Ch1-Protocols - CECS 474 Computer Network Interoperability...

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CECS 474 Computer Network Interoperability CHAPTER 1 Network Protocols (Comer 4/e, Chapter 16) Protocol Suites and Layering Models Defn : Protocols are agreements about how communication should take place. They specify: Format of messages Meaning of messages Rules for exchanging messages Procedures for handling problems Network hardware functions at a very low level, and many problems can occur that need to be addressed by protocols: Bits can be corrupted or destroyed Entire packets can be lost Packets can be duplicated Packets can be delivered out of order Protocols can also be used to distinguish among: Multiple computers on a network Multiple applications on a computer Multiple copies of a single application on a computer Dr. Tracy Bradley Maples (Fall 2009) 1
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Sets of Protocols Sets of protocols are designed to work together. Each protocol solves a small part of the communications problem Sets of protocols are known as: -- Protocol Suites
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Ch1-Protocols - CECS 474 Computer Network Interoperability...

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