Which of the following are two statements that best describe 802.11-1999 (R2003) network operation with regard to association and re-association processes? Choose 2

A.
When actively scanning for a network to join, clients transmit Probe Request frames, which contain most of the same information found in beacons.

B.
Access points can ignore stations using a null (blank) SSID field in their Probe Request frames, but must respond with a Probe Response frame if a station has a specific SSID matching their own.

C.
In order to provide seamless roaming, some vendors allow a station to associate with a new access point while still associated with the old one as long as both access points are from the same vendor.

D.
When a station is in the cell range of multiple access points, it will associate with an access point that uses active scanning before associating with an access point that uses passive scanning.

E.
A station cannot attempt to associate with an access point until that access point authenticates the station.