Using a Single Channel Architecture (SCA) means that all APs will be using the same channel in a given layer. How is the AP with which the client associates determined?
A.
All APs share a virtual Multicast Address. A controller will tell the closest AP to the client to communicate with it, since it has a greater RSSI from the client.
B.
All APs share a virtual BSSID. A controller will tell the closest AP to the client to communicate with it, since it has a greater RSSI from the client.
C.
All APs share a virtual IP address. A controller will tell the closest AP to the client to communicate with it, since it has a greater RSSI from the client.
D.
The client selects the AP based on a known set of MAC to BSSID mappings stored in the client's authorized SSID listing.
In a Single Channel Architecture (SCA), all APs operate on the same channel and present a single virtual BSSID to clients. The WLAN controller manages client associations by directing the most appropriate AP to handle communication with the client, typically based on the strongest Received Signal Strength Indicator (RSSI).
This architecture simplifies client roaming and reduces co-channel interference, as the controller orchestrates AP transmissions to prevent collisions.
[Reference:CWDP-305 Study Guide, Chapter on Infrastructure Design – Single Channel Architecture., , ]
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