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What are the layers of OSI?
Physical, data link, network, transport, session, presentation, application
What are the layers of TCP/IP?
Link/network, internet, transport, frame
Acronym for OSI
Please Do Not Throw Sausage Pizza away
Main function of layer 1
Physical connection between devices
Main function of layer 2
Data link, to ensure data transfee is free of errors
Main function of layer 3
Network, create and address packets to facilitate between networks
Main function of layer 4
Transport, break info, sequence, reform
Main function of layer 5
Session, establishment of connection, maintenance of sessions, security
Main function of layer 6
Presentation, handles the conversion of data into forms recognizable by the system
Main function of layer 7
Application, includes the common application programming interfaces (API)