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Azure DNS is a hosting service for DNS domains that provides name resolution by using Microsoft Azure infrastructure. By hosting your domains in Azure, you can manage your DNS records using the same credentials, APIs, tools, and billing as your other Azure services.

Benefits of Azure DNS

Azure DNS uses the scope and scale of Microsoft Azure to provide numerous benefits, including:

• Reliability and performance
• Security
• Ease of Use
• Customizable virtual networks
• Alias records

Reliability and performance

DNS domains in Azure DNS are hosted on Azure’s global network of DNS name servers, providing resiliency and high availability. Azure DNS uses anycast networking, so the closest available DNS server answers each DNS query, providing fast performance and high availability for your domain.

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Azure ExpressRoute lets you extend your on-premises networks into the Microsoft cloud over a private connection, with the help of a connectivity provider. This connection is called an ExpressRoute Circuit. With ExpressRoute, you can establish connections to Microsoft cloud services, such as Microsoft Azure and Microsoft 365. This feature allows you to connect offices, datacenters, or other facilities to the Microsoft cloud. Each location would have its own ExpressRoute circuit.

Connectivity can be from an any-to-any (IP VPN) network, a point-to-point Ethernet network, or a virtual cross-connection through a connectivity provider at a colocation facility. ExpressRoute connections don’t go over the public Internet. This setup allows ExpressRoute connections to offer more reliability, faster speeds, consistent latencies, and higher security than typical connections over the Internet.

Features and benefits of ExpressRoute

There are several benefits to using ExpressRoute as the connection service between Azure and on-premises networks.

• Connectivity to Microsoft cloud services across all regions in the geopolitical region.
• Global connectivity to Microsoft services across all regions with the ExpressRoute Global Reach.
• Dynamic routing between your network and Microsoft via Border Gateway Protocol (BGP).
• Built-in redundancy in every peering location for higher reliability.

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A virtual private network (VPN) uses an encrypted tunnel within another network. VPNs are typically deployed to connect two or more trusted private networks to one another over an untrusted network (typically the public internet). Traffic is encrypted while traveling over the untrusted network to prevent eavesdropping or other attacks. VPNs can enable networks to safely and securely share sensitive information.

VPN gateways

A VPN gateway is a type of virtual network gateway. Azure VPN Gateway instances are deployed in a dedicated subnet of the virtual network and enable the following connectivity:

• Connect on-premises datacenters to virtual networks through a site-to-site connection.
• Connect individual devices to virtual networks through a point-to-site connection.
• Connect virtual networks to other virtual networks through a network-to-network connection.

All data transfer is encrypted inside a private tunnel as it crosses the internet. You can deploy only one VPN gateway in each virtual network. However, you can use one gateway to connect to multiple locations, which includes other virtual networks or on-premises datacenters.

When setting up a VPN gateway, you must specify the type of VPN – either policy-based or route-based. The primary distinction between these two types is how they determine which traffic needs encryption. In Azure, regardless of the VPN type, the method of authentication employed is a preshared key.

• Policy-based VPN gateways specify statically the IP address of packets that should be encrypted through each tunnel. This type of device evaluates every data packet against those sets of IP addresses to choose the tunnel where that packet is going to be sent through.
• In Route-based gateways, IPSec tunnels are modeled as a network interface or virtual tunnel interface. IP routing (either static routes or dynamic routing protocols) decides which one of these tunnel interfaces to use when sending each packet. Route-based VPNs are the preferred connection method for on-premises devices. They’re more resilient to topology changes such as the creation of new subnets.

Use a route-based VPN gateway if you need any of the following types of connectivity:

• Connections between virtual networks
• Point-to-site connections
• Multisite connections
• Coexistence with an Azure ExpressRoute gateway

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Azure virtual networks and virtual subnets enable Azure resources, such as VMs, web apps, and databases, to communicate with each other, with users on the internet, and with your on-premises client computers. You can think of an Azure network as an extension of your on-premises network with resources that link other Azure resources.

Azure virtual networks provide the following key networking capabilities:

• Isolation and segmentation
• Internet communications
• Communicate between Azure resources
• Communicate with on-premises resources
• Route network traffic
• Filter network traffic
• Connect virtual networks

Azure virtual networking supports both public and private endpoints to enable communication between external or internal resources with other internal resources.

• Public endpoints have a public IP address and can be accessed from anywhere in the world.
• Private endpoints exist within a virtual network and have a private IP address from within the address space of that virtual network.

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If you need to host your application on Azure, you might initially turn to a virtual machine (VM) or containers. Both VMs and containers provide excellent hosting solutions. VMs give you maximum control of the hosting environment and allow you to configure it exactly how you want. VMs also may be the most familiar hosting method if you’re new to the cloud. Containers, with the ability to isolate and individually manage different aspects of the hosting solution, can also be a robust and compelling option.

There are other hosting options that you can use with Azure, including Azure App Service.

Azure App Service

App Service enables you to build and host web apps, background jobs, mobile back-ends, and RESTful APIs in the programming language of your choice without managing infrastructure. It offers automatic scaling and high availability. App Service supports Windows and Linux. It enables automated deployments from GitHub, Azure DevOps, or any Git repo to support a continuous deployment model.

