What must be enabled for a switch to properly facilitate inter-VLAN routing?

What must be enabled for a switch to properly facilitate inter-VLAN routing?

• A. Protocol filtering
• B. IP routing
• C. MAC address learning
• D. VLAN access control lists

Answer: (B)

For a switch to properly facilitate inter-VLAN routing, IP routing must be enabled on the switch. This is because inter-VLAN routing involves routing packets between different VLANs, and without IP routing enabled, the switch cannot make routing decisions to forward packets between these VLANs. When IP routing is enabled on a multilayer switch, it allows the switch to operate at Layer 3 of the OSI model, facilitating communication between VLANs. The switch can assign different VLANs their unique IP addresses and decide how to forward packets that need to travel from one VLAN to another. Other options involve functions that do not specifically enable routing between VLANs, such as protocol filtering, which manages what protocols are allowed on a network; MAC address learning, which helps the switch learn the source MAC addresses of incoming frames; and VLAN access control lists, which are used to restrict traffic for security, but do not directly facilitate routing itself. Thus, enabling IP routing is the key requirement for effective inter-VLAN communication.

For a switch to properly facilitate inter-VLAN routing, IP routing must be enabled on the switch. This is because inter-VLAN routing involves routing packets between different VLANs, and without IP routing enabled, the switch cannot make routing decisions to forward packets between these VLANs.

When IP routing is enabled on a multilayer switch, it allows the switch to operate at Layer 3 of the OSI model, facilitating communication between VLANs. The switch can assign different VLANs their unique IP addresses and decide how to forward packets that need to travel from one VLAN to another.

Other options involve functions that do not specifically enable routing between VLANs, such as protocol filtering, which manages what protocols are allowed on a network; MAC address learning, which helps the switch learn the source MAC addresses of incoming frames; and VLAN access control lists, which are used to restrict traffic for security, but do not directly facilitate routing itself. Thus, enabling IP routing is the key requirement for effective inter-VLAN communication.