CWS Wi-Fi Service Sets Flashcards

A single AP supports multiple SSIDs simultaneously. What is each additional SSID typically mapped to?

Answer: A separate VLAN on the wired network

Each SSID on a multi-SSID AP is typically mapped to a unique VLAN on the wired (DS) side to logically separate traffic.

What happens to beacon frames when an administrator enables 'hidden SSID' (SSID suppression)?

Answer: Beacons are sent but the SSID field contains a null or empty value

With hidden SSID enabled, the AP still sends beacons but the SSID element is set to zero-length (null), hiding the network name.

In a mesh Wi-Fi deployment, what type of service set is formed between the mesh nodes themselves?

Answer: MBSS

An MBSS (Mesh Basic Service Set) is the IEEE 802.11s service set formed among mesh nodes (MPs) for multi-hop wireless backhaul.

Which frame type does a client use to actively discover SSIDs by broadcasting a request?

Answer: Probe request

A probe request is sent by a client to actively scan for available SSIDs; APs respond with probe responses.

An ESS is defined by multiple BSSes connected through which element?

Answer: The Distribution System (DS)

The Distribution System (DS) interconnects the BSSes, and the shared SSID ties them together into an ESS.

What is the maximum number of SSIDs most enterprise APs support per radio, as a practical standard?

Answer: 16

Most enterprise-grade APs support up to 16 SSIDs per radio, though using many simultaneously degrades airtime efficiency.

A client is associated to an AP in infrastructure mode. Which service set type describes this relationship?

Answer: BSS

A single AP and its associated clients form a BSS (Basic Service Set) operating in infrastructure mode.