing table

encapsulates the Layer 3 packet into the new Layer 2 frame and forwards it out the exit interface

encapsulates the Layer 3 packet into a special Layer 1 frame and forwards it to the exit interface

16. The network administrator needs to connect two routers directly via their FastEthernet ports. What cable should the network administrator use?

straight-through

rollover

cross-over

serial

17. Which two statements describe characteristics of load balancing? (Choose two.)

Load balancing occurs when a router sends the same packet to different destination networks.

Load balancing occurs when a router sends the same packet to different destination networks.

Load balancing allows a router to forward packets over multiple paths to the same destination network.

Unequal cost load balancing is supported by EIGRP.

If multiple paths with different metrics to a destinations exist, the router cannot support load balancing.

18. What information about the router and its startup process can be gathered from the output of the show version command? (Choose three.)

the last restart method

the command buffer contents

the amount of NVRAM and FLASH used

the configuration register settings

the location from where the IOS loaded

19.

Which interfaces in the exhibit could be used for a leased line WAN connection? (Choose two.)

1

2

3

4

5

6

20. From what location can a router load the Cisco IOS during the boot process? (Choose two.)

RAM

TFTP server

NVRAM

setup routine

Flash memory

terminal

21. A network administrator has just entered new configurations into Router1. Which command should be executed to save configuration changes to NVRAM?

Router1# copy running-config flash

Router1(config)# copy running-config flash

Router1# copy running-config startup-config

Router1(config)# copy running-config startup-config

Router1# copy startup-config running-config

Router1(config)# copy startup-config running-config

22. What is the default sequence for loading the configuration file?

NVRAM, FLASH, ROM

FLASH, TFTP,CONSOLE

NVRAM, TFTP, CONSOLE

FLASH, TFTP, ROM

23. What header address information does a router change in the information it receives from an attached Ethernet interface before information is transmitted out another interface?

only the Layer 2 source address

only the Layer 2 destination address

only the Layer 3 source address

only the Layer 3 destination address

the Layer 2 source and destination address

the Layer 3 source and destination address




































A network administrator is in charge of two separate networks that share a single building. What device

will be required to connect the two networks and add a common connection to the Internet that can be

shared?

hub

xxxx router

access point

Ethernet switch

Which two router component and operation pair are correctly described? (Choose two.)

DRAM ‐ loads the bootstrap

RAM ‐ stores the operating system

Flash ‐ executes diagnostics at bootup

xx NVRAM ‐ stores the configuration file

ROM ‐ stores the backup configuration file

xx POST ‐ runs diagnostics on hardware modules

A router boots and enters setup mode. What is the reason for this?

The IOS image is corrupt.

Cisco IOS is missing from flash memory.

xxx The configuration file is missing from NVRAM.

The POST process has detected hardware failure.

Refer to the exhibit. Packets destined to which two networks will require the router to perform a

recursive lookup? (Choose two.)

xxx10.0.0.0/8

64.100.0.0/16

128.107.0.0/16

172.16.40.0/24

192.168.1.0/24

xxxx192.168.2.0/24

Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?

10.30.0.0/16

10.30.15.0/23

10.30.16.0/24

xxx 10.30.16.32/27

10.30.16.32/30

Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative

distance values. All devices are properly configured and the destination network is advertised by both

protocols.


xxx The packets will travel via R2‐R1.

The packets will travel via R2‐R3.

The traffic will be load‐balanced between two paths — via R2‐R1 and via R2‐R3.

The packets will travel via R2‐R3, and the other path via R2‐R1 will be retained as the backup path.

In a complex lab test environment, a router has discovered four paths to 192.168.1.0/24 via the use of

the RIP routing process. Which route will be installed in the routing table after the discovery of all four

paths?

