Review Questions

You can find the answers in Appendix B.

1. The Acme Company uses a router named Gateway to connect to its ISP. The address of the ISP router is 206.143.5.2. Which commands could be configured on the Gateway router to allow Internet access to the entire network? (Choose two.)
   1. Gateway(config)#ip route 0.0.0.0 0.0.0.0 206.143.5.2
   2. Gateway(config)#router rip

      Gateway(config-router)#network 206.143.5.0

   3. Gateway(config)#router rip

      Gateway(config-router)#network 206.143.5.0 default

   4. Gateway(config)#ip route 206.143.5.0 255.255.255.0 default
   5. Gateway(config)#ip default-network 206.143.5.0
2. What command will prevent RIP routing updates from exiting an interface but will still allow the interface to receive RIP route updates?
   1. Router(config-if)#no routing
   2. Router(config-if)#passive-interface
   3. Router(config-router)#passive-interface s0
   4. Router(config-router)#no routing updates
3. Which of the following statements are true regarding the command ip route 172.16.4.0 255.255.255.0 192.168.4.2? (Choose two.)
   1. The command is used to establish a static route.
   2. The default administrative distance is used.
   3. The command is used to configure the default route.
   4. The subnet mask for the source address is 255.255.255.0.
   5. The command is used to establish a stub network.
4. What destination addresses will be used by HostA to send data to the HTTPS server as shown in the following network? (Choose two.)

   

   1. The IP address of the switch
   2. The MAC address of the remote switch
   3. The IP address of the HTTPS server
   4. The MAC address of the HTTPS server
   5. The IP address of RouterA's Fa0/0 interface
   6. The MAC address of RouterA's Fa0/0 interface
5. Which of the following is true regarding the following output? (Choose two.)

   04:06:16: RIP: received v1 update from 192.168.40.2 on Serial0/1
   04:06:16:      192.168.50.0 in 16 hops (inaccessible)
   04:06:40: RIP: sending v1 update to 255.255.255.255 via
      FastEthernet0/0 (192.168.30.1)
   04:06:40: RIP: build update entries
   04:06:40:       network 192.168.20.0 metric 1
   04:06:40:       network 192.168.40.0 metric 1
   04:06:40:       network 192.168.50.0 metric 16
   04:06:40: RIP: sending v1 update to 255.255.255.255 via Serial0/1
      (192.168.40.1)

   1. There are three interfaces on the router participating in this update.
   2. A ping to 192.168.50.1 will be successful.
   3. There are at least two routers exchanging information.
   4. A ping to 192.168.40.2 will be successful.
6. Which of the following is the best description of the operation of split horizon?
   1. Information about a route should not be sent back in the direction from which the original update came.
   2. It splits the traffic when you have a large bus (horizon) physical network.
   3. It holds the regular updates from broadcasting to a downed link.
   4. It prevents regular update messages from reinstating a route that has gone down.
7. Which of the following would be true if HostA is trying to communicate to HostB and the LAN interface of RouterC goes down, as shown in the following graphic? (Choose two.)

   

