Hi Speed Internet?

Because high speed internet - also called broadband - uses the ethernet card to get a faster connection. Typical DSL speeds are 1.5mbps and cable runs around 4mbps.

If you are referring to those dialup "High Speed" connections, they just use a different compression method that allows larger packets of data to be sent and received over a typical 56k line. The connection isn't any faster, the compression just makes it seem faster.

It's still dialup and it is still slow.

Yes you will either need a DSL modem or cable modem depending on your source of broadband.

Yes you do and your broadband provider will usually provide one to you. A lot of times local retailers like Best Buy will have promotions with local BB ISPs where you buy the modem from Best Buy and sign up for service with your local provider through them and you will get a rebate for the price of the modem and maye even a gift card or something as freebie.

Best Buy gets a kickback from the ISP and you get a free modem. Sounds like a good deal for everyone.