CWS CWS WLAN Troubleshooting 2

Question 1

Which tool captures 802.11 frames for detailed protocol-level analysis?

Accepted Answer

Wireless protocol analyzer (packet sniffer)

Answer

A wireless protocol analyzer captures 802.11 frames at the MAC layer for detailed analysis of association, authentication, and data exchange sequences.

Question 2

A wireless client can associate with the AP but cannot reach any internet resources. Pinging the default gateway succeeds. What is the most likely cause?

Accepted Answer

DNS resolution failure

Answer

If the default gateway is reachable but internet resources are not, DNS failure is most likely since domain names cannot be resolved to IP addresses.

Question 3

What does RSSI measure in a wireless network?

Accepted Answer

The relative power level of the received RF signal at the receiver

Answer

RSSI (Received Signal Strength Indicator) is a measurement of the power level of the received RF signal, typically expressed as a negative value in dBm.

Question 4

When multiple APs in the same area are configured to use the same 802.11 channel, what problem results?

Accepted Answer

Co-channel interference (CCI) and increased contention

Answer

Co-channel interference (CCI) forces all devices sharing the same channel to contend for the medium, reducing throughput and increasing latency.

Question 5

A wireless user reports slow speeds only in a specific conference room while other areas work fine. What is the most likely cause?

Accepted Answer

RF interference or poor signal coverage in that area

Answer

Location-specific performance issues typically point to RF factors such as signal attenuation, multipath, or localized interference in that particular area.

CWS Exam Practice Test

CWS Exam Practice Test

CWS CWS WLAN Troubleshooting 2