Network and addresses
Tier III (data center level)
A data center reliability class: Tier III means redundant power and cooling, maintenance without downtime.
The Uptime Institute classification splits data centers into four levels. Tier III has redundant power, cooling and links, and any component can be serviced without stopping servers; the design availability is 99.98%.
Many providers write “Tier III” by design, without a certificate. It is not a lie, but a real certificate counts for more.