![]() ![]() On Unix-like operating systems, aprocess must execute with superuser privileges to be able to bind a network socket to an IP address using oneof the well-known ports.Well-known portsPortTCPUDPD escriptionStatus0N/AN/AIn programming APIs (not in communication between hosts),requests a system-allocated (dynamic) portN/A0 TCPUDPR eservedOfficial1 TCPUDPTCP Port Service Multiplexer (TCPMUX).Ĥ Historic. ![]() They are used bysystem processes that provide widely used types of network services. Multiple use: Multiple applications are known to use this portsThe port numbers in the range from 0 to 1023 are the well-known ports or system ports. However, many unofficial uses of both well-known and registered portnumbers occur in legend2 Well-known ports3 Registered ports4 Dynamic, private or ephemeral ports5 See also6 References7 External linksTable legend Official: Port is registered with IANA for the application.ģ Unofficial: Port is not registered with IANA for the application. They usually use port numbers that match theservices of the corresponding TCP or UDP implementation, if Internet Assigned numbers Authority (IANA) is responsible for maintaining the official assignments ofport numbers for specific uses. The even-numbered ports were not used,and this resulted in some even numbers in the well-known port numberrange being unassigned.Ģ The Stream Control Transmission Protocol(SCTP) and the Datagram Congestion Control Protocol (DCCP) alsouse port numbers. Later, the Transmission Control Protocol (TCP)and the user Datagram Protocol (UDP) needed only one port for full-duplex, bidirectional traffic. Later, the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) needed only one port for full-duplex, bidirectional traffic.ġ /etc/services, a service namedatabase file on Unix-like operatingsystems.List of TCP and UDP port numbersFrom Wikipedia, the free encyclopediaThis is a list of Internet socket port numbers used by protocols of thetransport layer of the Internet Protocol Suite for the establishment ofhost-to- host, port numbers were used by the Network Control Program(NCP) in the ARPANET for which two ports were required for half-duplex transmission. Originally, port numbers were used by the Network Control Program (NCP) in the ARPANET for which two ports were required for half-duplex transmission. The even-numbered ports were not used,and this resulted in some even numbers in the well-known port numberrange being unassigned. etc/services, a service namedatabase file on Unix-like operatingsystems.List of TCP and UDP port numbersFrom Wikipedia, the free encyclopediaThis is a list of Internet socket port numbers used by protocols of thetransport layer of the Internet Protocol Suite for the establishment ofhost-to- host, port numbers were used by the Network Control Program(NCP) in the ARPANET for which two ports were required for half-duplex transmission. Example: quiz answers Search List of TCP and UDP port numbers - GitHub Pages
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