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

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

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

单项选择题What is the name of the VTP mode of operation that enables a switch to forward only VTP advertisements while still permitting the editing of local VLAN information?（）

A. server
B. client
C. tunnel
D. transparent

单项选择题Which command will show the MAC addresses of stations connected to switch ports?（）

A. show mac-address
B. show arp
C. show table
D. show switchport

单项选择题QoS policies are applied on the switches of a LAN. Which type of command will show the effects of the policy in real time?（）

A. show command
B. debug command
C. configuration command
D. rommon command

单项选择题How many subnets can be gained by subnetting 172.17.32.0 23 into a 27 mask, and how many usable host addresses will there be per subnet?（）

A. 8 subnets, 31 hosts
B. 8 subnets, 32 hosts
C. 16 subnets, 30 hosts
D. 16 subnets, 32 hosts
E. A Class B address can't be subnetted into the fourth octet.