8/9/2019 7 - 8 Class CCNA2

1/6

Erouting v4.0 Chapter 7

Expect minimum percentage: 100%

1. 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?

ans:

Rip version 2 will auto summarize routes by default.

2. What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.)

ans:

RIP version 2 supports VLSM.

RIP version 2 supports routing update authentication.

3. 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?

ans:

RIPv1 is unable to route to discontiguous subnets of a major network.

4. Refer to the exhibit. What effect will the commands that are shown have on RIP updates for Router1?

ans:Only version 2 updates are sent to 224.0.0.9.

5. 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?

ans:

The network address for Loopback1 overlaps with an already configured interface address.

6. What is the maximum network diameter permitted by the default metric of RIPv2?

ans:

15 hops

7. 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?

ans:

The CHI router will install a route to the 192.168.0.0/16 network in its routing table.

8. Refer to the exhibit. What can be concluded from the output shown in the exhibit?

ans:

The no auto-summary has not been configured on this router.

9. 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?ans:

A connected route to the 10.16.1.128/27 network is added.

10. How are RIP v1 and RIP v2 similar to one another? (Choose three.)

ans:

They both use hop count as a metric.

They both have the same metric value for infinite distance.

They both use split horizon to prevent routing loops.

11. 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?

ans:

Version 1 and 2 updates will be received and the version 2 updates will not be sent.

12. 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

http://answersforccna.blogspot.com/2009/03/erouting-v40-chapter-7.htmlhttp://answersforccna.blogspot.com/2009/03/erouting-v40-chapter-7.html

8/9/2019 7 - 8 Class CCNA2

2/6

Router1(config-router)# default-information originate on Router1. How will this affect the network?

ans:

propagates the default route to all routers in the network

13. 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?

ans:

Configure RIPv2 on routers.

14. Refer to the exhibit. Which command on which router will allow Router1 to learn about the 192.168.0.0/20

network?ans:

Router2(config-router)# version 2

15. 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.)

ans:

10.0.0.0/8

172.16.0.0/12

192.168.0.0/16

16. 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 theproblem?

ans:

VLSM is not supported by RIPv1.

17. Refer to the exhibit. Which command will allow Router2 to learn about the 192.168.16.0/28 network?

ans:

Router1(config-router)# network 192.168.16.0

18. What field was added to the RIP message header by RFC 1723 to add support for VLSM and CIDR?

ans:

subnet mask

19. What are two functions of the network command used when configuring routing protocols? (Choose two.)ans:

identifies which networks will be included in the routing updates

determines which interfaces can send and receive routing updates

8/9/2019 7 - 8 Class CCNA2

3/6

8 ZESTAWC

CNA Exploration 2 - Module 8Exam Answers Version 4.0

1. 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.

2. 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

3. 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

4. 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

5. 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

6. 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

http://ccna-answers.blogspot.com/2008/12/ccna-exploration-2-module-8-exam_15.htmlhttp://ccna-answers.blogspot.com/2008/12/ccna-exploration-2-module-8-exam_15.htmlhttp://ccna-answers.blogspot.com/2008/12/ccna-exploration-2-module-8-exam_15.htmlhttp://ccna-answers.blogspot.com/2008/12/ccna-exploration-2-module-8-exam_15.htmlhttp://ccna-answers.blogspot.com/2008/12/ccna-exploration-2-module-8-exam_15.html

8/9/2019 7 - 8 Class CCNA2

4/6

forward the packet via the route to 10.16.1.64

use the default route

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

3

4

5

6

7

8

8. 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

9. 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

10. 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

11. 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

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

12. The router receives a packet that is destined for a host with the address 192.168.0.58. Whichroute would this router use to forward the packet?

router use to forward the packet?

the static route

the OSPF route

the EIGRP route

the RIP route

13.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.

8/9/2019 7 - 8 Class CCNA2

5/6

14. 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.

15. 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

16. 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

17. 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

18. Refer to the exhibit. What protocol was used to distribute the routing information for the

network 172.16.1.4?

RIPv1

RIPv2

EIGRP

OSPF

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

Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?ANS: 7

Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the staticroute in the routing table that matches the destination network for this packet, what does the router do next?

ANS: Performs reqursive lookup to find the exit interface used to forward packets

8/9/2019 7 - 8 Class CCNA2

6/6

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?

ANS: send packet out Serial 0/0/1

Refer to the exhibit. Which statement correctly describes this network?ANS: There is at least one parent and one child route

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?ANS: 172.16.0.0/25 because it is the first level 1 route

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

router B do?

ANS: use the default route