Basic HTML version of Foils prepared October 2 98

Foil 9 Simplified communication protocol model

From Introduction to Architecture of World Wide Web CPS406/606 -- Fall Semester 98. by Nancy J. McCracken


1 We simplify the model to the four lowest software layers - user applications use the process layer and the remaining three are usually included in the operating system, such as Unix, which has an OSI stack to process messages through the layers.
2 Process
3 Network
4 Data Link
5 Transport
6 User applications
7 Host-to-host layer: may establish virtual circuit for messages
8 Determines route to transmit packets
9 Transforms raw messages into one that appears free of transmission errors, transmits data cells and processes acknowledgement cells.

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