DrSent Practice Final 2013 Ver4.1

DrSent Practice Final Exam

1.

Refer to the exhibit. Which access list, when applied inbound to the Fa0/0 interface of router R1,

will prevent all IP traffic from the 172.16.1.16 network from entering the 172.16.1.32 network

while allowing all other traffic?

access-list 101 deny tcp 172.16.1.16 0.0.0.7 172.16.1.32 0.0.0.15

access-list 101 permit ip any any

access-list 101 deny ip 172.16.1.16 0.0.0.15 172.16.1.32 0.0.0.7


access-list 10 deny ip 172.16.1.0 0.0.0.255 172.16.1.32 0.0.0.255

access-list 10 permit tcp any any

access-list 101 deny tcp 172.16.1.16 0.0.0.15 172.16.1.32 0.0.0.7

http://goestoetkj3.files.wordpress.com/2013/01/q1.jpg


2.

Refer to the exhibit. R1 is connected to the Internet through its serial 0/0/0 interface. Hosts on

the 192.168.100.0/24 LAN on R1 cannot communicate with hosts on the Internet. What two

NAT configuration issues might explain this failure? (Choose two.)

The ip nat pool command has not been applied correctly.

The inside interface has not been defined on R1.

The access list does not include the group of IP addresses that are supported by the inside

network.

The ip address that is assigned to the serial 0/0/0 interface is incorrect.

The outside interface has not been defined on R1.

3.


Refer to the exhibit. Routers R1 and R2 are directly connected via interface Serial0/0 on each

router but they are unable to communicate. What could be the cause of the problem?

The MTU is too high on both routers.

The routers are not on the same network.

A loopback address is required on both routers.

The routers are not using the same encapsulation.

Both interfaces require a no shutdown command to be issued.

4.


Refer to the exhibit. All routes in the exhibit are available to a router. Which two routes will be

placed into the routing table? (Choose two.)

A

B

C

D

E

F

5.

Refer to the exhibit. What is the purpose of assigning the IP address 192.168.30.1 to an access

layer switch?

to assign a default gateway to the hosts that are connected to the switch

to allow hosts on the same LAN to connect to each other



to allow remote management of the switch

to allow inter-VLAN communication

6.

Refer to the exhibit. Routers R1 and R2 cannot communicate. What could be the cause of the

problem?

Usernames on both routers R1 and R2 are misconfigured.

The passwords are identical on both routers.

The encapsulation command is entered incorrectly.

The IP addressing scheme has incorrect subnet masks.

7.


Refer to the exhibit. What is represented by the Null0 route for the 128.107.0.0 network?

a child route that is defined

a parent route that is defined and sourced from a physical interface

a summary route for advertising purposes, not an actual path

the result of the no auto-summary command on a router

8. Which command should a network administrator issue to disable default summarization in an

EIGRP network?

Router(config-router)# no ip summary-address

Router(config-if)# no ip summary-address

Router(config-if)# no auto-summary

Router(config-router)# no auto-summary

9.


Refer to the exhibit. What is the administrative distance for OSPF routes?

0

1

65

110

120

128

10.


Refer to the exhibit. Which two statements are true about the output that is shown? (Choose two.)

The feasible distance to network 172.20.2.0 is 2172416.

The reported distance to network 172.20.4.0 is 2172416.

Serial 0/0/1 represents the next hop interface for network 172.20.4.0.

Two routes in the routing table would be used to load-balance traffic to network 172.20.3.0.

The letter P represents that the algorithm is calculating and the routes are not in use.

11.


Refer to the exhibit. Both routers are configured to use the EIGRP routing protocol. However,

when the show ip eigrp neighbors command is issued at R1, the output displays that the routers

are unable to establish adjacency. What is the possible cause of this problem?

EIGRP routing is incorrectly configured at R1.

The autonomous system number is the same on both routers.

The no auto-summary command is applied on both routers.

The IP address of the serial interfaces of both routers is incorrectly configured.

12.



Refer to the exhibit. The network administrator wants to restrict the Production network from

accessing the HR network. All other traffic will have access to all networks. Which combination

of interface and direction should the administrator use to apply the ACL?

Fa0/1, out

Fa1/0, out

Fa0/1, in

Fa1/0, in

13.

Refer to the exhibit. What can be determined from the output of the show ip nat translation

command?

Dynamic NAT addressing is enabled.

NAT overload is enabled on router R1.

The outside local and outside global addresses have been misconfigured.

The outside global address has been dynamically assigned from a NAT pool.

14.


Refer to the exhibit. R1 is configured for inter-VLAN communication as displayed. PC1 is able

to ping PC2 but unable to ping PC3. What is the cause of this problem?

PC3 and the FastEthernet0/0 interface of R1 are not on the same subnet.

Fa0/1 is configured for access mode.

Fa0/4 must be configured as a trunk.

PC1 and the switch are not on the same subnet.

15. A company is using a Class B IP addressing scheme and expects to need as many as 150

networks. What is the correct subnet mask to use with the network configuration?

255.255.0.0

255.255.240.0

255.255.254.0

255.255.255.0

255.255.255.128


255.255.255.192

16. What will allow a LAN switched network to maintain VLAN configuration consistency

across the network?

