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Lab Manuals for Computer Network - CN By Deepak Malav

  • Computer Network - CN
  • Practical
  • Computer Science Engineering
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Socket Programming Kameswari Chebrolu Reference: Beej's Guide to Network Programming

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Quote I hear and I forget I see and I remember I do and I understand -- Chinese Proverb

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Multiplexing/Demultiplexing Host-2 Host-1 Application Host-3 Application Application Transport Transport Transport Network Network Network Demultiplexing: Deliver segments to the right socket Multiplexing: Assemble segments such that they get delivered to right socket Source Port Destination Port Other fields in header Application Data Transport Layer Segment

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What is a socket?  Socket: An interface between an application process and transport layer    The application process can send/receive messages to/from another application process (local or remote) via a socket In Unix jargon, a socket is a file descriptor – an integer associated with an open file Types of Sockets: Internet Sockets, unix sockets, X.25 sockets etc  Internet sockets characterized by IP Address (4 bytes), port number (2 bytes)

Lecture Notes