"Azure VNET Basics: Building Isolated Networks in the Cloud"

In Microsoft Azure, a VNET (Virtual Network) is a fundamental building block that allows you to create private, isolated networks in the cloud. VNETs enable you to securely connect Azure resources, such as virtual machines (VMs), to each other, the internet, and on-premises networks.
Key features and components of Azure VNET include:
Isolation: VNETs provide network isolation for resources within the same VNET and across different VNETs. This isolation helps control and secure communication between resources.
Subnets: You can divide a VNET into multiple subnets to organize and segment resources within the network. Each subnet can have its own security and routing configurations.
Address Space: When you create a VNET, you define the address space for it using private IP address ranges (IPv4). The address space is then divided into subnets based on your requirements.
Internet Connectivity: By default, resources within a VNET cannot access the internet. If internet access is required, you can configure a Network Address Translation (NAT) gateway or use a VM as a NAT device to enable outbound internet connectivity.
Peering: VNET peering allows you to connect two VNETs in the same region, allowing resources in those VNETs to communicate with each other as if they were on the same network.
VPN Gateway: Azure VNETs can be connected to on-premises networks using VPN (Virtual Private Network) gateways. This enables a hybrid network setup, allowing communication between resources in Azure and on-premises resources.
ExpressRoute: For higher bandwidth and more reliable connections, Azure VNETs can be connected to on-premises networks using Azure ExpressRoute. ExpressRoute provides a private, dedicated connection to Azure.
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