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IP Routing, Networking Quiz


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IP Routing, Networking Quiz - Question 1

Which of the following statements are true regarding the command ip route 172.16.4.0 255.255.255.0 192.168.4.2?

  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.

Detailed Solution for IP Routing, Networking Quiz - Question 1 Although answer D almost seems right, it is not; the mask is the mask used on the remote network, not the source network. Since there is no number at the end of the static route, it is using the default administrative distance of 1.
IP Routing, Networking Quiz - Question 2

Which command displays RIP routing updates?

Detailed Solution for IP Routing, Networking Quiz - Question 2 The debug ip rip command is used to show the Internet Protocol (IP) Routing Information Protocol (RIP) updates being sent and received on the router.
IP Routing, Networking Quiz - Question 3

Which statement is true regarding classless routing protocols?

  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.

Detailed Solution for IP Routing, Networking Quiz - Question 3 Classful routing means that all hosts in the internetwork use the same mask. Classless routing means that you can use Variable Length Subnet Masks (VLSMs) and can also support discontiguous networking.
IP Routing, Networking Quiz - Question 4

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
Detailed Solution for IP Routing, Networking Quiz - Question 4 The network 10.0.0.0 cannot be placed in the next router's routing table because it already is at 15 hops. One more hop would make the route 16 hops, and that is not valid in RIP networking.
IP Routing, Networking Quiz - Question 5

What is split horizon?

Detailed Solution for IP Routing, Networking Quiz - Question 5 A split horizon will not advertise a route back to the same router it learned the route from.
IP Routing, Networking Quiz - Question 6

What command is used to stop RIP routing updates from exiting out an interface but still allow the interface to receive RIP route updates?

Detailed Solution for IP Routing, Networking Quiz - Question 6 The (config-router)#passive-interface command stops updates from being sent out an interface, but route updates are still received.
IP Routing, Networking Quiz - Question 7

Two connected routers are configured 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?

Detailed Solution for IP Routing, Networking Quiz - Question 7 When a routing update is received by a router, the router first checks the administrative distance (AD) and always chooses the route with the lowest AD. However, if two routes are received and they both have the same AD, then the router will choose the one route with the lowest metrics, or in RIP's case, hop count.
IP Routing, Networking Quiz - Question 8

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?

Detailed Solution for IP Routing, Networking Quiz - Question 8 You cannot have 16 hops on a RIP network by default. If you receive a route advertised with a metric of 16, this means it is inaccessible.
IP Routing, Networking Quiz - Question 9

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
Detailed Solution for IP Routing, Networking Quiz - Question 9 Since the routing table shows no route to the 192.168.22.0 network, the router will discard the packet and send an ICMP destination unreachable message out interface FastEthernet 0/0, which is the source LAN where the packet originated from.
IP Routing, Networking Quiz - Question 10

If your routing table has a static, a RIP, and an IGRP route to the same network, which route will be used to route packets by default?

Detailed Solution for IP Routing, Networking Quiz - Question 10 Static routes have an administrative distance of 1 by default. Unless you change this, a static route will always be used over any other found route. IGRP has an administrative distance of 100, and RIP has an administrative distance of 120, by default.
IP Routing, Networking Quiz - Question 11

What is route poisoning?

Detailed Solution for IP Routing, Networking Quiz - Question 11 Another way to avoid problems caused by inconsistent updates and to stop network loops is route poisoning. When a network goes down, the distance-vector routing protocol initiates route poisoning by advertising the network with a metric of 16, or unreachable (sometimes referred to as infinite).
IP Routing, Networking Quiz - Question 12

Which of the following is true regarding RIPv2?

Detailed Solution for IP Routing, Networking Quiz - Question 12 RIPv2 is pretty much just like RIPv1. It has the same administrative distance and timers and is configured just like RIPv1.
IP Routing, Networking Quiz - Question 13

A network administrator views the output from the show ip route command. A network that is advertised by both RIP and IGRP appears in the routing table flagged as an IGRP route. Why is the RIP route to this network not used in the routing table?

Detailed Solution for IP Routing, Networking Quiz - Question 13 RIP has an administrative distance (AD) of 120, while IGRP has an administrative distance of 100, so the router will discard any route with a higher AD than 100.
IP Routing, Networking Quiz - Question 14

What does RIPv2 use to prevent routing loops?

  1. CIDR
  2. Split horizon
  3. Authentication
  4. Classless masking
  5. Holddown timers
Detailed Solution for IP Routing, Networking Quiz - Question 14 RIPv2 uses the same timers and loop-avoidance schemes as RIPv1. Split horizon is used to stop an update from being sent out the same interface it was received on. Holddown timers allow time for a network to become stable in the case of a flapping link.
IP Routing, Networking Quiz - Question 15

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 on periodic time intervals.
  2. Distance vector sends its complete routing table out all active interfaces on 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.
Detailed Solution for IP Routing, Networking Quiz - Question 15 The distance-vector routing protocol sends its complete routing table out all active interfaces at periodic time intervals. Link-state routing protocols send updates containing the state of its own links to all routers in the internetwork.
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