A. applicationB. internetC. networkD. transportWhere do……

单项选择题How many addresses for hosts will the network 124.12.4.0 22 provide?（）

A. 510
B. 1022
C. 1024
D. 2048

单项选择题For the network 192.0.2.0 23, which option is a valid IP address that can be assigned to a host?（）

A. 192.0.2.0
B. 192.0.2.255
C. 192.0.3.255
D. 192.0.4.0

单项选择题The ip subnet zero command is not configured on a router. What would be the IP address of Ethernet0 0 using the first available address from the sixth subnet of the network 192.168.8.0 29?（）

A. 192.168.8.25
B. 192.168.8.41
C. 192.168.8.49
D. 192.168.8.113

单项选择题What speeds must be disabled in a mixed 802.11b g WLAN to allow only 802.11g clients to connect?（）

A. 6, 9, 12, 18
B. 1, 2, 5.5, 6
C. 5.5, 6, 9, 11
D. 1, 2, 5.5, 11

单项选择题Which port state is introduced by Rapid-PVST?（）

A. learning
B. listening
C. discarding
D. forwarding