VDV Wireless Technology 3

Question 1

Which 802.11 amendment introduced the 6 GHz band for Wi-Fi use?

Accepted Answer

802.11ax

Answer

802.11ax (Wi-Fi 6E) was the first amendment to include the 6 GHz band, providing additional spectrum with less interference.

Question 2

What is the primary function of a wireless LAN controller (WLC) in an enterprise network?

Accepted Answer

To centrally manage and configure multiple access points

Answer

A WLC centrally manages AP configurations, roaming, security policies, and firmware updates across the enterprise WLAN.

Question 3

In wireless communications, what is 'multipath fading'?

Accepted Answer

Signal degradation caused by multiple reflected copies of a signal arriving at different times

Answer

Multipath fading occurs when reflected RF signals arrive at the receiver slightly delayed, causing destructive interference with the direct signal.

Question 4

What type of antenna pattern is most appropriate for providing coverage in a long hallway?

Accepted Answer

Yagi directional antenna

Answer

A Yagi antenna's narrow, elongated beam pattern is ideal for directing RF energy down a long hallway corridor.

Question 5

Which wireless standard is specifically designed for short-range, high-bandwidth transmission in the 60 GHz band?

Accepted Answer

802.11ad (WiGig)

Answer

802.11ad (WiGig) operates in the 60 GHz mmWave band, offering multi-gigabit speeds over very short distances.

(VDV) Voice Data Video Technician Certified Practice Test