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09. Transport - Transport Layer Protocols 1 Why do we need...

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1 Transport Layer Protocols
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Communication Networks © Kang Xi, Polytechnic Institute of NYU 2 Why do we need Transport Layer? IP layer: global addressing, hop-by-hop forwarding Transport layer: end-to-end (reliable) communication Distinguish packets to different applications based on the same IP address (TCP & UDP) End-to-end flow control and error control (TCP)
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