Which type of inter-VLAN communication design requires the configuration of multiple subinterfaces?

Question:
Which type of inter-VLAN communication design requires the configuration of multiple subinterfaces?

• router on a stick
• routing via a multilayer switch
• routing for the management VLAN
• legacy inter-VLAN routing

Explanation: The router-on-a-stick design always includes subinterfaces on a router. When a multilayer switch is used, multiple SVIs are created. When the number of VLANs equals the number of ports on a router, or when the management VLAN needs to be routed, any of the inter-VLAN design methods can be used.

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