CompTIA Security+ Question K-4

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

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

Answer: A,E

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-to­multi-point antenna over longer distances.