Cloud Infra

• Generally the top public clouds (AWS, Azure, GCP) have their own backbone network (Global network)
• In the Cloud we have Region or a location.
• Most of the clouds dont run everything at one place in a Region, they atleast find 3 locations 30-40 kms away from each other which are referred as Zones or Availability Zones(AZ).
• In each of the Zone (AZ) we have many datacenters.
  

AWS Global Infrastructure

• AWS has Regions and each region will have atleast 3 availability zones

Azure Global Infrastructure

• Azure has Regions with Zones and Regions without Zones
• Zone number is always 3

AWS VPC and Global infra

• Region list
• VPC is created a Region level and subnet is created at an AZ level
• When we create a vpc for an application which has web servers and possible a database
  
• AWS VPC subnets are private by default

Azure Virtual network and Globa infra

• Refer Here for list of azure regions
• Virtual network is created at a region level and subnet also at region level
  
• Azure Vnet subnets are public by default

Lets create a virtual network in Azure

• Watch classroom recording for steps.