TCP/IP is the set of communications protocols used for the Internet and other similar networks. TCP stands for Transmission Control Protocol and IP stands for Internet Protocol. The TCP/IP model consists of four layers (RFC 1122). From lowest to highest, these are the Link Layer, the Internet Layer, the Transport Layer, and the Application Layer. The Internet Protocol Suite was developed by Defense Advanced Research Projects Agency (DARPA) in the early 1970s. In TCP/IP Settings you can configure the following options. You can change IP Address IPV4/IPV6 IP IP is the primary protocol in the Internet Layer of the Internet Protocol Suite and has the task of delivering distinguished protocol datagrams (packets) from the source host to the destination host solely based on their addresses. You can also configure DNS server address, The Domain Name System makes it possible to assign domain names to groups of Internet users in a meaningful way, independent of each user’s physical location. Follow the steps given below to change TCP/IP Settings in Windows Vista.
1. Click the Start button and Open Network Connections , Open Control Panel, Open Network and Internet, Open Network and Sharing Center, and then Open Manage network connections.
2. Right-click the connection that you want to change, and then click Properties. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
3. Click the Networking tab. Under This connection uses the following items, click either Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6), and then clickProperties.
4. To specify IPv4 IP address settings, do one of the following:
•To obtain IP settings automatically, click Obtain an IP address automatically, and then click OK.
•To specify an IP address, click Use the following IP address, and then, in the IP address, Subnet mask, and Default gateway boxes, type the IP address settings.
5. To specify IPv6 IP address settings, do one of the following:
•To obtain IP settings automatically, click Obtain an IPv6 address automatically, and then click OK.
•To specify an IP address, click Use the following IPv6 address, and then, in the IPv6 address,Subnet prefix length, and Default gateway boxes, type the IP address settings.
6. To specify DNS server address settings, do one of the following:
•To obtain a DNS server address automatically, click Obtain DNS server address automatically, and then click OK.
•To specify a DNS server address, click Use the following DNS server addresses, and then, in thePreferred DNS server and Alternate DNS server boxes, type the addresses of the primary and secondary DNS servers.
7. To change DNS, WINS, and IP settings, click Advanced.