What do you understand by service access point, Computer Networking

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Q. How two adjacent layers communicate in a layered network or what do you understand by Service Access Point?

Ans: In layered network, each layer has several entities and entities of layer i give service to the entities of layer i+1. The services will be accessed through service access point (SAP), which has some address through which the layer i+1 will access the services provided by layer.

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