In theory up to 10-20 Mbps download, but see below for more realistic numbers. Fast, always on, reliable unless too many users are trying to share bandwidth. Depending on how many other people are sharing bandwidth, you can get a small lag or a large hit in performance. A cable modem is a digital modem that uses a coaxial cable connection. The same line you use for your cable television can power your modem.
Cable modems are relatively easy to set up and provide a broad connection to the Internet.
Still, you can expect average downloads over 300 Kbps and somewhere around 600Kbps. That's extremely fast. Very fast downloads. For those in remote areas may be the only choice for high-speed access available. Uploads are not as speedy and generally require a standard phone line.