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N10-009 · Question #288

In an environment with one router, which of the following will allow a network engineer to communicate between VLANs without purchasing additional hardware?

The correct answer is A. Subinterfaces. A subinterface is a logical interface created on a single physical router interface that allows routing between VLANs (known as Router-on-a-Stick (ROAS)). This method is commonly used when only one physical router is available, allowing inter-VLAN communication without additional

Submitted by layla.eg· Mar 6, 2026Network Implementation

Question

In an environment with one router, which of the following will allow a network engineer to communicate between VLANs without purchasing additional hardware?

Options

  • ASubinterfaces
  • BVXLAN
  • CLayer 3 switch
  • DVIR

How the community answered

(37 responses)
  • A
    92% (34)
  • B
    5% (2)
  • C
    3% (1)

Explanation

A subinterface is a logical interface created on a single physical router interface that allows routing between VLANs (known as Router-on-a-Stick (ROAS)). This method is commonly used when only one physical router is available, allowing inter-VLAN communication without additional

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