Enable CDP on all switch access ports.

Configure DTP on all trunk ports.

Enable STP on all switches.

Configure VTP on all switches.

17. Assuming VLSM is not being used, what impact will adding the command ip route

172.16.64.0 255.255.240.0 serial0/0 have on a router that is already operational in a network?

All packets with a destination address between 172.16.64.1 and 172.16.80.254 will be forwarded

out serial0/0.

All packets with a destination address between 172.16.64.1 and 172.16.255.254 will be

forwarded out serial0/0.


out serial0/0.


out serial0/0.

18. Which WAN connection method uses a PVC?

leased line

ISDN

DSL

Frame Relay

19.

Refer to the exhibit. A network technician is attempting to manage a switch that has an IP

address that has been assigned to the default management VLAN. What is a possible reason that

the Telnet session fails from a PC connected to a port that is assigned to VLAN 10?

The incorrect encapsulation command is used.

There is no encapsulation dot1q 1 configuration on the FastEthernet 0/0 port.

The default gateway address of the switch must be in the same network as the PC.

There is no subinterface associated with the default management VLAN on the switch.

20.


Refer to the exhibit. All routers are configured with RIPv2. What will be the result of the

exhibited configuration?

All static routes on R3 will be propagated to R1 and R2.

The default route on R3 will be propagated to R2 but not R1.

Only the default route on R3 will be propagated to R1 and R2.

No static routes will be propagated until a no auto-summary command is entered on R3.

21.


Refer to the exhibit. Switch1 and Switch2 are connected to each other via a trunk link that has

been tested and is working properly. Why is VTP unable to propagate VLANs from one switch

to the other?

The revision number is different on both switches.

Both switches are in server mode.

The VTP domain name is different on both switches.

The VTP pruning mode is disabled.

22. All OSPF routers in a network have been configured to use MD5 authentication. Which two

statements describe the reasons for using this technology? (Choose two.)

All data passing between OSPF routers will be encrypted.

MD5 authentication ensures the integrity of the network information.

MD5 authentication optimizes bandwidth use on point-to-point links.

MD5 authentication will ensure that only routers with matching keys share routing updates.


The MD5 key will be sent to adjacent neighbors in plain text, after which OSPF updates will be

encrypted.

23. A company requests the service of an ISP for Internet access. Which device is needed to

connect the company router to the ISP by a T1 or E1?

CSU/DSU

DMZ router

DMZ switch

web server

24.

Refer to the exhibit. None of the hosts in network A are able to access the Internet. How can this

problem be resolved?

Configure dynamic NAT instead of PAT.

Configure the access list for the correct network.

Include the ip nat pool command in the configuration.

Configure the ip nat inside command on the correct interface.


25. Once the root bridge has been determined, which two items are assigned to every other

switch before STP converges a switched network? (Choose two.)

VLAN ID

root port

full-duplex port

designated port

discarding port

26.

Refer to the exhibit. Assuming that the RIPv1 routing protocol is enabled and all networks have

been correctly configured on each router, which statement is true?

All packets from H1 that are destined to H2 will arrive at H2.

None of the packets from H1 that are destined to H2 will arrive at H2.

Approximately half the traffic from H1 that is destined to H2 will reach R3.

Some of the packets from H1 that are destined to H2 will be sent to the switch that is connected

to network 192.168.3.64/26.


27. What information is displayed in the output of the show version command on a router?

interface addresses

routing table entries

amount of flash memory

configured routing protocols

28. What factor is important to consider when configuring manual summarization with EIGRP?

EIGRP authentication must be enabled.

Networks that are being summarized must be contiguous.

Networks that are being summarized must use the same subnet mask.

Summarization must be configured the same on all interfaces.

29. An organization is planning to expand by adding five new branches. After the expansion, it

will require secured, full-time, and simultaneous connectivity for its new branch offices with the

central office. There is only one port available on the central office router. Which WAN

technology can be used in this situation?

PPP

ISDN

Frame Relay

analog dialup

30. A network administrator wishes to log ACL messages on a remote server. Which two

procedures should be completed for the remote logging to be successful? (Choose two.)

Configure logging to a syslog server IP address.

Configure logging to the router loopback IP address.

Ensure that logging to the console is configured.

Apply the terminal monitor command on the router.

Restrict remote access by applying an ACL to all VTY lines.

Verify that the clock is set to the correct date, time, and time zone.

31.

Refer to the exhibit. A network technician has added router R0 to an existing network that

contains router R1. R0 is configured with EIGRP and is connected to R1 via the Fa0/0 interface

of each router. After completing an analysis of the network, the technician notices that the routes

to the networks that are supported by routers R0 and R1 are not being exchanged. What is a

possible cause for this failure?

R0 was configured with the wrong autonomous system number.

FastEthernet interfaces on R0 are in a shutdown state.

Interface Fa0/0 on R0 is configured as a passive interface.


Interface Fa0/0 on R1 is configured as a passive interface.

32.

