Definition: A data center is a facility used to house computer systems and associated components, such as telecommunications and storage systems. It generally includes redundant or backup power supplies, redundant data communications connections, environmental controls (air conditioning, fire suppression, etc.), and special security devices.
Data center classification
The TIA-942: Data Center Standards Overview describes the requirements for the data center infrastructure. The simplest among the four tiers is a Tier 1 data center, which is basically a computer room, following basic guidelines for the installation of computer systems. The most stringent level is a Tier 4 data center, which is designed to host mission critical computer systems, with fully redundant sub-systems and compartmentalized security zones controlled by biometric access controls methods.
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