This keeps communication flowing. Because TCP and UDP port numbers are 16 bits in length, they fall in the range of 0 to 65,535, which are the smallest and largest decimal equivalents of the ...

For details about port numbers, see TCP/IP port. COMMON WELL-KNOWN PORTS Service Port Function HTTP 80 Web HTTPS 443 Web (secure) FTP 20,21 File transfer SFTP 22 File transfer (secure) FTPS ...

Also called "port mapping," port forwarding is directing traffic from the outside world to the appropriate server inside a local TCP/IP network. Internet services are identified by a standard port ...