Ccna Chapter 4

1. What metric does the RIP routing protocol consider to be infinity?

0

15

16

224

255

2. What is a routing loop ?

A packet bouncing back and forth between two loopback interfaces on a router

A condition where 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 or routes from one routing protocol into another

3. Which three routing protocols are distance vector routing protocols ? (choose three)

RIP v1

EIGRP

OSPF

IS-IS

RIP v2

Submit

4. What 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

Submit

5. Refer to the exhibit.The routers in this network are running RIP.Router A has not received an update from Router N 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 there 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. 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 acceptd

The time between updates is split in half to speed convergence

7. 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

8. Three routers running a distance vector routing protcol 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 adjacencies.

They will send updates that include only directly connected routes to their directly connected neighbors.

They will broadcast their full routing table to all routers in the network

9. 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 interfaces.

It prevents the synchronization of routing updates by causing the router to skip every other scheduled update time

10. What is the purpose of the TTL filed in the IP header ?

Used to mark routers as unreachable in updates sent to other to routes

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

11. 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

12. 2refer to the exhibit.what path will packets from 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

Packets will alternate paths depending on the order they arrive at router A .

13. What does the RIP holdown timer do ?

Ensures an invalid route has a metric of 15

Prevents a router from sending any 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

14. 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 preveevention mechanism is in effect ?

Split horizon

Error condition

Hold -down timer

Route poisioning

Count to infinity

15. 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

16. 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 0.0.0.0

Broadcasts are sent to 255.255.255.255

Updates contain the entire network topology

Submit

17. 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

Submit

CCNA Chapter 4

1. What metric does the RIP routing protocol consider to be infinity?

2.

What first name or nickname would you like us to use?

2. What is a routing loop ?

3. Which three routing protocols are distance vector routing protocols ? (choose three)

4. What two conditions are most likely to cause a routing loop? (choose two )

5. Refer to the exhibit.The routers in this network are running RIP.Router A has not received an update from Router N in over three minutes .How will Router A respond?

6. Which of the following methods does split horizon use to reduce incorrect routing information ?

7. Which event will cause a triggered update?

8. Three routers running a distance vector routing protcol lost all power, including the battery backups.when the routers reload what will happen ??

9. Which statement is true regarding cisco's RIP_JITTER variable ?

10. What is the purpose of the TTL filed in the IP header ?

11. Refer to the exhibit if all routers are using RIP,how many rounds of updates will occur before all routers know all networks

12. 2refer to the exhibit.what path will packets from 192.168.1.0/24 network travel to reach the .10.0.0.0/8 network if RIP is the active routing protocol?

13. What does the RIP holdown timer do ?

14. 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 preveevention mechanism is in effect ?

15. Which of the following statements are correct about RIP?

16. Which two statements are true regarding the function of the RIPv1 routing updates? (choose two)

17. Which of the following can exist in a distance vector network that has not converged? (choose three)