What is required to enable communication between these two VLANs while using the router-on-a-stick approach?

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#1

A high school uses VLAN15 for the laboratory network and VLAN30 for the faculty network. What is required to enable communication between these two VLANs while using the router-on-a-stick approach?

  1. A multilayer switch is needed.
  2. A router with at least two LAN interfaces is needed.
  3. Two groups of switches are needed, each with ports that are configured for one VLAN.
  4. A switch with a port that is configured as a trunk is needed when connecting to the router.*

Explanation: With router-on-a-stick, inter-VLAN routing is performed by a router with a single router interface that is connected to a switch port configured with trunk mode. Multiple subinterfaces, each configured for a VLAN, can be configured under the single physical router interface. Switches can have ports that are assigned to different VLANs, but communication between those VLANs requires routing function from the router. A multilayer switch is not used in a router-on-a-stick approach to inter-VLAN routing.