ENetwork Chapter 2

ENetwork Chapter 2 - CCNA Exploration: Network Fundamentals

Take Assessment - ENetwork Chapter 2 - CCNA Exploration: Network Fundamentals (Version 4.0)

1 What are the key functions of encapsulation? (Choose three.)

*allows modification of the original data before transmission *identifies pieces of data as part of the same communication *enables consistent network paths for communication ensures that data pieces can be directed to the correct receiving end device enables the reassembly of complete messages tracks delay between end devices

2 Which layer encapsulates the segment into packets?

physical data link *network transport

3 Which three statements best describe a Local Area Network (LAN)? (Choose three.)

*A LAN is usually in a single geographical area. *The network is administered by a single organization. The connection between segments in the LAN is usually through a leased connection. The security and access control of the network are controlled by a service provider. *A LAN provides network services and access to applications for users within a common organization. Each end of the network is generally connected to a Telecommunication Service Provider (TSP).

4 What is the proper order of the layers of the OSI model from the highest layer to the lowest layer?

physical, network, application, data link, presentation, session, transport application, physical, session, transport, network, data link, presentation application, presentation, physical, session, data link, transport, network *application, presentation, session, transport, network, data link, physical presentation, data link, session, transport, network, physical, application

5 During the encapsulation process, what occurs at the data link layer?

No address is added. The logical address is added.

*The physical address is added. The process port number is added.

6 Select the statements that are correct concerning network protocols. (Choose three.)

define the structure of layer specific PDU's *dictate how to accomplish layer functions *outline the functions necessary for communications between layers limit hardware compatibility *require layer dependent encapsulations eliminate standardization among vendors

7

Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown? (Choose three.)

Network A -- WAN *Network B -- WAN *Network C -- LAN Network B -- MAN Network C -- WAN *Network A -- LAN

8 Which statements correctly identify the role of intermediary devices in the network? (Choose three.)

*determine pathways for data initiate data communications *retime and retransmit data signals originate the flow of data *manage data flows final termination point for data flow

9 Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.)

* Network Transport * Physical Data Link Session

10 What can be identified by examining the network layer header?

the destination device on the local media * the path to use to reach the destination host

the bits that will be transferred over the media the source application or process creating the data

11

Refer to the exhibit. "Cell A" at IP address 10.0.0.34 has established an IP session with "IP Phone 1" at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device "Cell A?"

the destination device * an end device an intermediate device a media device

12

Refer to the exhibit. Which set of devices contains only end devices?

* A, C, D B, E, G, H C, D, G, H, I, J D, E, F, H, I, J E, F, H, I, J

13 What is the purpose of the TCP/IP Network Access layer?

* path determination and packet switching data representation, encoding, and control reliability, flow control, and error detection detailing the components that make up the physical link and how to access it the division of segments into packets

14 What device is considered an intermediary device?

file server IP phone laptop printer * switch

15 What is a PDU?

corruption of a frame during transmission data reassembled at the destination retransmitted packets due to lost communication * a layer specific encapsulation

16 What is the primary purpose of Layer 4 port assignment?

to identify devices on the local media to identify the hops between source and destination to identify to the intermediary devices the best path through the network to identify the source and destination end devices that are communicating * to identify the processes or services that are communicating within the end devices

17 What is a primary function of the trailer information added by the data link layer encapsulation?

* supports error detection ensures ordered arrival of data provides delivery to correct destination identifies the devices on the local network assists intermediary devices with processing and path selection

18

Refer to the exhibit. Which term correctly identifies the device type that is included in the green area?

source end transfer * intermediary

19

Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?

piping PDU streaming * multiplexing encapsulation

20 Which characteristic correctly refers to end devices in a network?

manage data flows originate data flow retime and retransmit data signals determine pathways for data

21

Refer to the exhibit. What type of network is shown?

WAN MAN * LAN WLAN

1. 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

2. 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.

3.

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.

4.

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 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 198.18.222.0 255.255.255.255 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

WinterPark(config)# ip route 172.191.67.0 255.255.255.0 192.168.146.1

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 s0/0

5. Why is it advisable to enter a next-hop IP address when creating a static route whose exit interface is an Ethernet

network?

5. 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.

6.

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

7. 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

8.

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

9. 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.

10. Which of the following are displayed by the Router# show cdp neighbors command? (Choose three.)

load

platform

reliability

holdtime

local interface

11. 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

administrative distance of 0 and metric of 1

administrative distance of 1 and metric of 0

administrative distance of 1 and metric of 1

12. A router has one static route configured 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.

The remote destination network interface has to be down for 15 minutes of maintenance.

A topology change occurs where the existing next-hop address or exit interface is not accessible.

13.

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

14. Which address can be used to summarize networks 172.16.0.0/24 thru 172.16.7.0/24?

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

15. 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

16.

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

R1(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2

R2(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1

R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.2

R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.1

R1(config)# ip route 10.1.1.0 255.255.255.0 192.168.0.1

R2(config)# ip route 10.1.2.0 255.255.255.0 192.168.0.2

R1(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.1

R2(config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1

17.

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.

18.

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.

19. 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.

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. 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 controllers

show cdp neighbor

22. In your opinion (this has no bearing on your grade), please rate your motivation to do well in this course:

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24. In your opinion (this has no bearing on your grade), please indicate how enthusiastic you are about the content of this

course and the things you’re learning (or have learned):

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