R 192.168.1.0/24 [120/3] via 192.168.110.1, 00:00:17, Serial0/1/0

R 192.168.1.0/24 [120/2] via 192.168.200.1, 00:00:17, Serial0/0/0

xx R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1

R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial0/1/1

A network administrator uses the RIP routing protocol to implement routing within an autonomous

system. What are two characteristics of this protocol? (Choose two.)

xx It uses the Bellman‐Ford algorithm to determine the best path.

It displays an actual map of the network topology.

It offers rapid convergence in large networks.

xx It periodically sends complete routing tables to all connected devices.

It is beneficial in complex and hierarchically designed networks.

Which two statements are true for link‐state routing protocols? (Choose two.)

xx Routers that run a link‐state protocol can establish a complete topology of the network.

Routers in a multipoint network that run a link‐state protocol can exchange routing tables.

Routers use only hop count for routing decisions.

xx The shortest path first algorithm is used.


Which two statements are true about classless routing protocols? (Choose two.)

xx They can be used for discontiguous subnets.

xx They can forward supernet routes in routing updates.

They cannot implement classful routes in routing tables.

They use only a hop count metric.

They do not include the subnet mask in routing updates.

Which statement is true regarding routing metrics?

All routing protocols use the same metrics.

EIGRP uses bandwidth as its only metric.

xx Routers compare metrics to determine the best route.

The larger metric generally represents the better path.

Which routing protocol by default uses bandwidth and delay to calculate the metric of a route?

RIPv1

RIPv2

OSPF

xx EIGRP

You have been asked to explain converged networks to a trainee. How would you accurately describe a

converged network?

A network is converged when all routers have formed an adjacency.

A network is converged immediately after a topology change has occurred.

A network is converged when all routers flush the unreachable networks from their routing tables.

xx A network is converged after all routers share the same information, calculate best paths, and

update their routing tables.

Refer to the exhibit. All the routers are properly configured to use the RIP routing protocol with default

settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is

true about the routing path?

Router A will send the data via the A‐D‐E path that is listed in the routing table.

Router A will load‐balance the traffic between A‐B‐E and A‐C‐E.

xx Router A will determine that all paths have equal metric cost.

Router A will send the data through A‐D‐E and keep A‐B‐E and A‐C‐E as the backup paths.

Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN.

Which two devices can be used for this? (Choose two.)

xx a CSU/DSU device

xx a modem

an Ethernet switch

a hub

a bridge

Which component is typically used to connect the WIC interface of a router to a CSU/DSU?

xx V.35 cable

RJ‐45 adapter

crossover cable

straight‐through cable

Which router mode is accessed by entering the enable command?

user EXEC

xx privileged EXEC

global configuration

interface configuration

Refer to the exhibit. What are the effects of the exhibited commands on the router?

All passwords are encrypted.

Only Telnet sessions are encrypted.

xx Only the enable password is encrypted.

Only the enable password and Telnet session are encrypted.

Enable and console passwords are encrypted.

Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection

discovers that interface FastEthernet0/1 is not functioning. Which action will most likely correct the

problem with FastEthernet0/1?

A clock rate should be added to the interface configuration.

The subnet mask should be added to the interface configuration.

An interface description needs to be added to the interface configuration.

xx The no shutdown command needs to be added to the interface configuration.

Refer to the exhibit. Which route in the routing table of R1 will be discarded by its neighboring router?

192.168.2.0

192.168.3.0

xx 192.168.4.0

192.168.9.0

192.168.10.0

192.168.11.0

Refer to the exhibit. All interfaces are addressed and functioning correctly. The network administrator

runs the tracert command on host A. Which two facts could be responsible for the output of this

command? (Choose two.)

The gateway for Host A is missing or improperly configured.

The gateway for Host B is missing or improperly configured.


xx The entry for 192.168.1.0/24 is missing from the routing table of R2.

xx The entry for 192.168.2.0/24 is missing from the routing table of R1.


