The OSI Network Layer is responsible for sending packets across different networks, whereas the OSI Transport Layer handles end-to-end message delivery. These layers correspond to the Internet and Transport Layers in the TCP/IP Reference Model, respectively (see FIGURE 5-1).
FIGURE 5-1 OSI model compared to the TCP/IP model.
NOTE
The term router also refers to a Layer 3 switch. Router is the more commonly used term in networking.
The Network Layer of the OSI model is where the Internet Protocol (IP) operates ...
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