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What are the standard TCP/IP port numbers used by the operating system and not available to the users?

April 26, 2017IP Numbers operating system port standard TCP Used Users

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What are the standard TCP/IP port numbers used by the operating system and not available to the users?

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Port numbers which are fixed for some services are not available for programming/configuration by the user are known as well-known port numbers. The well-known port numbers for Compaq NonStop Himalaya systems are listed in the file $SYSTEM.ZTCPIP.SERVICES. The following is a dump of a typical SERVICES file.