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N10-009 · Question #71

N10-009 Question #71: Real Exam Question with Answer & Explanation

The correct answer is A: A router with only one available LAN port. Introduction to Subinterfaces: Subinterfaces are logical interfaces created on a single physical interface. They are used to enable a router to support multiple networks on a single physical interface. Use Case for Subinterfaces: Subinterfaces are commonly used in scenarios where

Submitted by tunde_lagos· Mar 6, 2026Network implementation

Question

Which of the following most likely requires the use of subinterfaces?

Options

  • AA router with only one available LAN port
  • BA firewall performing deep packet inspection
  • CA hub utilizing jumbo frames
  • DA switch using Spanning Tree Protocol

Explanation

Introduction to Subinterfaces: Subinterfaces are logical interfaces created on a single physical interface. They are used to enable a router to support multiple networks on a single physical interface. Use Case for Subinterfaces: Subinterfaces are commonly used in scenarios where VLANs are implemented. A router with a single physical LAN port can be configured with multiple subinterfaces, each associated with a

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