CWT Security Protocols & Network Optimization 5

Question 1

What is the primary security risk associated with using open (unauthenticated) Wi-Fi networks?

Accepted Answer

Eavesdropping due to unencrypted over-the-air transmissions

Answer

Open networks transmit data without encryption, allowing any nearby device in promiscuous mode to capture and read the traffic.

Question 2

Which 802.11ax (Wi-Fi 6) feature reduces power consumption for IoT devices by scheduling when they wake to receive data?

Accepted Answer

TWT (Target Wake Time)

Answer

TWT allows an AP and client to negotiate specific times for the client to wake and exchange data, significantly extending battery life.

Question 3

BSS Coloring in 802.11ax is designed to improve which aspect of WLAN performance?

Accepted Answer

Spatial reuse by allowing concurrent transmissions in overlapping BSSs

Answer

BSS Coloring tags frames with a color identifier so stations can differentiate overlapping BSS transmissions and defer only when necessary, improving spatial reuse.

Question 4

A wireless technician discovers that a client is sending 802.11 probe requests with randomized MAC addresses. What is the security purpose of this client behavior?

Accepted Answer

To prevent tracking of the device's physical location across Wi-Fi networks

Answer

MAC address randomization during scanning prevents third parties from correlating probe requests to a specific device over time.

Question 5

In a high-density WLAN deployment such as a stadium, which channel width is recommended for 5 GHz to maximize the number of available non-overlapping channels?

Accepted Answer

20 MHz

Answer

20 MHz channels maximize the number of non-overlapping channels available in the 5 GHz band, reducing co-channel interference in dense environments.

(CWT) Certified Wireless Technician Practice Test

(CWT) Certified Wireless Technician Practice Test

CWT Security Protocols & Network Optimization 5