Sampoorntech

ISO-OSI Reference Model Principal of OSI Reference Model The OSI reference model has 7 layers. The principles that were applied to arrive at the seven layers can be briefly summarized as   follows: A layer should be created where a different abstraction is needed. Each layer should perform a well-defined function. The function of each layer should be chosen with an eye toward defining internationally standardized protocols. The layer boundaries should be chosen to minimize the information flow across the interface The  number   of  layers  should   be   large   enough   that   distinct functions    need   not  be   thrown together    in the same layer out of necessity and small enough that architecture does not become unmanageble. Feature of OSI Model: Big picture of communication over network is understandable thr...