How to Configure a TCP/IP Connection in Windows Vista
Whether your IP address is assigned when you log on to the Internet or you have a static IP address, as with a cable modem or DSL, it's useful to know how to configure the TCP/IP connection in Windows Vista. Understanding the configuration options allows you to tinker with the settings until you get things working just the way you like it.
Choose Start→Network→click the Network and Sharing Center link.
The Network and Sharing Center provides links for a wide range of network features.
In the resulting Network and Sharing Center window, click the Manage Network Connections link.
The Manage Network Connections window shows a list of each type of Internet connection that has been configured on your computer broken down by type.
Right-click the connection you want to configure and then choose Properties.
The Properties dialog box contains options for letting you setting up the connection's protocols.
In the Connection Properties dialog box, click the Networking tab.
Select the Internet Protocol Version (TCP/IP) option and then click the Properties button.
Locate the TCP/IP protocol in the This Connection Uses the Following Items area. Be sure that the latest version of the TCP/IP is selected, even if earlier versions are also available and selected.
Allow addresses to be assigned automatically in the Internet Protocol (TCP/IP) Properties dialog box.
Select the Obtain an IP Address Automatically option and then click OK twice.
Although you can enter addresses manually in the Internet Protocol (TCP/IP) Properties dialog box, it is safest to let them be assigned automatically. That way, if your setup changes, you don’t have to go back and manually modify addresses. This also saves you the hassle of having to manually configure certain settings, such as the Domain Name Service, which implements the Domain Name System (DNS).