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What is an example of a valid MAC address?
A.192.201.63.251
B.
C.0000.1234.FEG
D.
Answer: D.
Explanation: MAC address is a uniquely assigned address to each device on the network. The MAC address is 48 bit in length and are expressed as hexadecimal digit. The first 6 digits specify the manufacturer ID and the remaining 6 are unique to host. No two MAC addresses can be same. In addition MAC addresses are usually comprised of 6 pairs, each pair can be two number, two letters or a combination of a number and a letter.
Incorrect Answers:
A is incorrect; 192.201.63.251 contains to many number and is an IP address.
B is incorrect; there only 6 pair combinations in
C is incorrect; 0000.1234.FEG is short one letter or one number.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) page 20.
Q. 227
Which command would you use to enable IP RIP version 1 on a router?
A.Router RIP network 172.16.1.0 network 10.1.0.1
B.Router RIP network 172.16.0.0 network 10.0.0.0
C.Router RIP
network 172.16.1.0 172.16.1.1 network 10.1.0.0 10.1.1.1
D.Router RIP
network 172.16.1.0 265.255.255.0 Network 10.1.0.0 255.255.0.0
Answer: B.
Explanation: To enable RIP version 1 not only does the router rip command need to be used but also it must be followed by the network command. The network command must be issued for each directly connected network. The network command must be followed by a valid network address.
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