CompTIA Security Plus Mock Test Q184

Which of the following is a directional antenna that can be used in point-to-point or point-to-multi-point WiFi communication systems? (Select TWO).

A. Backfire
B. Dipole
C. Omni
D. PTZ
E. Dish

Correct Answer: A,E
Section: Network Security

Explanation:
Both the Backfire and the Dish antennae are high gain antenna types that transmit a narrow beam of signal. It can therefore be used as a point-to-point antenna over short distances, but as point-to-multi-point antenna over longer distances.

Incorrect Answers:
B: A dipole is an omni-directional antenna that is not suitable for point to point WiFi communication systems.
C: Omni-directional antenna that is not suitable for point to point WiFi communication systems.
D: PTZ antenna found on wireless cameras are dipole antenna, which is not suitable for point to point WiFi communication systems.

References:
http://en.data-alliance.net/how-to-choose-antenna/
https://en.wikipedia.org/wiki/Short_backfire_antenna
https://www.protectiondepot.com/About-Wireless-Security-Cameras_ep_52-1.html