Originally Posted by BoyWonder So TF is hosted on a single server?

TF is hosted on a dedicated server at http://www.handsonwebhosting.com/. You could have a site many times larger on a single dedicated server before you'd have to start thinking about getting another server.

Scaling to multiple servers is a pain. Only in the most extreme circumstances will you ever need to have a single site on more than one server. Often the first thing done is separating the database to a new server, then you put each site on a different network should your company have more than one. Splitting a single site onto many servers gets complex and requires additional equipment. When I was at Wintrust Mortgage we had a bunch of different servers ranging from a few simple web servers in the DMZ to internal servers and database servers that did more important tasks. We had everything hosted at a colocation a few miles away from the office.

If you don't know about networking you aren't going to be able to get any sort of a server setup working. If you find yourself in this situation you'll either have to hire a networking guy or just learn networking.