Refer to the topology and configuration information shown in the graphic. The router has been
configured to provide communication between the VLANs. Which IOS commands are required to
configure switch port fa0/1 to establish a link with router R1 using the IEEE standard protocol?
(Choose three.)

A.
Switch(config-if)# switchport mode access

B.
Switch(config-if)# switchport mode trunk

C.
Switch(config-if)# switchport access vlan 1

D.
Switch(config-if)# switchport trunk encapsulation dot1q

E.
Switch(config)# interface fastethernet 0/1

F.
Switch(config-if)# switchport trunk encapsulation isl

Explanation:
Before you can begin, you have to get into the interface. Answer choice A is the only command in
the selection that puts the IOS into interface mode. Once in the interface you have to set it to trunk
mode, so choice C is correct. The switch port needs encapsulation. Answer choice E give you the
choice of ISL and choice F gives you dot1q. Since the diagram suggests that the router is using
802.1Q, you must also use dot1q.