   1. RouterC will use an ICMP to inform HostA that HostB cannot be reached.
   2. RouterC will use ICMP to inform RouterB that HostB cannot be reached.
   3. RouterC will use ICMP to inform HostA, RouterA, and RouterB that HostB cannot be reached.
   4. RouterC will send a destination unreachable message type.
   5. RouterC will send a router selection message type.
   6. RouterC will send a source quench message type.
8. Which statement is true regarding classless routing protocols? (Choose two.)
   1. The use of discontiguous networks is not allowed.
   2. The use of variable-length subnet masks is permitted.
   3. RIPv1 is a classless routing protocol.
   4. IGRP supports classless routing within the same autonomous system.
   5. RIPv2 supports classless routing.
9. Which two of the following are true regarding the distance-vector and link-state routing protocols?
   1. Link state sends its complete routing table out all active interfaces at periodic time intervals.
   2. Distance vector sends its complete routing table out all active interfaces at periodic time intervals.
   3. Link state sends updates containing the state of its own links to all routers in the internetwork.
   4. Distance vector sends updates containing the state of its own links to all routers in the internetwork.
10. Which command displays RIP routing updates?
    1. show ip route
    2. debug ip rip
    3. show protocols
    4. debug ip route
11. What does RIPv2 use to prevent routing loops? (Choose two.)
    1. CIDR
    2. Split horizon
    3. Authentication
    4. Classless masking
    5. Holddown timers
12. A network administrator views the output from the show ip route command. A remote router advertises a network with both RIPv2 and EIGRP. However, only the EIGRP route appears in the routing table. Why is the RIP route to this network not used in the routing table?
    1. EIGRP has a faster update timer.
    2. EIGRP has a lower administrative distance.
    3. RIP has a higher metric value for that route.
    4. The EIGRP route has fewer hops.
    5. The RIP path has a routing loop.
13. You type debug ip rip on your router console and see that 172.16.10.0 is being advertised to you with a metric of 16. What does this mean?
    1. The route is 16 hops away.
    2. The route has a delay of 16 microseconds.
    3. The route is inaccessible.
    4. The route is queued at 16 messages a second.
14. What metric does RIPv2 use to find the best path to a remote network?
    1. Hop count
    2. MTU
    3. Cumulative interface delay
    4. Load
    5. Path bandwidth value
15. The Corporate router receives an IP packet with a source IP address of 192.168.214.20 and a destination address of 192.168.22.3. Looking at the output from the Corporate router, what will the router do with this packet?

    Corp#sh ip route
    [output cut]
    R    192.168.215.0 [120/2] via 192.168.20.2, 00:00:23, Serial0/0
    R    192.168.115.0 [120/1] via 192.168.20.2, 00:00:23, Serial0/0
    R    192.168.30.0 [120/1] via 192.168.20.2, 00:00:23, Serial0/0
    C    192.168.20.0 is directly connected, Serial0/0
    C    192.168.214.0 is directly connected, FastEthernet0/0

    1. The packet will be discarded.
    2. The packet will be routed out the S0/0 interface.
    3. The router will broadcast looking for the destination.
    4. The packet will be routed out the Fa0/0 interface.
16. If your routing table has a static, a RIP, and an EIGRP route to the same network, which route will be used to route packets by default?
    1. Any available route.
    2. RIP route.
    3. Static route.
    4. EIGRP route.
    5. They will all load balance.
17. You have the following routing table. Which of the following networks will not be placed in the neighbor routing table?

    R     192.168.30.0/24 [120/1] via 192.168.40.1, 00:00:12, Serial0
    C     192.168.40.0/24 is directly connected, Serial0
          172.16.0.0/24 is subnetted, 1 subnets
    C        172.16.30.0 is directly connected, Loopback0
    R     192.168.20.0/24 [120/1] via 192.168.40.1, 00:00:12, Serial0
    R     10.0.0.0/8 [120/15] via 192.168.40.1, 00:00:07, Serial0
    C     192.168.50.0/24 is directly connected, Ethernet0

    1. 172.16.30.0.
    2. 192.168.30.0.
    3. 10.0.0.0.
    4. All of them will be placed in the neighbor routing table.
18. Two connected routers are configured only with RIP routing. What will be the result when a router receives a routing update that contains a higher-cost path to a network already in its routing table?
    1. The updated information will be added to the existing routing table.
    2. The update will be ignored, and no further action will occur.
    3. The updated information will replace the existing routing table entry.
    4. The existing routing table entry will be deleted from the routing table, and all routers will exchange routing updates to reach convergence.
19. Which of the following is true about route poisoning?
    1. It sends back the protocol received from a router as a poison pill, which stops the regular updates.
    2. It is information received from a router that can't be sent back to the originating router.
    3. It prevents regular update messages from reinstating a route that has just come up.
    4. It describes when a router sets the metric for a downed link to infinity.
20. Which of the following is true regarding RIPv2?
    1. It has a lower administrative distance than RIPv1.
    2. It converges faster than RIPv1.
    3. It has the same timers as RIPv1.
    4. It is harder to configure than RIPv1.