In the Company wireless LAN，  what is the function of the Service Set Identifier （SSID）？（）

• A、 The SSID must match on both the Company client and the Company access point and provides  MAC Address Authentication to authenticate the client to the access point.
• B、 The SSID should be configured on the Company client site only and provides data-privacy  functions and authentication to the access point.
• C、 The SSID must match on both the Company client and the Company access point and provides encryption keys for authentication to the access point.
• D、 The SSID must match on both the Company client and the Company access point. The SSID is  advertised in plain-text in the access point beacon messages.  
• E、 None of the other alternatives apply