Ccna certification Practice Tests

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 147.  A.  Most dynamic routing protocols will summarize routes. They do this for efficiency, 

so the least number of route statements will need to exist in the routing table. Directly 

connected routes do not perform auto-summarization. Default routing is a technique 

of sending all traffic that does not specifically match to a default router interface. Static 

routing requires manual intervention, and because of this, it does not auto-summarize.

 148.  D.  Static routing requires administrator intervention when a route goes down. Dynamic 

routing will automatically update routes when a route goes down. Directly connected 

routes will be pulled out of the routing table if the link goes down. Default routing is 

generally used for stub networks where the only route out of the network is the default 

route.

 149. C. The 

show ip routes static command will display all of the routes that are 

configured as static routes. The command 

show static routes is incorrect. The 

command 

show ip static routes is incorrect. The command show ip routes is 

incorrect.

 150.  C.  The network ID of 2000:0db8:4400:2300::/64 will be calculated and assigned to 

the directly connected route of Serial 0/0. The network ID will not be shortened to 

2000:0db8:: because there is a network of /64 defined. The IPv6 address of 2000: 

0db8:4400:2300:1234:0000:0000:0000/128 will not be assigned to Serial 0/0 because 

it is a network ID. The network ID should be 2000:0db8:4400:2300::/64; therefore, 

2000:db8:4400:2300:0000/64 is a wrong answer.

 151.  B.  The second address on an interface with the prefix of ff80::/64 is the link-local  

address for Duplicate Address Detection (DAD) and Stateless Address Autoconfiguration. 

Link-local addresses are non-routable, so they will not get added to the routing table. 

Multicast addresses will not get added to the routing tables, but this would not explain 

why the statement does not appear in the route table. Multiple route statements can be 

active for a particular interface. Broadcast addresses will not get added to the routing 

tables, but this would not explain why the statement does not appear in the route table.

 152.  B.  The backup route to network 192.168.3.0/24 is though the gateway of 192.168.2.6. 

However, the administrative distance of a normal static route is 1. So the AD must be 

higher than RIP, which is 120. An AD of 220 is higher than 90, so the RIP route will be 

the main route and the static route will become the backup floating route. The command 

ip route 192.168.2.8 255.255.255.252 192.168.2.6 is incorrect because the 

AD is not higher than 90. The command 

ip route 192.168.3.0 255.255.255.0 

192.168.2.6 90 is incorrect because the AD is 90. The command ip route 

192.168.3.0 255.255.255.0 192.168.2.10 is incorrect.

 153.  C.  The command 

ipv6 address autoconfig default configures the interface of Serial 

0/3/0 with an IP address via SLAAC. When the default subcommand is used, it allows the 

router to inherit the default route discovered via NDP RS/RA messages. The command 

ipv6 address default is incorrect. The command ip route ::/0 serial 0/3/0 is 

incorrect. The command 

ipv6 address slaac is incorrect.

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