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Explanation: Physical, data link and network layers are network support layers and session, presentation and application layers are user support layers.
Network support layers:- The network support layers are Physical layer, Data link layer and Network layer. These deals with electrical specifications, physical connection, transport timing and reliability. User support layers: The user support layers are: Session layer, Presentation layer, Application layer. These allow interoperability among unrelated software system.
Network support layers:- The network support layers are Physical layer, Data link layer and Network layer. These deals with electrical specifications, physical connection, transport timing and reliability. User support layers: The user support layers are: Session layer, Presentation layer, Application layer. These allow interoperability among unrelated software system.