MS Azure - Fundamentals (Udemy)

Resources and Resource Group

When creating a resource, Azure prompts for a Region for a resource. The region is the location where you want to host the product/ service. Where you host it matters. See the figure below. If all your customers are located in Aus and are going to access the service (which is located in the West USA), then there will be latency. 

• There are services in place in azure (Content network delivery service) that allow distributing and data and traffic across multiple regions. 
• Products by region - list of all products/services per region. 
• Not every service is available in every region. 
• Commonly used services - are available in all regions. But for others, you need to ensure they are available. (e.g. Azure cognitive search is not available in the Canada region).
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Azure Subscriptions

All Azure resources get billed against a particular Subscription

• An Azure subscription is a logical container used to provision resources in Azure. It holds the details of all your resources like virtual machines (VMs), databases, and more. When you create an Azure resource like a VM, you identify the subscription it belongs to

• You may have several departments in your organization that could have differing needs for the resources. Thru subscriptions, you can keep track of the billing for each. 

Azure Subscription Types

The Virtual Machine Service

• You don't need to manage the underlying physical server.
• No need for capital for physical server
• Pay for only running cost of the server provided by Azure
• You can pay as you go, terminate the virtual server when you don't need
• Host different types of workloads on the server
• You can deploy both Windows as well as Linux based servers. 

Resources deployed along with a Virtual Machine (VM)

• VM sits on a virtual disk, and is provided a private and public IP. The traffic is routed thru a virtual NIC. 
• All of this resides in a Virtual Network
• NSG- network security group is a kind of security firewall (decides what kind of traffic flow into and out of the virtual machine).