Which line assigns the IP address to VLAN 30's SVI in the sample?

Which line assigns the IP address to VLAN 30's SVI in the sample?

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

Answer: (B)

Assigning an IP to the VLAN’s SVI is done by configuring the ip address on the SVI interface. The line that sets the address 10.10.30.1/24 actually binds that IP to VLAN 30’s virtual interface, making 10.10.30.1 the gateway for devices in that VLAN and the management address for the switch in that VLAN. The command interface vlan 30 merely selects or creates the SVI to configure; it does not assign an IP by itself. The command vlan 30 is used to create or reference the VLAN in the VLAN database, not to set an IP on the SVI. The alternative ip address 10.10.40.1/24 would place a different IP on the SVI (or another interface) and would not match the sample’s intended VLAN 30 gateway, so it wouldn’t be the correct assignment for VLAN 30’s SVI.

Assigning an IP to the VLAN’s SVI is done by configuring the ip address on the SVI interface. The line that sets the address 10.10.30.1/24 actually binds that IP to VLAN 30’s virtual interface, making 10.10.30.1 the gateway for devices in that VLAN and the management address for the switch in that VLAN. The command interface vlan 30 merely selects or creates the SVI to configure; it does not assign an IP by itself. The command vlan 30 is used to create or reference the VLAN in the VLAN database, not to set an IP on the SVI. The alternative ip address 10.10.40.1/24 would place a different IP on the SVI (or another interface) and would not match the sample’s intended VLAN 30 gateway, so it wouldn’t be the correct assignment for VLAN 30’s SVI.