CWT Wireless Standards & Radio Frequency Fundamentals 4

Question 1

The 6 GHz band introduced with Wi-Fi 6E provides approximately how much additional spectrum in the US?

Accepted Answer

1.2 GHz

Answer

The FCC opened 1,200 MHz of spectrum in the 6 GHz band (5.925–7.125 GHz) for unlicensed Wi-Fi 6E use in the United States.

Question 2

What does RSSI measure in a Wi-Fi network?

Accepted Answer

The relative received signal strength at a wireless device

Answer

RSSI (Received Signal Strength Indicator) is a relative measure of the power level of a received radio signal, typically expressed as a negative dBm value.

Question 3

Which technology allows a single AP to serve multiple clients simultaneously by directing beams to individual users?

Accepted Answer

MU-MIMO

Answer

Multi-User MIMO (MU-MIMO) enables an AP to use multiple antennas to transmit to several clients at the same time, increasing overall throughput.

Question 4

What is the primary advantage of using a directional antenna over an omnidirectional antenna in a point-to-point wireless link?

Accepted Answer

Increased gain and focused signal toward the remote end

Answer

Directional antennas concentrate RF energy in a specific direction, providing higher gain and longer link distances compared to omnidirectional antennas.

Question 5

What is the Friis transmission equation used to calculate?

Accepted Answer

The received signal power given transmit power, antenna gains, and distance

Answer

The Friis transmission equation calculates the power received by an antenna given the transmitted power, antenna gains, wavelength, and separation distance.

(CWT) Certified Wireless Technician Practice Test

(CWT) Certified Wireless Technician Practice Test

CWT Wireless Standards & Radio Frequency Fundamentals 4