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 ...

Need to know the IP address of your router, as assigned by your ISP, or the IP of your computer, as assigned by your router? These numbers are easy to find when you know where to look. I've been ...

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 ...

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 ...

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 ...

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 ...

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 ...

To find the IP address of your router, you'll just need to open your computer or smartphone's internet settings page. Once you've found your router's IP address, you can use it to open your router's ...

You’ve heard about it before: an unknown online assailant has been inundating someone in your town with bothersome messages. Luckily, even though that person’s ...