Services Connectionoriented And Connectionless

The issues such as routing decisions and architectures have a major impact on connection-oriented services, where B-ISDN/ATM end nodes have to maintain or get access to lookup tables, which translate destination addresses into circuit paths. These circuit path lookup

10Padded means adding "dummy" octets, octets that do not carry any significance or information.

20.7 SERVICES: CONNECTION-ORIENTED AND CONNECTIONLESS 527

tables, which differ at every node, must be maintained in a quasi-real-time fashion. This will have to be done by some kind of routing protocol.

One way to resolve this problem is to make it an internal network problem and use a connectionless service as described in ITU-T Rec. I.364 (Ref. 11). We must keep in mind that ATM is basically a connection-oriented service. Here we are going to adapt it to provide a connectionless service.

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