Which port type is typically used to connect switches together or connect a switch to a router to carry multiple VLANs?

Which port type is typically used to connect switches together or connect a switch to a router to carry multiple VLANs?

• A. Access Port
• B. Trunk Port
• C. Edge Port
• D. Uplink Port

Answer: (B)

To carry traffic for multiple VLANs over a single link between devices, you use a trunk. A trunk port tags frames with their VLAN ID (802.1Q), allowing one physical connection to carry traffic from several VLANs at once. This is exactly what you need when linking switches so VLANs can span across the network, or when connecting a switch to a router so the router can handle multiple VLANs (often done with router-on-a-stick, where the router uses subinterfaces for each VLAN). An access port, by contrast, carries only a single VLAN and is meant for end devices, not for inter-switch or switch-to-router connections that must carry multiple VLANs. The term uplink is less precise and can be used in different contexts, but the essential capability to carry multiple VLANs on a single link is provided by a trunk port.

To carry traffic for multiple VLANs over a single link between devices, you use a trunk. A trunk port tags frames with their VLAN ID (802.1Q), allowing one physical connection to carry traffic from several VLANs at once. This is exactly what you need when linking switches so VLANs can span across the network, or when connecting a switch to a router so the router can handle multiple VLANs (often done with router-on-a-stick, where the router uses subinterfaces for each VLAN). An access port, by contrast, carries only a single VLAN and is meant for end devices, not for inter-switch or switch-to-router connections that must carry multiple VLANs. The term uplink is less precise and can be used in different contexts, but the essential capability to carry multiple VLANs on a single link is provided by a trunk port.