Services offered

Most colocation centres offer different types of services to customers ranging from dedicated suites/rooms or cages to smaller racks or partial racks. Some colocation centres also offer some degree of service level agreements to support a wide range of computer and network related services, for example, server reboots, hardware replacements and software updates.
There are a few key differences between a dedicated server and colocation servers. Dedicated servers tend to be owned and rented out, while a colocation server is one that the client owns.
Some colocation centres feature a "meet-me-room" where the different carriers housed in the centre can efficiently exchange data. Most peering points sit in colocation centres. These sites are often used for web hosting. Most colocation centres have high levels of physical security and multiple redundant power and humidity/air-conditioning systems.
Confusingly, one company can operate a colocation centre, another can provide the bandwidth, whereas a third company would rent a cage inside the centre, renting out racks to hosting providers which would rent the servers themselves to actual clients. Any and all of those companies will claim ownership of the facility and will feature photos and descriptions of it on their web sites. At the actual physical location various ID cards with various logos will be present, including those of the company that built/rents/owns the actual building.