In inter-VLAN routing, what does the router use to communicate between different VLANs?

In inter-VLAN routing, what does the router use to communicate between different VLANs?

• A. Access Ports
• B. Trunk Ports
• C. Router Interfaces
• D. Bridge Protocol Data Units

Answer: (C)

In inter-VLAN routing, the router uses router interfaces to communicate between different VLANs. Each VLAN is a separate broadcast domain, which means that devices in one VLAN cannot directly communicate with devices in another VLAN without the routing capability provided by a router or a Layer 3 device. Router interfaces that are configured as "subinterfaces" are typically used for this purpose. Each subinterface corresponds to a VLAN and has its own IP address that is part of that VLAN's subnet. When a device in one VLAN needs to communicate with a device in another VLAN, the data packets are sent to the router's interface associated with the source VLAN. The router then looks up the destination VLAN, routes the traffic accordingly, and forwards it to the correct VLAN interface. While the configuration of trunk ports allows for multiple VLANs to be carried over a single physical link between devices, it's the router interfaces (or subinterfaces) that handle the actual routing of packets between the VLANs. Access ports, on the other hand, are associated with a single VLAN and do not have the capability to facilitate routing between VLANs. Bridge Protocol Data Units (BPDUs) are related to the Spanning Tree Protocol and are used in switch management for avoiding loops but do not pert

In inter-VLAN routing, the router uses router interfaces to communicate between different VLANs. Each VLAN is a separate broadcast domain, which means that devices in one VLAN cannot directly communicate with devices in another VLAN without the routing capability provided by a router or a Layer 3 device.

Router interfaces that are configured as "subinterfaces" are typically used for this purpose. Each subinterface corresponds to a VLAN and has its own IP address that is part of that VLAN's subnet. When a device in one VLAN needs to communicate with a device in another VLAN, the data packets are sent to the router's interface associated with the source VLAN. The router then looks up the destination VLAN, routes the traffic accordingly, and forwards it to the correct VLAN interface.

While the configuration of trunk ports allows for multiple VLANs to be carried over a single physical link between devices, it's the router interfaces (or subinterfaces) that handle the actual routing of packets between the VLANs. Access ports, on the other hand, are associated with a single VLAN and do not have the capability to facilitate routing between VLANs. Bridge Protocol Data Units (BPDUs) are related to the Spanning Tree Protocol and are used in switch management for avoiding loops but do not pert