200 datacenter by this time. each datacenter has thousands of servers
4 million physical servers
Availibility zones are unique physical locations witin a single region
Minimum of 3 availibility zones in the region. Each Availibility zone is made up of one ore mroe datacenters equipped with independent power, cooling and networking
Some services like zone redundant storage in azure storage accounts will automatically replicate your data automatically across all the zones in the region.
Every region is located within a geography which in azure is a group of regions that define a boundary for data residency and disaster recovery
Geography is a single country or can be made up of multiple countries
When you choose geo redundant storage , azure automatically makes copies of your data across the regions in region pair
Factors to choose a region
proximity to users
service availibility
Not all services will be available to a particular region
There are some services that are non regional.. Azure bot services…
When you access a resource is azure, the traffic goes from your computer through your internet service provider to a point of presence or PoP thats managed by microsoft where it entrs into the microsoft flobal network
MS has 185 pops around the world, so you get routed to the one closest to your location.