CISSP All Domains Practice test 13

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.