Azure App Service is a robust hosting option that you can use to host your apps in Azure. Azure App Service lets you focus on building and maintaining your app, and Azure focuses on keeping the environment up and running.

Azure App Service is an HTTP-based service for hosting web applications, REST APIs, and mobile back ends. Azure App Service supports multiple technologies, including programming languages like Java, PHP, Python, and JavaScript (via Node.js), as well as frameworks such as .NET and .NET Core. Azure App Service supports both Windows and Linux environments.

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Azure Functions is an event-driven, serverless compute option that doesn’t require maintaining virtual machines or containers. If you build an app using VMs or containers, those resources have to be “running” in order for your app to function. With Azure Functions, an event wakes the function, alleviating the need to keep resources provisioned when there are no events.

Benefits of Azure Functions

Using Azure Functions is ideal when you’re only concerned about the code running your service and not about the underlying platform or infrastructure. Functions are commonly used when you need to perform work in response to an event (often via a REST request), timer, or message from another Azure service, and when that work can be completed quickly, within seconds or less.

Functions scale automatically based on demand, so they may be a good choice when demand is variable.

Azure Functions runs your code when it triggers and automatically deallocates resources when the function is finished. In this model, Azure only charges you for the CPU time used while your function runs.

Functions can be either stateless or stateful. When they’re stateless (the default), they behave as if they restart every time they respond to an event. When they’re stateful (called Durable Functions), a context is passed through the function to track prior activity.

Functions are a key component of serverless computing. They’re also a general compute platform for running any type of code. If the needs of the developer’s app change, you can deploy the project in an environment that isn’t serverless. This flexibility allows you to manage scaling, run on virtual networks, and even completely isolate the functions.

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While virtual machines are an excellent way to reduce costs versus the investments that are necessary for physical hardware, they’re still limited to a single operating system per virtual machine. If you want to run multiple instances of an application on a single host machine, containers are an excellent choice.

What are containers?

Containers are a virtualization environment. Much like running multiple virtual machines on a single physical host, you can run multiple containers on a single physical or virtual host. Unlike virtual machines, you don’t manage the operating system for a container. Virtual machines appear to be an instance of an operating system that you can connect to and manage. Containers are lightweight and designed to be created, scaled out, and stopped dynamically. It’s possible to create and deploy virtual machines as application demand increases, but containers are a lighter weight, more agile method. Containers are designed to allow you to respond to changes on demand. With containers, you can quickly restart if there’s a crash or hardware interruption. One of the most popular container engines is Docker, and Azure supports Docker.

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Another type of virtual machine is the Azure Virtual Desktop. Azure Virtual Desktop is a desktop and application virtualization service that runs on the cloud. It enables you to use a cloud-hosted version of Windows from any location. Azure Virtual Desktop works across devices and operating systems, and works with apps that you can use to access remote desktops or most modern browsers.

Enhance security

Azure Virtual Desktop provides centralized security management for users’ desktops with Microsoft Entra ID. You can enable multifactor authentication to secure user sign-ins. You can also secure access to data by assigning granular role-based access controls (RBACs) to users.

With Azure Virtual Desktop, the data and apps are separated from the local hardware. The actual desktop and apps are running in the cloud, meaning the risk of confidential data being left on a personal device is reduced. Additionally, user sessions are isolated in both single and multi-session environments.

Multi-session Windows 10 or Windows 11 deployment

Azure Virtual Desktop lets you use Windows 10 or Windows 11 Enterprise multi-session, the only Windows client-based operating system that enables multiple concurrent users on a single VM. Azure Virtual Desktop also provides a more consistent experience with broader application support compared to Windows Server-based operating systems.

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With Azure Virtual Machines (VMs), you can create and use VMs in the cloud. VMs provide infrastructure as a service (IaaS) in the form of a virtualized server and can be used in many ways. Just like a physical computer, you can customize all of the software running on your VM. VMs are an ideal choice when you need:

• Total control over the operating system (OS).
• The ability to run custom software.
• To use custom hosting configurations.

An Azure VM gives you the flexibility of virtualization without having to buy and maintain the physical hardware that runs the VM. However, as an IaaS offering, you still need to configure, update, and maintain the software that runs on the VM.

You can even create or use an already created image to rapidly provision VMs. You can create and provision a VM in minutes when you select a preconfigured VM image. An image is a template used to create a VM and may already include an OS and other software, like development tools or web hosting environments.

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In addition to large scale migration using services like Azure Migrate and Azure Data Box, Azure also has tools designed to help you move or interact with individual files or small file groups. Among those tools are AzCopy, Azure Storage Explorer, and Azure File Sync.

AzCopy

AzCopy is a command-line utility that you can use to copy blobs or files to or from your storage account. With AzCopy, you can upload files, download files, copy files between storage accounts, and even synchronize files. AzCopy can even be configured to work with other cloud providers to help move files back and forth between clouds.

Azure Storage Explorer

Azure Storage Explorer is a standalone app that provides a graphical interface to manage files and blobs in your Azure Storage Account. It works on Windows, macOS, and Linux operating systems and uses AzCopy on the backend to perform all of the file and blob management tasks. With Storage Explorer, you can upload to Azure, download from Azure, or move between storage accounts.

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