CWS Quality Control & Process Improvement 3

Question 1

Which 802.11 standard feature, when misconfigured, most commonly degrades overall WLAN performance in high-density environments?

Accepted Answer

Legacy data rate support (1 and 2 Mbps)

Answer

Enabling legacy low data rates causes slower clients to occupy airtime longer, degrading throughput for all users in the cell.

Question 2

What is the purpose of a pre-deployment checklist in a wireless installation project?

Accepted Answer

To ensure all materials, configurations, and site conditions are ready before installation begins

Answer

A pre-deployment checklist reduces on-site errors by confirming readiness of equipment, site access, and configuration templates before work begins.

Question 3

During a WLAN QC audit, you discover that several APs are operating on the same channel within range of each other. This condition is called:

Accepted Answer

Co-channel interference (CCI)

Answer

Co-channel interference occurs when multiple APs share the same channel and their coverage cells overlap, causing contention.

Question 4

A root cause analysis (RCA) after a failed wireless deployment should focus on:

Accepted Answer

Identifying systemic process failures to prevent recurrence

Answer

Effective RCA targets process breakdowns and systemic issues rather than individuals to drive lasting improvement.

Question 5

Which KPI best reflects the effectiveness of a wireless network's QoS configuration for voice traffic?

Accepted Answer

Mean Opinion Score (MOS) or jitter levels

Answer

MOS and jitter are the most direct indicators of voice call quality over a wireless network.

(CWS) Certified Wireless Specialist Practice Test