Data center is a premise inside the office that stores all the data flowing within the organization or going out to or coming in from other places. Managing this data is a big responsibility but it is done efficiently by engineers who work at such centers. This data could be either the one stored in the official systems, or the one transferred through internet-based servers.
The terms big data and cloud computing find their relevance from data hubs in the organizations. It is a tough task to keep all the data safe and secure and more than that organized for working upon it.