Ccna certification Practice Tests

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 211.  D.  In order to form an adjacency, the area IDs must match. In this exhibit, Router A has 

an area of 0 and Router B has an area of 1 configured. The hello and dead timers on both 

routers match at 10 seconds for the hello and 40 seconds for the dead timer. The existence 

of a designated router (DR) will not restrict the two routers from forming an adjacency. 

The process IDs do not need to match for the two routers to form an adjacency.

 212.  C.  The command 

default-information originate will propagate a default route 

originating from router 172.16.1.1. All OSPF routers will calculate their default routes 

back to this router. The command 

ip route 0.0.0.0 0.0.0.0 serial 0/0  

is incorrect. The command 

default-route originate is incorrect. The command 

network 0.0.0.0 0.0.0.0 area 0 is incorrect.

 213.  A.  Bandwidth is always specified in kilobits per second (Kb/s), so 2.048 Mb/s would be 

2,048,000 bits per second, or 2,048 Kb/s. The command 

bandwidth 2048000000 is 

incorrect because it is configured in Kb/s, not b/s, although this would be 2.048 gigabits. 

The command 

bandwidth 2.048 is incorrect because it cannot be notated with a period. 

The command 

bandwidth 2048000 is incorrect because it is configured in Kb/s, not b/s.

 214.  D.  All routers by default have an OSPF priority of 1. If you set the priority to 0, the router 

will never become a designated router (DR). This command must be set in the interface. 

The command 

no ospf designated is incorrect regardless of which configuration 

prompt it is configured in. The command 

passive interface gi 0/0 is incorrect.

 215.  B.  The command 

interface loopback 0 will configure and create a pseudo interface 

called loopback 0. The loopback number must be specified, and the loopback should 

not overlap a loopback already configured. The command 

ip address 192.168.1.2 

255.255.255.0 will configure the IP address on the loopback interface. The command  

ip address 192.168.1.2/24 is an incorrect command because you cannot configure 

CIDR notation in this prompt. When configuring loopback interfaces, you must supply a 

number between 0 and 1023.

 216.  D.  Both the customer edge (CE) routers and the provider edge (PE) routers can host area 

0. However, the service provider must support area 0, called the super backbone, on its 

PE routers since all areas must be connected to area 0. The customer chooses whether 

the CE participates in area 0. Although the PE and the CE can host area 0, they are not 

exclusively configured for area 0. The CE does not need Generic Routing Encapsulation 

(GRE) to support OSPF.

 217.  A.  The Open Shortest Path First (OSPF) priority for a router is a value of 1. This priority 

is used when electing a designated router (DR) and backup designated router (BDR). The 

higher the value, the higher the chances of the router becoming a DR or BDR. All other 

answers are incorrect.

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