This trick is about how to increase the speed of airtel dsl DNS servers so that we experience increased speed in gprs and airtel broadband connections.since sometimes it tooks about 4 seconds for a query or it gets timed up due to the overload of the airtel server. 

So i started using OpenDSN server - which is a free and powerful DNS service. Use following DNS server address: 

Code: 
Preferred DNS server: 208.67.222.222 
Alternate DNS Server: 208.67.220.220 

HOW TO DO THIS: 

1. Click on Start button > Settings > Control Pannel> Network Connections 
2. Right click on YOUR "airtel dialup connection" or your Internet connection, 
Click on Properties button. 
3. iN general TAB, Select Internet Protocol (TCP/IP) 
4. Click on Properties button and Look for Preferred DNS Server: 
5. Enter the following values there, 
- 208.67.222.222 
- 208.67.220.220 
AND KEEP....OBTAIN IP ADDRESS AS AUTOMATIC. 
6. Save and close the windows. If you are using old version of windows you may need to reboot the system... 

To test new setting go to Start > Run > Type cmd 
Type nslookup command 
Now type domain name 
google.com[/]