CCNA 2 Module 7 V3.1 Answers

Posted in CCNA 2 - Router and Routing Basics (V3.1)

1. 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.

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

3. When does a distance vector routing protocol set a hold-down timer on a route?

when the metric value of the route decreases

when the route is marked as inaccessible

when the metric value for the route improves

when a regular update is received from a neighboring router

4. The command show ip protocols was just issued and the following line was displayed in the output:
Gateway 192.168.2.1 Distance 100 Last Update 00:00:54

When should the next routing table update be received assuming the configuration uses default values?

6 seconds

24 seconds

30 seconds

36 seconds

90 seconds

5. Which of the following functions are performed by a router as routing information travels through the network? (Choose two.)

advertise supported applications

identify new destinations

calculate packet speed

verify network scalability

identify invalid networks

Refer to the exhibit. Assuming default settings are configured, which routing protocol has been configured on the router?

OSPF

RIP

EIGRP

BGP

Static

7. 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

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.

9. 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

10. The following line was displayed in the output of the show ip route command:
192.168.3.0/24 [120/2] via 192.168.2.2, 00:00:30, Serial0/0
What is the administrative distance of the enabled routing protocol?

100

120

11. How would an administrator configure a static route for use if a primary route failed?

configure the route with a metric greater than the default value

configure the route and the router will activate it as needed

configure the route to activate by using the redistribute static command

configure the route with an administrative distance greater than the default value

12. 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

13. When a routing table update is received by a router in a distance vector network, which of the following occurs?

The hop count metrics for the enclosed routes are incremented.

The update is forwarded to the gateway router for verification.

Path entries are checked for routing loops.

The hop count metrics for the enclosed routes are decremented.

Static routes are updated with the new information.

14. A router has routes to several subnets of a classful network in its routing table. A default route is defined on the router but the ip classless command is disabled. If the router receives packets for a subnet that is not in its routing table but is in the same classful network as the other subnets, what will happen to the packets?

The packets will be forwarded using the default route.

The packets will be forwarded using a route to one of the other subnets of the classful network.

A nonreachable message will be returned to the source.

The packets will be discarded.

The router will generate a new route to the subnetted network.

15.

According to the router output from the show ip route command shown above, which of the following statements are true? (Choose two.)

The metric to network 192.168.8.0 is 24.

The hop count to a device on network 192.168.8.0 is 2.

The total path cost to network 192.168.4.0 is the default value of 16.

The logical address of the next router for network 192.168.1.0 is 192.168.3.1.

The devices on network 192.168.5.0 cannot be reached as indicated by the 'C' label.

16. 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.

17.

The administrator of the network depicted in the graphic would like to decrease the network's convergence time. How can this be accomplished?

disable split horizon on the routers

increase the update interval on the routers

change the RIP holddown timer to 96 seconds

change the RIP holddown timer to 226 seconds

18.

If the passive interface command is enabled on the fa0/0 interface of Router E, which statements are true? (Choose two.)

Router E will send all routing updates via interface fa0/0.

Router E will ignore all routing updates learned via interface fa0/0.

Router E will use routing updates learned via interface fa0/0.

Router E will not send routing updates via interface fa0/0.

19. Which statements describe load balancing when RIP is configured as the routing protocol? (Choose two.)

A router is allowed to take advantage of multiple best paths to a given destination.

RIP uses the round robin approach in load balancing.

RIP load balancing selects a single path to forward all data to the destination even though equal parallel paths exist.

RIP load balancing is based on bandwidth first and then the hop count.

Only one path to a destination can be statically assigned or dynamically calculated.

20. Which statements describe RIP? (Choose three.)

The maximum metric value is 255 hops.

The maximum metric value is 15 hops.

Routing updates occur every 30 seconds.

Routing updates occur every 90 seconds.

It is a distance vector routing protocol.

It is a link state routing protocol.

21. What do distance vector algorithms require each router in the network to send?

a partial routing table to each router in the LAN

a partial routing table to each router in the WAN

the entire routing table to each neighboring router

the entire routing table to each router in the autonomous system

22.

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

RouterB(config)# router rip
RouterB(config-router)# network 198.16.4.0
RouterB(config-router)# network 210.36.7.0
RouterB(config-router)# network 211.168.74.0

RouterB(config)# router rip
RouterB(config-router)# network 198.16.4.0
RouterB(config-router)# network 210.36.7.0
RouterB(config-router)# network 220.17.29.0

23. When does RIP send routing table updates? (Choose two.)

periodically, every 30 seconds

periodically, every 60 seconds

periodically, every 90 seconds

if optionally configured, when topology changes occur (triggered-update)