Refer to the exhibit.
A network associate has configured OSPF with the command:
City(config-router)# network 192.168.12.64 0.0.0.63 area 0
After completing the configuration, the associate discovers that not all the interfaces are
participating in OSPF. Which three of the interfaces shown in the exhibit will participate in OSPF
according to this configuration statement? (Choose three.)
A.
FastEthernet0 /0
B.
FastEthernet0 /1
C.
Serial0/0
D.
Serial0/1.102
E.
Serial0/1.103
F.
Serial0/1.104
The “network 192.168.12.64 0.0.0.63″ equals to network 192.168.12.64/26. This network has:
+ Increment: 64 (/26= 1111 1111.1111 1111.1111 1111.1100 0000)
+ Network address: 192.168.12.64
+ Broadcast address: 192.168.12.127
Therefore all interface in the range of this network will join OSPF -> B C D are correct.
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0
network address valid ips
64 0-63
128 65-127 good
192 129-191
256 192-255
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0
Different routers have different naming mechanisms.
Fixed configuration devices (like 2500’s) it’s just a port number (Serial0)
Modular devices, you may have a slot/port number (Serial 0/0
In larger modular devices, you’ll get card/slot/port numberes (Serial 0/0/0)
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