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Data Center Tiers

The Telecommunication Industry Association, an accreditation of American National Standards Institute (ANSI) published Telecommunications Infrastructure Standard for Data Centers in the year 2005. The standard defines data centers in four levels which are literally called as data center tiers. The level is determined on the basis of network uptime capability. For instance, the data center integrating with a single path for power and cooling distribution without redundant components but with 99.671% network uptime is fallen under tier 1. The tier II data center is one that has a single route to disseminate power and cooling along with the integration of redundant components as well as 99.741% network uptime. The third level is the tier III data center featuring with multiple power and cooling paths with redundant components and has the capacity of providing 99.982% network availability. Interestingly, the tier IV is the last and advanced level of data center tiers with multiple active power and cooling dissemination routes along with redundant components and proving 99.995% network availability.

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