CSMA CA (Carrier Sense Multiple Access Collision Avoidance): Used for systems that can either send
or receive like wireless. They check if the line is idle, if idle they send, if in use they wait a
random amount of time (milliseconds). If a lot of congestion the client can send a RTS (Request To
Send), and if the host (the wireless access point) replies with a CTS (Clear To Send), similar to a
token, the client will transmit. This goes some way to alleviating the problem of hidden nodes, in a
wireless network, the Access Point only issues a Clear to Send to one node at a time.