What is the largest TCP/IP network port number allowable

In TCP/IP, a port is software based end point in an Operating system. Each port is assigned a number. It is called port number. A port number can be 0 to 65535. There are UDP and TCP port numbers in the same range. ===== Common Protocol Numbers . Protocol Number. Internet Control Message Protocol (ICMP) 1. Transmission Control Protocol (TCP) 6 List of Well-Known TCP Port Numbers - Webopedia Reference Nov 02, 2017 Service Name and Transport Protocol Port Number Registry Jul 20, 2020 List of Common Network Port Numbers – Utilize Windows


Dynamic Host Configuration Protocol (DHCP) – Network

May 21, 2019

RFC 8357 - Generalized UDP Source Port for DHCP Relay