Network layers are a conceptual division of network protocols, typically implemented as a protocol stack. Each layer addresses a specific set of concerns, such as addressing, routing, flow control, or error detection. The most well-known model is the OSI model, which has seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. These layers provide a structured approach to network communication, allowing different protocols to interact and ensuring data is transmitted reliably and efficiently. The TCP/IP model is another popular model and has fewer layers.
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