I have a Linksys router and I want to connect my PC to internet with it. how can I do this?
You will need a modem if your ISP provides the internet connection via a phone line. If your ISP provides the internet connection via a LAN cable, you don't need a modem.
Here's the example steps for you to connect your devices:
First connect your phone line to the modem, and then connect your router to the modem, and last connect your PC to the router. If you connect the internet via a LAN cable, you can bypass the modem and connect the router directly to the LAN port which is provided by your ISP. After all devices connected, power all up and use the browser on your PC to login to your router to setup an internet connection setting for the first time.
For example, open http://192.168.1.1 to open the router configuration page, enter the default user name and password when prompted and then setup a PPPoE connection. You should refer to your router manual to find the exact IP address and default user/password combination. Here is a list of some default user names and passwords, just FYI:
Default user names:
You will need a modem, and not just a router, to connect to the Internet.
If you don't have a modem, you'll have to sign up for Internet service and get one. A router will simply allow multiple computers to connect through one Internet connection.
You will have to consult with whatever ISP you sign up with on how to set up your router for their network. Most routers have similar settings, and most new routers make setup relatively simple. If you bought your Linksys router recently, it likely will have a setup CD with a wizard that will guide you through the setup process. However, all of this presumes that you already purchased an Internet subscription and received a modem in the mail.
The one thing to keep in mind is that most ISPs will send you a modem/router combination device by default, but when you sign up you should be able to say that you want just a modem (I prefer doing this myself). If you get just the modem, you will be able to use the router you have already.
This all depends on the ISP you go with. So, start there. If you have an ISP (or after you sign up with one), you may come back on here with more information and we may be able to give more specific advice.