單項(xiàng)選擇題The network 172.12.0.0 needs to be divided into subnets where each subnet has the capacity of 458 IP addresses.What would be the correct subnet mask to accomplish this division keeping the number of subnets at the maximum? （）

A.255.255.254.0
B.255.255.254.1
C.255.255.254.2
D.255.255.254.3


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3.多項(xiàng)選擇題Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts?（）

A.15.234.118.63
B.92.11.178.93
C.134.178.18.56
D.192.168.16.87
E.201.45.116.159
F.217.63.12.192

4.多項(xiàng)選擇題Which of the following host addresses are member of networks that can be routed across the public Internet? （）

A. 10.172.13.65
B. 172.16.223.125
C. 172.64.12.29
D. 192.168.23.252
E. 198.234.12.95
F. 212.192.48.254

5.多項(xiàng)選擇題Which connections allow the use of full-duplex Ethernet?（）

A. Switch to host
B. Switch to switch
C. Hub to hub
D. Switch to hub
E. Host to host

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