VDV Wireless Technology 2

Question 1

What is the maximum data rate of 802.11ac (Wi-Fi 5) in the 80 MHz channel configuration?

Accepted Answer

433 Mbps

Answer

802.11ac with a single spatial stream in 80 MHz channel width achieves up to 433 Mbps.

Question 2

Which wireless frequency band is most susceptible to interference from microwave ovens?

Accepted Answer

2.4 GHz

Answer

Microwave ovens operate near 2.45 GHz and can significantly interfere with 2.4 GHz Wi-Fi networks.

Question 3

In a MIMO antenna system, what does the term 'spatial multiplexing' refer to?

Accepted Answer

Transmitting multiple data streams simultaneously over the same channel

Answer

Spatial multiplexing uses multiple antennas to send independent data streams simultaneously, increasing throughput.

Question 4

What is the purpose of a wireless site survey before installing an enterprise Wi-Fi network?

Accepted Answer

To identify RF coverage, interference sources, and optimal AP placement

Answer

A site survey maps RF signal strength, detects interference, and determines optimal access point locations for full coverage.

Question 5

Which Wi-Fi security protocol uses a 4-way handshake to establish encryption keys?

Accepted Answer

WPA/WPA2

Answer

WPA and WPA2 use a 4-way handshake between the client and access point to derive and confirm the Pairwise Transient Key (PTK).

(VDV) Voice Data Video Technician Certified Practice Test