Hello Me Fett,
Firstly, I would suggest you, if you are entering in to the web hosting business than Business plan will be your partner to assist you. It is the documentation for your business about managing money, make it clear so that you understand it, setting goals and the ways to run your business successfully.
Secondly, DC means Data center where you can store, process, manage and exchange digital data and information.
Please let me know in case you have any questions, I will be glad to assist you
Thank you.