单项选择题

The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?（）

A. 1 network with 254 hosts
B. 4 networks with 128 hosts
C. 2 networks with 24 hosts
D. 6 networks with 64 hosts
E. 8 networks with 36 hosts

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多项选择题

Your ISP has assigned you the following IP address and subnet mask:
IP address: 199.141.27.0
Subnet mask: 255.255.255.240
Which of the following addresses can be allocated to hosts on the resulting subnet?（）

A.199.141.27.2
B.199.141.27.175
C.199.141.27.13
D.199.141.27.11
E.199.141.27.208
F.199.141.27.112

多项选择题

Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet?（）

A.16.23.118.63
B.87.45.16.159
C.92.11.178.93
D.134.178.18.56
E.192.168.16.87
F.217.168.166.192

单项选择题

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.