Ccna certification Practice Tests

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Appendix 

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  Answers to Practice Test Questions

 108.  B.  The command 

show ip interfaces brief will display all of the interfaces and 

their configured IP addresses. The command 

show ip is incorrect. The command show 

interfaces is incorrect. The command show ip brief is incorrect.

 109.  A.  A route for the interface will not be populated in the routing table until the interface 

is in an up/up status. If the link was disconnected, this would create the same symptoms. 

Although the speed could be incorrect, the route would still be populated in the route 

table. Setting the bandwidth on an interface will only help routing protocols such as 

EIGRP make better route decisions. Saving the configuration will have no effect on route 

entries in the route table.

 110.  C.  Static routing is suited for small networks, where the central admin has a good 

understanding of the network layout. It does reduce router-to-router communications 

because the overhead of routing dynamic protocols will not use up bandwidth. Adding 

networks in a static routing environment can be a time-consuming task for a network 

administrator because of all the routers that will need to be updated. Static routing is 

best suited for small networks and not large networks. There is not an advantage of easy 

configuration or easier accessibility by any network admin with static routing.

 111.  C.  When you configure a static route, it is temporarily stored in the running-

configuration. After it is saved by using 

copy running-config startup-config, it is 

stored in the startup configuration and can survive reboots. The startup configuration is 

located on the NVRAM. When a router loads, the IOS is loaded into RAM from the flash. 

The router will then load the startup configuration into RAM. The routing database is 

also held in RAM.

 112.  C.  The easiest way to accomplish this is to super-net the addresses together. The network 

of 192.168.0.0/30 or 255.255.240.0 would capture traffic for the range of 192.168.0.1 

to 192.168.3.254. The command 

ip route 192.168.0.0 255.255.0.0 198.43.23.2 

is incorrect. The command 

ip route 192.168.0.0 255.255.255.0 198.43.23.2 is 

incorrect. The command 

ip route 192.168.0.0 255.255.0.240 198.43.23.2  

is incorrect.

 113.  B.  Secondary routes with higher administrative distance (AD) are used for failover. If the 

physical interface fails, the route statement will be taken out of the routing table. Then 

the second route will become active. Route tables unfortunately do not adjust based upon 

the success or failure of a packet being routed. A router will not know to use a secondary 

route if the primary route fails to route a packet. If a dynamic protocol is used, such as 

OSPF or EIGRP, the routing protocol can sense high amounts of traffic and adjust route 

paths. However, statically configured routes are not managed by these dynamic routing 

protocols; therefore, the secondary route will not be used. A router will not be aware of 

routing loops; it will not respond with a change in the routing of packets.

 114.  A.  The IP address of 208.43.34.17/29 belongs to the network of 208.43.34.16/29. In 

addition to the statement for the network that owns the IP address, the individual IP 

address will be configured as a local route with a /32. All other answers are incorrect.

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Chapter 3: IP Connectivity (Domain 3)