In which situation would a default static route be recommended?

xx when connecting an edge router to the Internet

when variable length subnet masking is in effect

when there is more than one valid route for a destination network

when a destination network has a larger mask than any routes in the routing table

What is the advantage of configuring a static route with an exit interface instead of a next‐hop address?

The router will perform a recursive lookup.

This route will automatically be used as the gateway of last resort.

xx The exit interface configuration consumes less router processing time.

The exit interface configuration has an administrative distance value of 1.

Refer to the exhibit. On the basis of the show running‐config output, which option correctly reflects the

routes that will be listed in the R2 routing table?

A static route has been configured on a router. However, the destination network no longer exists. What

should an administrator do to remove the static route from the routing table?

Change the routing metric for that route.

Nothing. The static route will go away on its own.

Change the administrative distance for that route.

xx Remove the route using the no ip route command.

Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the

172.16.1.1 network. The network administrator has run the show ip route command on R1.

What could be the cause of this problem?

The FastEthernet interface on R1 is disabled.

Autosummarization is enabled on R1.

The serial interface S0/0/0 of R1 is administratively down.

xx No static route or routing protocol is configured.

Refer to the exhibit. The users on the local network 172.16.1.0/24 complain that they are unable to

connect to the Internet. What step should be taken to remedy the problem?

A new static route must be configured on R1 with the R3 serial interface as the next hop.

A new default route must be configured on R1 with the R3 serial interface as the next hop.

xx The default route on R2 should be configured with the R3 serial interface as the next hop.

The default route on R2 must be replaced with a new static route and the next hop should be the R1

FastEthernet interface.

A network administrator needs to assign the very last usable IP address in the 172.24.64.0/18 network

range to the router interface that serves this LAN. Which IP address should the administrator configure

on the interface?

172.16.128.154/18

172.16.255.254/18

172.24.64.254/18

xx 172.24.127.254/18

Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?

192.168.1.0/24

192.168.0.0/24

xx 192.168.0.0/22

192.168.1.0/22

Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?

The IP address of host A is incorrect.


xx The Fa0/1 interfaces of the two routers are configured for different subnets.


Refer to the exhibit. What does the highlighted entry for network 172.30.0.0/16 indicate?

xx Automatic summarization is enabled on R1.

The routing table of R2 contains only classful networks.

R2 will reject this update.

The routing protocol that is configured on both routers is RIPv1.

Which additional piece of information is included in the updates of classless routing protocols to support

the use of VLSM and discontiguous networks?

metric

xx network mask

neighbor router ID

administrative distance

Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down.

Which statement is true regarding how the routers in this topology will respond to this event?

Router4 will learn about the failed route 30 seconds later in the next periodic update.

Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown

timer expires.

Router5 immediately flushes the unreachable route from its routing table.

xx Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0.

What is the purpose of the TTL field within an IP packet header?

clears an unreachable route from the routing table after the invalid timer expires

prevents regular update messages from inappropriately reinstating a route that may have gone bad

removes an unreachable route from the routing table after the flush timer expires

xx limits the period of time or number of hops a packet can traverse through the network before it

should be discarded

used to mark the route as unreachable in a routing update that is sent to other routers

Which two technologies can be used in distance vector routing protocols to prevent routing loops?

(Choose two.)

authentication

link‐state advertisements

xx hold‐down timers

Spanning Tree Protocol

xx split horizon

Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?

An incorrect IP address is configured between the two routers.

No static route is configured on Router2.

xx A routing loop has occurred.

No routing protocol is configured on either of the two routers.

Refer to the exhibit. Both routers are using the RIPv2 routing protocol and static routes are undefined.

R1 can ping 192.168.2.1 and 10.1.1.2, but is unable to ping 192.168.4.1.

What is the reason for the ping failure?

The serial interface between two routers is down.


xx The 192.168.4.0 network is not included in the RIP configuration of R2.

RIPv1 needs to be configured.

A sniffer program has captured a packet with a destination IP address of 224.0.0.10. Which protocol

uses this IP address?

