Layer 2 data link layer: This layer implements data sub-frame and deals with flow control. The layer also
designates topology and provides hardware addressing; Layer 3 network layer: This layer creates links between
two nodes by addressing, including the routing and data trunking through interconnected network; Layer 4
transport layer: routine data transmission, connected or non-connected, Includes full- duplex or half-duplex,
flow control and error recovery services;
Layer 2 data link layer: This layer implements data sub-frame and deals with flow control. The layer also
designates topology and provides hardware addressing; Layer 3 network layer: This layer creates links between
two nodes by addressing, including the routing and data trunking through interconnected network; Layer 4
transport layer: routine data transmission, connected or non-connected, Includes full- duplex or half-duplex,
flow control and error recovery services;
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