Refer to the exhibit. Three VLANs have been configured with each switch. All the interfaces have been configured properly and the IP routing is operational. Router R1 is to be used as a Router-on-a-Stick to provide inter-VLAN communication, what is true about its present configuration? ENCAPSULATION DOT1Q NEEDS CONFIGURED NO EXHIBIT

The command encapsulation dot1q [vlan#] needs to be configured for each subinterface.

The command no shutdown needs to be issued under each subinterface

The command router OSPF 1 followed by network 192.168.1.0 0.0.0.255 needs to be configured on the Router.

No further configuration is required.

Explanation

For the first subinterface, go back and use command 'encapsulation dot1q 2" , and repeat for the rest of the subinterfaces with the correct vlan-numbers. /// Router on a stick is one of the methods used to allow inter-VLAN communication. To allow inter-VLAN routing communication, a router or a layer 3 switch must be used. To support 802.1Q or ISL encapsulation method for routing on a Fast Ethernet interface the encapsulation must be agreed on both sides. The routers interface is divided into subinterfaces (logical interfaces) for each VLAN, in this case three subinterfaces were used, one for each VLAN. The router will know each network and add it into its routing table, however if the encapsulation method is not configured for each VLAN the router will not know that the link is a trunk. For more information refer to: [http://www.orbit-computer-solutions.com/How-to-Configure-Router-on-a-Stick-InterVLAN-Routing.php]