单项选择题

You are the network administrator at TestKing. TestKing has been assigned the class C IP address 189.66.1.0 by its Internet Service Provider. If you divide the network range by using the 255.255.255.224 subnet mask, how many hosts can be supported on each network?（）

A.14
B.16
C.30
D.32
E.62
F.64

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单项选择题

You are the network administrator at TestKing. TestKing has been provided withthe network address 165.100.27.0/24. The TestKing CEO wants to know how many subnetworks this address provides, and how many hosts can be supported on each subnet.
What would your reply be?（）

A. One network with 254 hosts.
B. 254 networks with 254 hosts per network.
C. 65,534 networks with 255 hosts per network.
D. 30 networks with 64 hosts per network.
E. 254 networks with 65,534 per network.

多项选择题

Which of the following IP hosts would be valid for PC users, assuming that a /27 network mask was used for all of the networks?（）

A.15.234.118.63
B.83.121.178.93
C.134.178.18.56
D.192.168.19.37
E.201.45.116.159
F.217.63.12.192

单项选择题

How would you express the binary number: 10101010 in its decimal and hexadecimal forms?（）

A. Decimal=160, hexadecimal=00
B. Decimal=170, hexadecimal=AA
C. Decimal=180, hexadecimal=BB
D. Decimal=190, hexadecimal=CC