CWT Troubleshooting & Maintenance Procedures 5

Question 1

A client's Wi-Fi connection drops every 60 minutes at exactly the same interval. What is the most likely cause?

Accepted Answer

DHCP lease expiration and renewal failure

Answer

Exactly timed disconnections at a fixed interval strongly suggest a DHCP lease expiration issue where the renewal is failing.

Question 2

When performing a post-change validation after an AP firmware upgrade, which test is most critical?

Accepted Answer

Confirm clients can associate, authenticate, and pass traffic successfully

Answer

Post-change validation must confirm the full client lifecycle—association, authentication, and data traffic—to ensure the upgrade did not break WLAN functionality.

Question 3

A wireless network experiences a sudden increase in beacon frames observed on a spectrum analyzer. This most likely indicates:

Accepted Answer

A new AP or rouge device has come online broadcasting multiple SSIDs

Answer

A surge in beacon frames typically means a new transmitter—possibly a rogue AP broadcasting multiple SSIDs—has appeared in the RF environment.

Question 4

During troubleshooting, you find an AP's 'retry rate' counter is above 20%. This metric indicates:

Accepted Answer

Frame retransmissions are excessive, pointing to poor RF or interference

Answer

A retry rate above 10-20% indicates the AP is frequently retransmitting frames because clients are not acknowledging them, which degrades throughput.

Question 5

A newly deployed outdoor AP operating on a DFS channel goes offline every afternoon. The most likely explanation is:

Accepted Answer

Radar pulses from nearby aviation or weather radar triggering a DFS event

Answer

DFS channels require APs to vacate the channel upon radar detection, and recurring afternoon events align with radar patterns such as airport approach or weather radar scanning.

(CWT) Certified Wireless Technician Practice Test

(CWT) Certified Wireless Technician Practice Test

CWT Troubleshooting & Maintenance Procedures 5