Which 802.11 management frame is sent when a client roams to another access point on the same SSID?

When a client roams to another access point (AP) within the same Extended Service Set (ESS), it sends a Reassociation Request frame. This frame informs the new AP that the client is already authenticated and associated with the network via another AP, allowing for a faster transition. An Authentication Request is used for initial authentication with an AP. An Association Request is sent after successful authentication to establish a data link with an AP. A Probe Request is used by a client to discover available APs in its vicinity.