CWS CWS Network Performance & Optimization 2

Question 1

What does the term 'airtime fairness' refer to in WLAN management?

Accepted Answer

Allocating equal airtime to each client rather than equal data rate, preventing slow clients from monopolizing the channel

Answer

Airtime fairness allocates equal channel time to each client, preventing older or slower devices from degrading throughput for faster clients.

Question 2

Which metric best indicates whether a wireless channel is congested from competing networks?

Accepted Answer

Channel utilization percentage

Answer

Channel utilization percentage shows how much of the available airtime is being consumed, including by neighboring networks on the same channel.

Question 3

What is MU-MIMO and how does it improve WLAN performance?

Accepted Answer

Multi-User Multiple Input Multiple Output — allows an AP to transmit to multiple clients simultaneously, increasing throughput

Answer

MU-MIMO allows a single AP to communicate with multiple clients at the same time using spatial streams, significantly improving overall network throughput.

Question 4

A network shows high retry rates on 2.4 GHz. What is the most effective optimization step?

Accepted Answer

Identify and mitigate interference sources, and consider migrating clients to 5 GHz

Answer

High retry rates signal poor signal quality or interference; resolving interference and moving clients to 5 GHz reduces retries and improves reliability.

Question 5

What is the purpose of the Transmit Power Control (TPC) feature in enterprise WLANs?

Accepted Answer

To dynamically adjust AP transmit power to optimize coverage and reduce co-channel interference

Answer

TPC dynamically reduces AP transmit power when neighboring APs provide sufficient coverage, minimizing co-channel interference.

(CWS) Certified Wireless Specialist Practice Test

(CWS) Certified Wireless Specialist Practice Test

CWS CWS Network Performance & Optimization 2