What is the primary purpose of a beacon frame in a WLAN?

What is the primary purpose of a beacon frame in a WLAN?

• A. To advertise the network's SSID.
• B. To negotiate encryption keys.
• C. To initialize IP addressing.
• D. To convey user authentication data.

Answer: (A)

Beacon frames are periodic management transmissions from an access point that announce the presence of a WLAN and share basic network information. Their primary purpose is to advertise the network's SSID so devices can see the network name, decide which network to join, and synchronize with the network. When a client scans, it listens for beacons to build a list of available networks with their names, channels, and capabilities. The SSID shown in the beacon helps the device identify the correct network to connect to, while other parameters like channel and supported rates aid in proper connection setup. Key exchanges, IP addressing, and authentication data all occur after the device associates with the network, not through the beacon itself.

Beacon frames are periodic management transmissions from an access point that announce the presence of a WLAN and share basic network information. Their primary purpose is to advertise the network's SSID so devices can see the network name, decide which network to join, and synchronize with the network. When a client scans, it listens for beacons to build a list of available networks with their names, channels, and capabilities. The SSID shown in the beacon helps the device identify the correct network to connect to, while other parameters like channel and supported rates aid in proper connection setup. Key exchanges, IP addressing, and authentication data all occur after the device associates with the network, not through the beacon itself.