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單項(xiàng)選擇題

Your network uses the172.12.0.0 class B address. You need to support 459 hosts per subnet, while accommodating the maximum number of subnets. Which mask wouldyou use?（）

A.255.255.0.0.
B.255.255.128.0.
C.255.255.224.0.
D.255.255.254.0.

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單項(xiàng)選擇題

Which one of the binary bit patterns below denotes a Class B address?（）

A. 0xxxxxxx
B. 10xxxxxx
C. 110xxxxx
D. 1110xxxx
E. 11110xxx

單項(xiàng)選擇題

What is the IP address range for the first octet in a class B address, in binary form?（）

A.00000111-10001111
B.00000011-10011111
C.10000000-10111111
D.11000000-11011111
E.11100000-11101111
F.None of the above