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31 Days Before Your CCENT Certification by Scott Bennett

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CCNA Discovery 1, Chapter 6

6.1.2: The protocols at each layer of the OSI model provide guidelines for the functions of that layer. Each of the following protocols operates at a different OSI model layer:

• An example of a protocol used at the application layer is Hypertext Transfer Protocol (HTTP). HTTP governs how a client application requests information and how a server responds.

• At the transport layer, Transmission Control Protocol (TCP) defines how communicating hosts can control the flow of information and acknowledge information received.

• At the network layer, the Internet Protocol (IP) defines how packets should be addressed and routed to their destination.

• At the data link layer, Ethernet is the most common protocol. IP packets ...

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