Which command will you need to enter on the Layer 3 switch to ensure it has Layer 3 capabilities?

Which command will you need to enter on the Layer 3 switch to ensure it has Layer 3 capabilities?

• A. Set switchport to trunk
• B. Enable routing
• C. Enter VLAN configurations
• D. Configure access modes on each port

Answer: (B)

To ensure that a Layer 3 switch has Layer 3 capabilities, the command needed is to enable routing. Layer 3 switches are equipped with features that allow them to perform routing functions between VLANs in addition to their switching capabilities. This is essential for inter-VLAN communication, as it requires routing to allow data to move from one VLAN to another. Enabling routing on the switch activates its capability to make forwarding decisions based on IP addresses rather than just MAC addresses, which is a fundamental characteristic of Layer 2 switching. This command essentially transitions the switch from functioning purely as a switch to being able to route packets like a router, providing enhanced functionality within the network. The other options relate to Layer 2 functionalities or configurations that do not affect the Layer 3 capabilities directly. For instance, setting trunk modes or configuring access modes pertains to how the switch handles VLAN traffic rather than enabling its routing functionalities. Additionally, entering VLAN configurations is part of setting up virtual LANs but does not turn on the routing capabilities essential for Layer 3 operations.

To ensure that a Layer 3 switch has Layer 3 capabilities, the command needed is to enable routing. Layer 3 switches are equipped with features that allow them to perform routing functions between VLANs in addition to their switching capabilities. This is essential for inter-VLAN communication, as it requires routing to allow data to move from one VLAN to another.

Enabling routing on the switch activates its capability to make forwarding decisions based on IP addresses rather than just MAC addresses, which is a fundamental characteristic of Layer 2 switching. This command essentially transitions the switch from functioning purely as a switch to being able to route packets like a router, providing enhanced functionality within the network.

The other options relate to Layer 2 functionalities or configurations that do not affect the Layer 3 capabilities directly. For instance, setting trunk modes or configuring access modes pertains to how the switch handles VLAN traffic rather than enabling its routing functionalities. Additionally, entering VLAN configurations is part of setting up virtual LANs but does not turn on the routing capabilities essential for Layer 3 operations.