This is something I have been wondering for a while...
I would like to know what exactly is in data centers.
What is required to run a DC, ie. connections, servers, power etc.
Just the main things as I have never seen a DC and I think the data center side of hosting is something I really don't know a lot about.

Also, apart from all hardware on the floor, what is in the NOC?
Is the NOC always inside the same building as the servers?