CWS CWS Wi-Fi Service Sets 4

Question 1

Which of the following best describes an ESSID?

Accepted Answer

The common SSID name shared across all BSSes in an ESS

Answer

An ESSID (Extended Service Set Identifier) is simply the human-readable SSID name shared by all APs forming the ESS.

Question 2

Why does using many SSIDs on a single AP negatively impact network performance?

Accepted Answer

Each SSID requires periodic beacons that consume airtime

Answer

Each SSID generates its own beacon frames at the beacon interval, consuming shared airtime and reducing capacity for data traffic.

Question 3

In infrastructure BSS mode, all client-to-client frames must pass through which device?

Accepted Answer

The Access Point

Answer

In a BSS, the AP is the central hub; all frames between associated clients must be forwarded through the AP.

Question 4

A wireless network analyst sees two APs broadcasting the same SSID and connected by Ethernet. What type of service set is this?

Accepted Answer

ESS

Answer

Two or more APs sharing the same SSID and connected via a wired DS form an ESS, enabling client roaming.

Question 5

What is the primary security risk of SSID suppression (hidden SSID)?

Accepted Answer

Probe requests expose the SSID in cleartext during active scanning

Answer

Clients that have previously connected must send probe requests containing the SSID in plaintext to reconnect, exposing it to passive capture.

CWS Exam Practice Test