The internet relies on a system of addresses that treats every computer, tablet and smartphone as a distinct device, allowing all of them to communicate with each other. Because many kinds of devices ...

A static IP address gives a fixed address to your computer on the local network at your business. Port forwarding is used by computers on the Internet to connect to a specific device on your internal ...

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. The tool reports the port status of TCP and UDP ...

The numeric identification of the upper layer protocol that an IP packet should be sent to. The number is stored in the header that is prefixed to an IP packet. Note that the IP protocol number is not ...

Netstat, the TCP/IP networking utility, has a simple set of options and identifies a computer’s listening ports, along with incoming and outgoing network connections. This data can be very helpful if ...