"if my user name is rvijay07 and the site of my provider
www.sprint.com how will the above line be set ?"
Your user name and provider name are irrelevant to the problem.
The Internet computers do all of their communication by using the four number addresses. You can also use number addresses in your web browser if you happen to know them. Number addressing will work even if /etc/resolv.conf is not set correctly. For example you can give your web browser the address:
http://216.164.86.134:8000/html/geaclogin.html
and you should be able to reach the Falls Church, Virginia, USA public library. This could be very handy if you want to check out a book from the Falls Church library.
But you rarely know the number address of a web site. You would probably know the Falls Church library as
www.falls-church.lib.va.us When you type that address into your web browser your web browser contacts a Domain Name Server and the DNS replies that the Falls Church library is at 216.164.86.134 Some web servers put a message at the bottom of the screen that they are resolving the address while they are doing so. Then the web browser connects to the number address and asks for the page that you want displayed.
Any program that uses the Internet such as an email client uses similar logic to translate letter addresses to number addresses.
All across the Internet there are specialized servers that do domain name translation. ppp needs to know what DNS is used by your ISP. ppp needs to know both the letter name and the number name of the DNS that your ISP uses. Some ISP have their DNS sitting on the same computer that you dial into. Some do not. So if you have to guess the DNS, guess that it is your ISP name (something like search sprint.com)
But rather than guess, call your ISP and ask him for both names of the DNS he uses. Then put the letter name of the DNS in the search field and the number name in the nameserver field.
"How do you set all those other 6 files or do you just skip them ? Thanks."
Rather than get into a big complicated explanation of each of those 6 files let's get the DNS problem fixed and then see if your Internet connection works completely or if there are further troubles.