What is an IP address?

All computers and networks connected to Internet have a unique IP address. Without this type of addressing, it would be impossible for information to reach your computer, or for your computer to send information to another computer to the Internet. The IP part of TCP/IP (Transmission Control Protocol/Internet Protocol) is the cornerstone that enables forwarding and transmission of information across the Internet.

When you connect to the Internet via regular phone line, your ISP will assign you a dynamic IP address for the duration of your connection, Once you disconnect, the ISP is free to assign this IP to any other customer. An always-on broadband connection, on the other hand, is often assigned and static IP address.

That is not always the case; many broadband ISPs assign dynamic addresses. However, keep in mind that even if your broadband ISP assigns dynamic IP addresses, these can "stick" for hours or even days. In terms of security, your broadband capable computer is an easier target for hackers to find. Implementing security measures, especially a firewall, ensures protection from prying hackers.