What are Data Center Tiers?

Data center tiers are classification levels used to quickly identify the complexity and redundancy of the data center infrastructure being utilized.

Data center tiers definition

Data center tiers are a system used to describe specific kinds of data center infrastructure in a consistent way. Tier 1 is the simplest infrastructure, while Tier 4 is the most complex and has the most redundant components. Each tier includes the required components of all the tiers below it.