Refer to the exhibit. Both switches have been configured with static VLANs. Host A and host C

belong to one VLAN and host B and D belong to another VLAN. However, the hosts within the

same VLAN are unable to communicate with each other.

Which troubleshooting approach should be followed to resolve this problem?

Explore the possibility of adding a router to the network.

Ensure that both switches are configured for the same native VLAN.

Ensure that the ports connecting the two switches are configured as trunk ports.

Ensure that both switches are configured with an IP address in the same subnet.

33.


Refer to the exhibit. In order to establish a default route to the ISP, which two commands need to

be issued on R2 so that R1 receives a default route from R2? (Choose two.)

R2(config-router)# area 0 range 0.0.0.0 0.0.0.0

R2(config)# ip default-gateway 209.165.201.1

R2(config-router)# default-information originate

R2(config)# ip route 0.0.0.0 0.0.0.0 209.165.201.2

R2(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0/1

R2(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0/0

34. What is one major difference between RIPv1 and RIPv2?

RIPv2 has a higher maximum hop count than RIPv1.

RIPv1 utilizes broadcasts. RIPv2 utilizes multicasts.

RIPv1 supports discontiguous networks. RIPv2 does not.

RIPv1 updates are exchanged more often than RIPv2 updates.

35.


Refer to the exhibit. R1 is using the default OSPF operation. Which IP address will be used as

the router ID of R1?

192.168.201.1

172.16.1.1

10.10.10.1

10.1.1.1

36. Which two criteria are used by STP to select a root bridge? (Choose two.)

memory size

bridge priority

number of ports

switch location

switching speed

base MAC address

37. What are two characteristics of an extended ACL? (Choose two.)


IP is used to specify TCP traffic only.

IP is used to specify TCP and UDP traffic only.

IP is used to specify all TCP/IP protocols including TCP, UDP, ICMP and routing protocols.

Traffic can be filtered on source address only.

Traffic can be filtered on source and destination address only.

Traffic can be filtered on source and destination address, protocol, and specific port number.

38. Which two interface values does EIGRP use by default to calculate the metric? (Choose two.)

bandwidth

delay

load

hop count

reliability

39. What is a limitation of RIPv1?

RIPv1 cannot run on networks that are using RIPv2.

RIPv1 does not send subnet mask information in its updates.

RIPv1 is not widely supported by networking hardware vendors.

RIPv1 requires enhanced router processors and extra RAM to function effectively.

RIPv1 consumes excessive bandwidth by multicasting routing updates using a Class D address.

40. What is a feature of PAP authentication?

It uses a three-way handshake with encryption.

It sends the username/password pair across the link in clear text.

It provides protection against playback attack through a variable challenge value.

It designates the called device to control the frequency and timing of the authentication.

41. Which element of the hierarchical design model provides a connection point for end-user

devices to the network?

core layer

edge device

access layer

enterprise edge

distribution layer

42.


Refer to the exhibit. The network administrator has configured R1, R2, and R3 to use RIPv2, and

the network is fully converged. The hosts on the internal network are able to access R2, but they

are unable to access the Internet.

How can the administrator solve this problem?

Configure a default route on R3 and propagate it via the use of RIPv2 to all routers.

Configure a default route on R2 and propagate it via RIPv2 to routers R1 and R3.

Configure a default route on the ISP, and it will be automatically propagated to all routers.

Configure a default route on R1, and it will be automatically propagated to all routers.

43.

Refer to the exhibit. Which commands would be used to configure OSPF on router R1?

R1(config)# router ospf 1

R1(config-router)# network 172.16.1.16 255.255.255.248 area 0























44. Which three IP addresses are valid host addresses in the 10.200.0.0/20 network? (Choose

three.)

10.200.11.69

10.200.16.1

10.200.0.255

10.201.0.55

10.200.15.240

10.200.30.29

45. Which route will be excluded from the updates that are sent to the neighbor routers?

R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:12, FastEthernet0/1




46.

Refer to the exhibit. If R4 is announcing all shown internal networks as a summary address to the

ISP, which summary address will be most specific?

192.168.1.0/22

192.168.4.0/21

192.168.6.0/23

192.168.8.0/21

192.168.4.0/22

47.


Refer to the exhibit. OSPF has been configured on all routers. What is the DR/BDR status

immediately after all routers have converged?

R1 is the DR. R3 is the BDR.





48. What is considered a best practice when configuring ACLs on vty lines?

Use only extended access lists.

Place identical restrictions on all vty lines.

Apply the ip access-group command inbound.

Remove the vty password since the ACL restricts access to trusted users.


49.

Refer to the exhibit. How many routers have established OSPF adjacencies with R1?

2

4

5

7

50.


Refer to the exhibit. An administrator is adding a new router to the network. The IP address

192.168.13.6/30 has been assigned to the connecting serial interface on R2. What IP address

must the administrator assign to the serial interface of the new router?

192.168.13.4/30

192.168.13.5/30

192.168.13.7/30

192.168.13.58/30

192.168.13.61/27

192.168.13.63/27


DrSent Practice Final 2013 Ver4.1

Documents

ip addressing scheme

serial 0 0 0 interface

default management vlan

routing table

ip addresses

md5 authentication

summary command

ip address