What is it? Set of datacenters deployed within a latency-defined perimeter and connected through a dedicated regional low-latency network.

Remember:
- A region is a set of datacenters deployed within a latency-defined perimeter and connected through a dedicated regional low-latency network.
- Geography is an area of the world containing at least one Azure region
- A regional service is an Azure service that is deployed regionally and enables the customer to specify the region into which the service will be deployed.
- A non regional service is an Azure service for which there is no dependency on a specific Azure region. Non-regional services are deployed to two or more regions and if there is a regional failure, the instance of the service in another region continues servicing customers.
- Azure services and capacity can vary by region, so it's important to understand if targeted regions offer required capabilities.

What is it? High-availability offering that protects your applications and data from datacenter failures

Remember:
- Availability Zones are unique physical locations within an Azure region.
- Availabiliy Zones are Unique physical locations within a region and protect your applications and data from datacenter failures
- Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking.
- An Availability Zone in an Azure region is a combination of a fault domain and an update domain. - Azure services that support Availability Zones fall into two categories:

What is it? Container in which the metadata for a logical group of resources is stored.

Remember:
- Resource Manager provides management layer that enables you to create, update, and delete resources in your Azure account.
- RG can include all the resources for the solution, or only those resources that you want to manage as a group
- RG stores metadata about the resources.
- Azure role-based access control (Azure RBAC) is the way that you manage access to resources in Azure.

What is it? Image service instances that provide on-demand and scalable computing resources with usage-based pricing.

Remember:
- Each virtual machine provides its own virtual hardware including CPUs, memory, hard drives, network interfaces and other devices.
- a virtual machine behaves like a server: it is a computer within a computer that provides the user with the same experience they would have on the host operating system itself.
- In addition to various Windows Server versions, Azure supports all of the major Linux distributions, including Red Hat Enterprise Linux, CentOS, CoreOS, Debian, Oracle Linux, SUSE Linux Enterprise, openSUSE and Ubuntu.
- Most Azure VMs come with temporary non-persistent local storage. Additionally, Azure offers HDD and SSD-based disk storage for data.

What is it? HTTP-based service for hosting web applications, REST APIs, and mobile back ends.

Remember:
- Multiple languages and frameworks - ASP.NET, ASP.NET Core, Java, Ruby, Node.js, PHP, or Python.
- Run PowerShell and other scripts or executables as background services.
- Managed production environment
- Containerization and Docker
- DevOps optimization
- Global scale with high availability
- Connections to SaaS platforms and on-premises data
- Security and compliance
- Application templates
- Visual Studio and Visual Studio Code integration
- API and mobile features
- Serverless code
- With App Service, you pay for the Azure compute resources you use