CWT Troubleshooting & Maintenance Procedures 4

Question 1

A Wi-Fi 6 (802.11ax) AP is installed in a warehouse, but clients only connect at 802.11n rates. What is the most likely reason?

Accepted Answer

The client devices do not support 802.11ax

Answer

Clients can only negotiate the highest rate mutually supported; if client NICs are 802.11n-only, they will connect at 802.11n rates regardless of AP capability.

Question 2

You observe that clients near AP boundaries are 'sticky' and do not roam to a closer AP. What feature can help resolve this?

Accepted Answer

802.11r fast BSS transition or BSS transition management (802.11v)

Answer

BSS Transition Management (802.11v) allows the AP to suggest better APs to clients, encouraging roaming away from a distant AP.

Question 3

During preventive maintenance, a technician inspects AP mounting locations. Which condition requires immediate attention?

Accepted Answer

The AP enclosure shows signs of water ingress or corrosion

Answer

Water ingress or corrosion can cause hardware failure, electrical hazards, and void warranties, requiring immediate remediation.

Question 4

What is the effect of setting the minimum basic rate too low (e.g., 1 Mbps) on a busy WLAN?

Accepted Answer

Legacy clients consume more airtime, reducing performance for all users

Answer

Lower minimum basic rates allow legacy clients to stay connected at slow rates, consuming excessive airtime and degrading the entire cell's capacity.

Question 5

A technician uses a Wi-Fi analyzer and sees dozens of SSIDs on channel 6 in the 2.4 GHz band. The recommended action is:

Accepted Answer

Move the APs to non-overlapping channels 1 or 11 to reduce co-channel interference

Answer

Moving to channels 1 or 11 reduces co-channel interference when channel 6 is saturated with neighboring networks.

(CWT) Certified Wireless Technician Practice Test

(CWT) Certified Wireless Technician Practice Test

CWT Troubleshooting & Maintenance Procedures 4