# AWS Global Infrastructure

The Primary two items are given below.

* Availability Zones
* Regions

Apart from this, they also have

* Edge Locations
* Regional Edge Caches

### Availability Zones (AZs)

AZs are the physical data centers of AWS.

This is where the actual computing, storage, network, and database resources are hosted that we as consumers, provision within our Virtual Private Clouds (VPCs).

A common misconception is that a **single availability zone equals a single data center**. Multiple data centers located closely form a single availability zone.

Each AZ will have another AZ in the same geographical area. Each AZ will be isolated from others using a separate power/network like DR.

Many AWS services use low latency links between AZs to replicate data for high availability and resilience purposes.

Multiple AZs are defined as an AWS Regions. (Example: Virginia)

<figure><img src="/files/zghmEht8xXWS7JpnmGtW" alt=""><figcaption></figcaption></figure>

### Regions <a href="#regions" id="regions"></a>

Every Region will act independently of the others, containing at least two Availability Zones.

Interestingly, only some AWS services are available in some regions.

* US East (N. Virginia) *us-east-1*
* US East (Ohio) *us-east-2*
* EU (Ireland) *eu-west-1*
* EU (Frankfurt) *eu-central-1*

***Note**: As of today, AWS is available in 27 regions and 87 AZs*&#x20;

{% embed url="<https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html>" %}


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