..... so if you buy a dedicated server on a 100mbs unmetered conenction, you're probably sharing it with 6 other people. Many times, however, there is a set speed, such as 20mbs. So what does that all equate too? Well it means that while your server is connected to a 100mbs line, you server will only see 20mbs if the line is at peak usage. But when the line is fairly free, you'll share the leftovers. So say with 6 servers on the line, only 1 other is actually pulling any load on the line. Well then you may see 45mbs on your server. And with unmetered, there are no caps on monthly transfers. So if your host sets the minimum speed to 20mbs, then you will see at least 6TB every month of bandwidth. But you could also see more.
For a note, I once got 15TB on a 100mbs shared unmetered server. Was pretty sweet. Made that 160$ bill look like nothin.