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ATM (Asynchronous Transfer Mode)
 
ATM is a network technology based on transferring data in cells or packets of a fixed size. The cell used with ATM is relatively small compared to units used with older technologies. The small, fixed cell size allows ATM equipment to transmit video, voice, and data traffic over the same network and assures QOS (quality of service) for each service type. ATM creates a fixed channel, or route, between two points whenever data transfer begins. This differs from TCP/IP in which messages are divided into packets and each packet can take a different route from source to destination.
 
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