Which of the following statement are correct about the classification of the antenna?
(Multiple choice)

Which of the following protocol is set by IEEE 802.11 standard? (Multiple choice)

Various pipes, metal keel and aluminum pinch in the ceilings will bring a greater impact on the actual effects of signal coverage.

Point-to-point wireless bridge can be used to connect two separate network located in different sites, in wireless backhaul connection, Root AP and Leaf AP should set different channels.

In the 802.11 frame, what is the value used to record the network allocation vector (NAV)?