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Azure Basics

Azure Region infrastructure

Region - One or more linked datacenters
Geography - Two or more regios in a geography or compliance erea.
Region Pairs - Region pair in Geography more tgen 300 miles away from each other. Only one region in a pair will get updates in a time.

Fault Domain - Seperate server rack of power and network in same datacenter.
Update Domain - Server in the same datacenter on a other update schedule.
Availability set - A config set of the fault and update domain.
Availability Zone - Two or three datacenters in the same region. A combination of a fault and update domain. The platform will only update one zone at a time. The datacenters are on seperate power systems and spread over one region with low latency connections.

Service Credit - Return percentage if SLA is not met.