What is the most important fact about the SSID when connecting to a WLAN?

What is the most important fact about the SSID when connecting to a WLAN?

• A. Clients and all access points must be configured with matching SSIDs.
• B. SSIDs must be unique per client device.
• C. SSIDs determine the encryption algorithm used.
• D. SSIDs are optional in a WLAN.

Answer: (A)

In a WLAN, the SSID acts as the network name that both the client and the access points use to identify the same wireless network. For a device to connect—and for it to roam smoothly between access points—the SSID configured on the client must match the SSIDs broadcast by all the APs that belong to that network. If the names don’t match, the client won’t join the intended network, so there’s no connectivity or seamless roaming.

The SSID is not a unique identifier for each client, since many devices can connect to the same network name. It also doesn’t determine the encryption used; encryption is set by the security protocol in use (like WPA2/WPA3) and its options, not by the SSID itself. And while networks can be configured to hide their SSID, the usual and practical requirement for joining a WLAN is that the network name is known and matches what the client sees on the APs.