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Grokking Computer Networking for Software Engineers

Multiplexing & Demultiplexing in UDP

Explore the concepts of multiplexing and demultiplexing in the UDP protocol. Understand how port numbers identify applications for sending and receiving datagrams, and how dynamic and well-known ports function within client-server communication.

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Ports

Here’s a quick refresher on what ports are because that needs to be crystal clear in order for you to understand multiplexing and demultiplexing.

  • Sockets, which are gateways to applications, are identified by a combination of an IP address and a 16-bit port number. That means 216=655362^{16}= 65536
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