单项选择题
A. SW1（config）# vlan 10SW1（config-vlan）# no shut
B. SW1（config）# interface fastethernet 0/1SW1（config-if）# switchport mode accessSW1（config-if）# switchport access vlan 10
C. SW1（config）# interface fastethernet 0/1SW1（config-if）# switchport mode access
D. SW1（config）# vlan 10SW1（config-vlan）# state active
E. SW1（config）# interface fastethernet 0/1SW1（config-if）# no shut
单项选择题 Refer to the exhibit. Switch S2 contains the default configuration. Switches S1 and S3 both have had the command spanning-tree mode rapid-pvst issued on them. What will be the result？（）
单项选择题 The network administrator maps VLAN 10 through 20 to MST instance 2. How will this information be propagated to all appropriate switches？（）
单项选择题 Refer to the show spanning-tree mst configuration output shown in the exhibit. What should be changed in the configuration of the switch SW_2 in order for it to participate in the same MST region？ （）
