|The HTTP 1.1 protocol, as well as the advent of being able to put multiple domain names on the same IP address, made shared hosting possible; a hosting company no longer needs to have a separate IP address for each and every customer (which is good, because IP addresses can be hard to come by, expensive, and hard to move around if necessary).
At DreamHost, we use shared name-based hosting. It makes things a lot easier, and there is no difference at all for your site on the web.
If you want or need a unique IP (meaning nobody else's site is on your same IP), it comes standard with the Strictly Business plan. You can also add a unique IP to other plans for as little as $4.95 a month!
Please note, though, having a unique IP address does not mean your IP will never change --- these IPs are not STATIC.
Last updated: Jun 20, 2005.