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Ports August 10, 2005

Posted by Coolguy in Networks.
  • Data transmitted over the Internet is accompanied by addressing information that identifies the computer and the port for which it is destined.
  • The computer is identified by its 32-bit IP address, which IP uses to deliver data to the right computer on the network.
  • Ports are identified by a 16-bit number, which TCP and UDP use to deliver the data to the right application.
  • Port numbers range from 0 to 65,535 because ports are represented by 16-bit numbers
  • The port numbers ranging from 0 – 1023 are restricted; they are reserved for use by well-known services such as HTTP and FTP and other system services.


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