In this post, we will discuss about the networking components in Microsoft Azure. Networking is a crucial aspect of any cloud solution, as it enables communication between resources and users. Azure offers a variety of networking services that can help you connect, protect, deliver, and monitor your applications in the cloud.
Azure networking services provide various networking capabilities that can be used together or separately. Some of the key services are:
- Virtual networks: Azure Virtual Network (VNet) is the fundamental building block for your private network in Azure. You can use VNets to communicate between Azure resources, connect to on-premises networks, and access the internet.
- Load balancers: Azure Load Balancer distributes network traffic among multiple servers or instances. You can use load balancers to improve the availability and performance of your applications.
- DNS: Azure DNS is a hosting service for DNS domains that provides name resolution using Microsoft Azure infrastructure. You can use Azure DNS to manage your DNS records and domains in Azure.
- Other networking services: Azure also offers other networking services that can enhance your network functionality and security, such as ExpressRoute, VPN Gateway, Virtual WAN, Private Link, Firewall, DDoS Protection, and more.
In this section, we will take a closer look at one of the most important networking services in Azure: Virtual Network (VNet). VNet is a logical isolation of the Azure cloud dedicated to your subscription. You can use VNet to:
- Communicate between Azure resources: You can deploy virtual machines, and several other types of Azure resources to a virtual network, such as Azure App Service Environments, the Azure Kubernetes Service (AKS), and Azure Virtual Machine Scale Sets. To view a complete list of Azure resources that you can deploy into a virtual network, see Virtual network service integration.
- Communicate between each other: You can connect virtual networks to each other, enabling resources in either virtual network to communicate with each other, using virtual network peering or Azure Virtual Network Manager. The virtual networks you connect can be in the same, or different, Azure regions. For more information, see Virtual network peering and Azure Virtual Network Manager.
- Communicate to the internet: All resources in a VNet can communicate outbound to the internet, by default. You can communicate inbound to a resource by assigning a public IP address or a public Load Balancer.
If you have a prior networking background, you might be wondering how Azure VNet compares to other networking concepts. Here are some points to consider:
- VNet is similar to a traditional network that you would operate in your own data center, but it brings some additional benefits of the cloud such as scale, availability, and isolation.
- VNet is based on the same IP addressing standards as the internet. You can use both IPv4 and IPv6 addresses in your VNet.
- VNet supports both stateful and stateless firewalls. You can use Network Security Groups (NSGs) to filter traffic by source and destination IP address, port, and protocol. You can also use Azure Firewall to apply more advanced rules and policies.
- VNet supports both static and dynamic routing. You can use user-defined routes (UDRs) to customize the routing behavior of your VNet. You can also use Route Server to enable dynamic routing between your VNet and your network virtual appliances (NVAs).
- VNet supports both private and public DNS zones. You can use private DNS zones to resolve names within your VNet or across peered VNets. You can also use public DNS zones to resolve names for your public-facing resources.
In this blog post, we have learned about the importance and role of networking in Azure. We have also explored some of the key networking services that Azure offers, especially Virtual Network (VNet).
Thank you for reading.