2Goals of ATM1.ATM, also known as cell relay, involves the transfer of data in discrete chunks called cells. Multiple logical connections can be multiplexed over a single path. This is similar to packet switching except that the packets are variable sized and cells are of a fixed size. 2.ATM is used in the WANs and is not constrained to a particular physical medium or data rate (155 Mbps, 622 Mbps, and 2.5 Gbps).3.ATM has minimal error and flow control capabilities to reduce the overhead of cells the overhead of protocol processing, enabling ATM to operate at high data rates.
3ATM Protocol Architecture
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