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?

  • A multilayer switch is needed.
  • A router with at least two LAN interfaces is needed.
  • Two groups of switches are needed, each with ports that are configured for one VLAN.
  • A switch with a port that is configured as a trunk is needed when connecting to the router.
    Answers Explanation & Hints:

    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.

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CCNA 2 v7 – SRWE v7.02 – Modules 1 – 4 – Switching Concepts, VLANs, and Inter-VLAN Routing Exam Answers Full 100%