Azure Subnets Explained in 5 Minutes | Build Secure Azure Networks

What is an Azure Subnet, and why is it one of the most important concepts in Azure networking? In this video, you'll learn how Azure Subnets help organize, isolate, and secure resources inside an Azure Virtual Network (VNet). Using simple real-world examples and diagrams, we explain why proper subnet design is essential for cloud security and scalability. In this video you'll learn: • What an Azure Subnet is • How Subnets work inside a VNet • Why subnet segmentation improves security • How Network Security Groups (NSGs) work with Subnets • CIDR sizing (/16 vs /24) explained simply • Why planning IP ranges matters • Azure services that require dedicated Subnets • The difference between a VNet and a Subnet Whether you're preparing for the AZ-104 exam, learning Azure from scratch, or building cloud infrastructure, this video will help you understand subnetting without unnecessary complexity. If you're enjoying this Azure Fundamentals series, subscribe for more practical cloud and cybersecurity content. ⏱️ Chapters 00:00 Why One Big Azure Network Is a Bad Idea 00:38 What Is an Azure Subnet? 00:49 VNet vs Subnet Explained 01:04 Why Subnets Matter 01:15 Security Without Subnets 01:25 How Subnets Stop Attackers 01:33 Real-World Azure Architecture 01:37 Designing an E-Commerce Network 01:55 Default Communication Between Subnets 02:09 Network Security Groups (NSGs) 02:16 NSGs Control the Doors 02:30 Essential Azure Subnet Rules 02:35 CIDR and IP Address Sizing 02:52 Why Planning Your Subnet Size Matters 03:09 Azure Services That Need Dedicated Subnets 03:27 Enterprise Network Design Example 03:42 Biggest Subnet Misconception 03:51 VNet vs Subnet: True Isolation Explained 04:09 Think of a VNet as a Country 04:26 Final Thoughts #Azure #AzureNetworking #AzureSubnets #AZ104 #MicrosoftAzure #CloudComputing #CloudNetworking #NetworkSecurity #NSG #VirtualNetwork #TechTutorial #AnalystMindset