The static , hard-to-change parts of the application the detailed levels of semantics and syntax are abstracted by the architecture and the protocols used to implement it . This makes it easier to change providers of the service , since the detailed aspects of the requested transaction are communicated as part of the transaction itself . Additionally , in our daily routine we use telephone calls and other services for specific advantages . Placing a "phone call " is the same as asking the telephone system to...











SUBJECTS

