Which line assigns an IP address to the VLAN 30 interface in the sample?

Which line assigns an IP address to the VLAN 30 interface in the sample?

• A. ip address 10.10.30.1/24
• B. interface vlan 30
• C. vlan 30
• D. ip address 10.10.40.1/24

Answer: (A)

Assigning an IP address to a VLAN interface (the SVI) is what provides a gateway for hosts in that VLAN and enables inter-VLAN routing. The line ip address 10.10.30.1/24 is the command that actually sets that gateway on VLAN 30’s interface. Merely entering the VLAN interface with interface vlan 30 or creating the VLAN with vlan 30 prepares the interface or the VLAN, but does not assign an IP address. Using a different address like 10.10.40.1/24 would place the gateway in a different subnet, which wouldn’t serve VLAN 30’s 10.10.30.0/24 network.

Assigning an IP address to a VLAN interface (the SVI) is what provides a gateway for hosts in that VLAN and enables inter-VLAN routing. The line ip address 10.10.30.1/24 is the command that actually sets that gateway on VLAN 30’s interface. Merely entering the VLAN interface with interface vlan 30 or creating the VLAN with vlan 30 prepares the interface or the VLAN, but does not assign an IP address. Using a different address like 10.10.40.1/24 would place the gateway in a different subnet, which wouldn’t serve VLAN 30’s 10.10.30.0/24 network.