Ch-4

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Chapter 4 OSI Transport Layer **

Why is there a need for the transport layer? What is the role of the transport layer as it provides the end-to-end transfer of data between applications? What is the role of two TCP/IP transport layer protocols: TCP and UDP? How do the key functions of the transport layer protocol, including reliability, port addressing, and segmentation, work? How do TCP and UDP handle the key functions? When is it appropriate to use TCP or UDP, and what are some examples of applications that use each protocol?