Below are the “Big 3” colocation cost factors that will make up the majority of your monthly bill
Space
Space is the proximity that you will occupy inside of the colocation facility. Space is billed by the amount of rack space you occupy. It can sold in multi 1U, shared, or private half/full rack(s) increments.
Bandwidth
Bandwidth is billed by megabits per second (Mbps) circuit (sometimes less) and can be served to your rack’s networking equipment over a variety of mediums (i.e. copper, fiber).
Colocation vendors typically offer two different billing methods: capped and burstable billing.