多項(xiàng)選擇題

Your ISP assigned you a full class B address space. From this, you need at least 300 sub-networks that can support at least 50 hosts each. Which of the subnet masksbelow are capable of satisfying your needs?（）

A.255.255.255.0
B.255.255.255.128
C.255.255.252.0
D.255.255.255.224
E.255.255.255.192
F.255.255.248.0

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單項(xiàng)選擇題
How many usable IP addresses can you get from a conventional Class C address?（）
A.128
B.192
C.254
D.256
E.510
多項(xiàng)選擇題
You have a class B network with a 255.255.255.0 mask. Which of the statements below are true of this network?（）
A. There are 254 usable subnets.
B. There are 256 usable hosts per subnet.
C. There are 50 usable subnets.
D. There are 254 usable hosts per subnet.
E. There are 24 usable hosts per subnet.
F. There is one usable network.