Comcast is a company that specializes in bringing both television and Internet access to consumers directly into their homes. Like many Internet service providers, Comcast has a variety of different "levels" and "types" of Internet service. Each plan has a different price and is aimed at a variety of users who are looking for diverse types of experiences from the Web.
If you want to connect devices in your home to the Internet over a wireless network, Comcast can send you a device that acts as a broadband modem and wireless router in one unit. This device creates your Internet connection and also broadcasts it within your home.
Comcast's main form of Internet access is via cable. This connects your home to the Internet by way of a long coaxial cable. This is similar to the way cable television service works. If you decide to get Comcast television and Internet service at the same time, both the television signals and the Internet signals will be simultaneously piped into your home via the same coaxial cable.
Comcast offers a basic mobile Internet service that allows you to access the Internet as you travel. This works in the form of a card that you plug into a USB port on your computer. This card acts as a type of USB modem that connects your computer with Comcast's data network, similar to the way smartphones access the Internet. Comcast's mobile broadband service is an additional monthly charge over its regular broadband service.
Comcast has different tiers of Internet service that are separated into categories by their download speed. For example, the lowest speed tier from Comcast that you can sign up for is a 6MB download speed, which costs $19.95 per month, as of January 2011. By comparison, the fastest tier is a 50MB download speed, which costs $99.95 per month, as of January 2011.