In a router-on-a-stick configuration, what should be configured on the switch port that connects to the router?

In a router-on-a-stick configuration, what should be configured on the switch port that connects to the router?

• A. Set the port to access mode
• B. Configure the port as a trunk port
• C. Enable port security on the port
• D. Disable spanning tree on the port

Answer: (B)

In a router-on-a-stick configuration, the switch port that connects to the router must be configured as a trunk port. This is essential because a trunk port is designed to carry traffic from multiple VLANs simultaneously, which is necessary for a router-on-a-stick setup. In this configuration, a single physical link is used to connect the router and switch, and that link must be capable of understanding VLAN tags. When VLAN tagging is implemented, the trunk port will allow the transfer of traffic from different VLANs over the same connection. The router can then route between those VLANs, facilitating inter-VLAN communication. The configuration ensures that the switch can differentiate which VLAN the incoming traffic belongs to and appropriately send it to the router for processing. Only in this way can the router efficiently perform routing functions for the various VLANs present on the network.

In a router-on-a-stick configuration, the switch port that connects to the router must be configured as a trunk port. This is essential because a trunk port is designed to carry traffic from multiple VLANs simultaneously, which is necessary for a router-on-a-stick setup.

In this configuration, a single physical link is used to connect the router and switch, and that link must be capable of understanding VLAN tags. When VLAN tagging is implemented, the trunk port will allow the transfer of traffic from different VLANs over the same connection. The router can then route between those VLANs, facilitating inter-VLAN communication.

The configuration ensures that the switch can differentiate which VLAN the incoming traffic belongs to and appropriately send it to the router for processing. Only in this way can the router efficiently perform routing functions for the various VLANs present on the network.