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Question

Difficulty: MediumPhysical Security Controls

A network technician discovers an rogue wireless router plugged into an active Ethernet wall jack in an unmonitored building lobby. To prevent visitors from physically attaching unauthorized devices to open network jacks in public areas without requiring major switch reconfiguration, which of the following physical security controls should be implemented?

  1. Physical RJ45 port locksAnswer
  2. B
    Kensington cable locks
  3. C
    Privacy screen filters
  4. D
    Biometric door locks

Answer

Physical RJ45 port locks
Physical RJ45 port locks fit inside unused network ports and require a special tool/key to remove. They provide a direct physical barrier preventing unauthorized hardware from connecting to active wall jacks in open or public spaces.

Step-by-Step Solution

1
Identify the primary threat vector
Unauthorized physical insertion of network hardware into open RJ45 wall outlets in a public area.
Publicly accessible Ethernet jacks present an open physical attack surface for rogue network access.
2
Evaluate physical security controls designed for open interfaces
RJ45 port locks physically cap and block unused Ethernet ports, requiring a physical key to remove.
This directly prevents unauthorized cable connections at the jack level without altering room permissions or tethering equipment.

Key Concept

Physical interface hardening via RJ45 port locks
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Topics

Physical Security Controls

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