單項選擇題

If an Ethernet port on router was assigned an IP address of 172.16.112.1/20, what is the maximum number of hosts allowed on this subnet?（）

A. 1024
B. 2046
C. 4094
D. 4096
E. 8190

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多項選擇題

Which of the following IP addresses fall into the CIDR block of 115.54.4.0/22? （）

A. 115.54.8.32
B. 115.54.7.64
C. 115.54.6.255
D. 115.54.3.32
E. 115.54.5.128
F. 115.54.12.128

單項選擇題

What is the network address for a host with the IP address 201.100.5.68/28?（）

A.201.100.5.0
B.201.100.5.32
C.201.100.5.64
D.201.100.5.65
E.201.100.5.31
F.201.100.5.1