ATM Adaptation Layers or Layer model reference adaptive techniques Asynchronous Transfer Mode is a layer responsible for producing 48-oktetowych datagrams, which are used as loads of ATM useful cells. Originally created five different AAL layers numbered from 1 to 5, each of which was designed to support one of the four classes of services: A, B, C or D. It should be noted that each class supports broadcasts in a different way in connection with What needs to be installed in the terminal stations of another set of protocols. incl