Describe the Open Systems Interconnection (OSI) protocol model.

Describe the Open Systems Interconnection (OSI) protocol model.
Identify the advantages and disadvantages of circuit switching and packet switching—X.25, Frame Relay, Asynchronous Transfer Mode2, and Transmission Control Protocol/Internet Protocol (TCP/IP)—regarding performance, speed and throughput potential, and end-to-end transmission reliability and predictability.
Identify major protocols for circuit switching and packet switching

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