Asynchronous Transfer Mode (ATM)

Asynchronous Transfer Mode (ATM)Arjan DurresiDepartment of Computer Science,Louisiana State University,Baton Rouge, LA 70803 Email: JainDepartment of Computer Science and Engineering,Washington University in St. Louis,St. Louis, MO 63130 Email: Transfer mode (ATM) is a cell-oriented switching and multiplexingtechnology that uses fixed-length (53 byte; 48 bytes of data, and 5 bytes of headerinformation) packets called cells to carry various typesof traffic, such as data,voice, video, multimedia, and so on, through multiple classes of services. ATM is a1connection-oriented technology, in which a connection is established between the twoendpoints before the actual data exchange provides a highly complex technology, with features intended for applicationsranging from global telco networks to private local area computer networks. ATM hasbeen a partial success as a technology, with widespread deployment, but generally onlyused as a transport for IP traffic; its goal of providing a single integrated end-to-endtechnology for LANs, public networks, and user services haslargely failed.

switching protocol. ATM remains widely deployed, and is used as a multiplexing service in DSL networks, where its compromises fit DSL’s low-data-rate needs well. In turn, DSL networks support IP (and IP services such as VoIP) via PPP over ATM. ATM will remain deployed for some time in higher-speed interconnects where carriers have

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