In TCP/IP and UDP networks, a port is an endpoint to a logical connection and the way a client program specifies a specific server program on a computer in a network. Some ports have been preassigned ...

Learn how to use netstat commands to watch open ports. Using the –b, -o, -an, interval, and tasklist commands, you can find IP addresses, port numbers, connections, process IDs and associated ...

Note that the IP protocol number is not the same as the port number (see TCP/IP port), which refers to a higher level, such as the application layer.

Port Query (PortQry.exe) is a command-line utility in the Windows operating system that you can use to help troubleshoot TCP/IP connectivity issues.

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 ...