在Cisco Catalyst 3548以太网交换机上建立一个名为lib105的VLAN，下列正确的配置是______。A) Swit

A．Switch-3548 (config-if) #switchport trunk encapsulation dot 1 q Switch-3548 (config-if) #switchport trunk allowed vlan 1,10,20,30

B．Switch-3548 (config-if) #switchport mode trunk Switch-3548 (config-if) #switchport trunk encapsulation isl Switch-3548 (config-if) #switchport trunk allowed vlan 1-30

C．Switch-3548 (config-if) #switchport mode trunk Switch-3548 (config-if) #switchport trunk encapsulation negotiate Switch-3548 (config-if) #switchport trunk allowed vlan 1-30

D．Switch-3548 (config-if) #switchport mode trunk Switch-3548 (config-if) #switchport trunk encapsulation dot 1q Switch-3548 (config-if) #switchport trunk allowed vlan 1,10,20,30

加快Catalyst 3548发生直接链路失效时的收敛速度，正确配置生成树可选功能的命令是

A．spanning-tree backbonefast

B．spanning-tree portfast default

C．spanning-tree uplinkfast max-update-rate 32000

D．set spantree uplinkfast enable rate 40

加快Catalyst 3548发生直接链路失效时的收敛速度，正确配置生成树可选功能的命令是()。

A) spanning-tree backbonefast

B) spanning-tree porfast default

C) spanning-tree uplinkfast max-update-rate 32000

D) set span tree uplindfast enable rate 40

A、Show interface

B、Show cdp neighbors

C、Show running-config

D、Show mac-table

A.Duplex half

B.Duplex full

C.Speed 10

D.Speed100

A、Switch#enable

B、Switch#config terminal

C、Switch(config)#interface fastethernet 0/1

D、Switch#line console 0

A、cisco

B、ciscolab

C、enable

D、secret

A.show run？

B.show startup-config

C.show running-config

D.show run

E.show start

A．ISL和set 3/1 trunk on isl

B．ISL和set trunk 3/1 on isl

C．IEEE 802.1Q和set tramk 3/1 on dotlq

D．IEEE 802.1Q和set 3/1 trunk on dotlq