RIP

RIPv2

OSPF

xx EIGRP

When would the network administrator use the ip bandwidth‐percent eigrp as‐number percent

command?

xx when there is a low bandwidth connection

when the connection is on a shared medium

when the connection is serial instead of Ethernet

when the link is always busy

Refer to the exhibit. A network technician notes that there are missing EIGRP routes in the routing

tables on each router in this network. Based on the exhibited output, what caused these missing routes?

The holdtime values are mismatched.

xx The autonomous system numbers are mismatched.

The interfaces on the link between RouterC and RouterD are shut down.

An EIGRP neighbor relationship has not been established between RouterA and RouterB.

Refer to the exhibit. What will occur if the link to 192.168.2.0/24 through the FastEthernet0/0 interface

fails?

The DUAL algorithm will place 192.168.2.0/24 in an active state.

The route to 192.168.2.0/24 will be dropped from the routing table.

xx The feasible successor through Serial0/0/0 will be installed in the routing table.

The 192.168.0.1 link through Serial0/0/0 will be recalculated to see if it is a feasible successor.

Packets that are destined for 192.168.2.0/24 will be broadcast through all interfaces until a successor

route is determined.

Refer to the exhibit. Host A is having problems accessing server A. All routers have the same EIGRP

configuration as router RTR_A. What should be done so that host A can access server A?

xx Add the command no auto‐summary on all routers.

Change the network statements to include a wildcard mask.

Adjust the EIGRP hello timers to account for the network delay.

Add the command eigrp log‐neighbor‐changes on all routers.

Refer to the exhibit. R1 and R2 are unable to establish an adjacency. What two configuration changes

will correct the problem? (Choose two.)

Set a lower priority on R2.

xx Configure the routers in the same area.

Set a lower cost on R2 compared to R1.

Add a backup designated router to the network.

xx Match the hello and dead timers on both routers.

Refer to the exhibit. The IP addresses on all interfaces on router R1 were configured before the OSPF

protocol had been enabled on the router. No OSPF router ID was manually configured. Which IP address

will be selected by the router as an OSPF router ID?

xx 10.10.10.1

172.16.1.1

172.16.2.1

192.168.1.1

192.168.100.1

What are two advantages of using a loopback interface on a router with OSPF enabled? (Choose two.)

A loopback interface has a much lower OSPF cost value by default.

xx A loopback interface provides a stable ID because the loopback interface cannot be shutdown.

xx A network administrator has more control over the DR/BDR election by using a loopback interface

over a physical interface.

A loopback interface can be configured with a higher bandwidth value than can a physical interface.

The loopback interface address overrides any physical interface address or configured router‐id value.

Refer to the exhibit. A network administrator has configured OSPF using the following command:

network 192.168.1.32 0.0.0.31 area 0

Which router interface will participate in OSPF?

FastEthernet0/0

FastEthernet0/1

xx Serial0/0/0

Serial0/0/1

Refer to the exhibit. All interfaces are configured with the correct IP addresses and subnet masks. OSPF

has been configured as the routing protocol. During troubleshooting, it is determined that hosts on

network B can ping the Lo0 interface on R1 but are unable to reach hosts on network A. What is the

cause of the problem?

Routers R1 and R2 have incorrect router IDs configured.

Router R1 is unable to form a neighbor relationship with router R2.

Routers R1 and R2 have been configured in different OSPF areas.

xx The configuration of router R1 fails to include network A in the OSPF routing process.

Refer to the exhibit. What does the state "FULL/ ‐" indicate?

The DR/BDR election is currently taking place.

xx The router with router ID 10.112.0.34 and RouterA are on a point‐to‐point network.

RouterA could not form a neighbor relationship with the router with router ID 10.112.0.34.

OSPF hello and dead timers between RouterA and the router with router ID 10.112.0.34 do not match.

Cisco ERouting Routing Protocols Final V40

Documents