CWS CWS Wireless Client Devices 2

Question 1

Which Wi-Fi client power-saving mechanism allows an access point to buffer frames for a sleeping client and deliver them upon request?

Accepted Answer

Legacy Power Save (PS-Poll)

Answer

Legacy Power Save uses PS-Poll frames to request buffered unicast data from the AP after waking.

Question 2

A wireless client associates but cannot obtain an IP address. The most likely Layer 2 issue to investigate first is:

Accepted Answer

4-Way Handshake failure

Answer

A failed 4-Way Handshake prevents successful association completion, blocking all traffic including DHCP.

Question 3

What is the primary purpose of the 802.11 Probe Request frame sent by a wireless client?

Accepted Answer

To actively discover available BSSs

Answer

Probe Requests are sent by clients to actively scan for SSIDs and gather AP capability information.

Question 4

Which client device setting controls how aggressively the client roams away from an AP with a degrading signal?

Accepted Answer

Roaming aggressiveness / sensitivity

Answer

Roaming aggressiveness (or sensitivity) determines the RSSI threshold at which a client will scan and reassociate to a better AP.

Question 5

A dual-band 802.11ac client is connected to a 2.4 GHz radio. What feature could the AP use to encourage the client to use the 5 GHz band?

Accepted Answer

Band steering

Answer

Band steering techniques (e.g., delaying Probe Responses on 2.4 GHz) encourage capable clients to associate on 5 GHz.

CWS Exam Practice Test