What are TCP and UDP port numbers?

What are TCP and UDP port numbers?
Unsourced or poorly sourced material may be challenged or removed. This is a list of TCP and UDP port numbers used by protocols for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for duplex, bidirectional traffic.
Which TCP ports should not be used?
TCP port 1645 must not be used. Old radacct port, RADIUS accounting protocol. Enabled for compatibility reasons by default on Cisco and Juniper Networks RADIUS servers. Official port is 1813. TCP port 1646 must not be used. Multicast Address Dynamic Client Allocation Protocol (MADCAP).
What is the registered port for radius?
Registered ports. Early deployment of RADIUS before RFC standardization was done using UDP port number 1645. Enabled for compatibility reasons by default on Cisco[citation needed] and Juniper Networks RADIUS servers. Official port is 1812. TCP port 1645 must not be used.
What port does CMC use for TCP-based transport?
“TCP-Based Protocol”. Certificate Management over CMS (CMC): Transport Protocols. IETF. p. 4. sec. 5. doi: 10.17487/RFC5273. RFC 5273. Retrieved 2017-11-10. When CMC messages are sent over a TCP-based connection There is no specific port that is to be used when doing TCP-based transport.
How many TCP ports do I Need?
The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) needed only one port for full-duplex, bidirectional traffic. The Stream Control Transmission Protocol (SCTP) and the Datagram Congestion Control Protocol (DCCP) also use port numbers.
What port does Xbox use for TCP?
TCP port 80. Arguably the single most famous port on the Internet, TCP port 80 is the default that HyperText Transfer Protocol (HTTP) Web servers listen on for Web browser requests. UDP port 88. The Xbox Live Internet gaming service uses several different port numbers including UDP port 88.
What ports do servers use for DHCP?
Dynamic Host Configuration Protocol servers use UDP port 67 to listen for requests while DHCP clients communicate on UDP port 68. TCP Ports 80 and 443. Arguably the single most famous port on the Internet, TCP port 80 is the default that HyperText Transfer Protocol Web servers listen on for Web browser requests.