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GPEN · Question #443
GPEN Question #443: Real Exam Question with Answer & Explanation
The correct answer is B. High gain and Directional. A high-gain directional antenna provides focused, long-range signal coverage that is ideal for stationary multi-day monitoring of a specific zone in a large facility.
Question
You are performing a wireless penetration lest and are currently looking for rogue access points in one of their large facilities. You need to select an antenna that you can setup in a building and monitor the area for several days to see if any access points are turned on during the duration of the test. What type of antenna will you be selecting for this task?
Options
- AHigh gain and Omni-Directional
- BHigh gain and Directional
- CLow gain and Omni-Directional
- DLow gain and Directional
Explanation
A high-gain directional antenna provides focused, long-range signal coverage that is ideal for stationary multi-day monitoring of a specific zone in a large facility.
Common mistakes.
- A. An omni-directional antenna radiates and receives equally in all directions, collecting more extraneous noise and covering a less focused area, which is suboptimal for long-term stationary monitoring of a specific zone.
- C. Low gain combined with omni-directional provides the worst performance for a large facility, lacking both the range needed to cover distance and the focus needed to reduce interference.
- D. Low gain limits detection range significantly in a large building; a low-gain directional antenna suits short-range point-to-point links, not extended surveillance of a wide area.
Concept tested. Wireless antenna selection for passive rogue AP detection
Reference. https://csrc.nist.gov/publications/detail/sp/800-97/final
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