Episode 31 — Virtual Networks (VNet) and Subnets
This episode focuses on Virtual Networks, known as VNets, which form the foundation of all networking within Azure. Learners discover how VNets allow Azure resources—such as virtual machines and applications—to securely communicate with each other, the internet, and on-premises networks. Each VNet is a logically isolated environment, and within it, subnets divide the address space into smaller, manageable segments. The episode explains why subnetting is vital for performance, organization, and security, aligning with AZ-900 objectives that assess understanding of network structure. Learners will also hear how IP address ranges, routing tables, and access control lists work together to direct and secure traffic efficiently within a VNet.
The discussion expands to show how subnets enable fine-grained control over network traffic. Practical examples include placing databases in private subnets for isolation or creating dedicated subnets for application layers to implement tiered architectures. The episode highlights how network security groups can be applied at the subnet or resource level to restrict traffic, demonstrating Azure’s layered security approach. By understanding how VNets and subnets interact, learners gain the ability to visualize network topologies and explain their design choices, both of which are crucial for exam readiness and real-world cloud deployment. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.
