CWS Wireless Technologies & Network Fundamentals 3

Question 1

What is the maximum transmit power allowed for 5 GHz UNII-3 band operation in the United States under FCC rules?

Accepted Answer

30 dBm

Answer

The FCC allows up to 30 dBm (1 watt) EIRP for client devices in the UNII-3 (5.725–5.850 GHz) band.

Question 2

Which wireless topology allows devices to communicate directly with each other without an access point?

Accepted Answer

Independent BSS (IBSS)

Answer

An IBSS (Independent Basic Service Set), also called ad hoc mode, lets devices communicate peer-to-peer without an AP.

Question 3

What does RSSI measure in a wireless network?

Accepted Answer

The relative received signal strength from an AP

Answer

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

Question 4

Which 802.11 feature allows an AP to dynamically switch channels to avoid radar interference in the 5 GHz band?

Accepted Answer

DFS (Dynamic Frequency Selection)

Answer

DFS enables APs to detect radar systems and automatically move to a different channel to avoid interference, as required by FCC/ETSI regulations.

Question 5

A network uses 20 MHz channels in the 2.4 GHz band. How many non-overlapping channels are available in the US?

Accepted Answer

3

Answer

In the US 2.4 GHz band, only channels 1, 6, and 11 are non-overlapping when using 20 MHz channel widths.

(CWS) Certified Wireless Specialist Practice Test