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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