CWS Wi-Fi Service Sets Flashcards

What identifier uniquely distinguishes one BSS from another at Layer 2?

Answer: BSSID

The BSSID is a 48-bit MAC address that uniquely identifies a single BSS at Layer 2.

In an IBSS (ad-hoc) network, which device generates the BSSID?

Answer: The first station that starts the IBSS

In an IBSS, the first station that beacons and establishes the network generates a locally administered BSSID.

Which statement correctly describes a Distribution System (DS) in a Wi-Fi ESS?

Answer: It is the wired or logical backbone interconnecting APs

The Distribution System (DS) is the wired or logical infrastructure (typically Ethernet) that connects multiple APs to form an ESS.

A roaming client moves from AP1 to AP2, both sharing the same SSID. What remains constant during this transition?

Answer: SSID

The SSID (network name) stays the same across all APs in an ESS, enabling seamless roaming without reconfiguration.

How many BSSes can share the same SSID to form an ESS?

Answer: No fixed limit—two or more

An ESS can consist of two or more BSSes (with no fixed upper limit) that share the same SSID and are connected through a DS.

What term describes the physical coverage area provided by a single AP's radio?

Answer: BSA

The Basic Service Area (BSA) is the geographic RF coverage zone of a single AP or BSS.

Which service set type is most appropriate for a temporary peer-to-peer file transfer between two laptops with no infrastructure available?

Answer: IBSS

An IBSS (Independent Basic Service Set), also called ad-hoc mode, allows direct peer-to-peer communication without an AP.