Chapter 4 · Implement and Manage Virtual Networking·v2.0.0·Updated 6/16/2026·~9 min
What's changed: Deepened AZ-104 Chapter 4 to Associate depth (tables, scenarios, FAQ, traps; localized figures)
4.1Virtual Networks (VNet) and Subnets
Key points
Understand the foundation of Azure networking: virtual networks (VNet) and address space, subnetting (public/private), and IP address basics.
A virtual network (VNet) is your private network on Azure. You set an address space (e.g., 10.0.0.0/16) and split it into subnets by purpose.
4.1.1VNet and subnets
- VNet: a private network on Azure with an address space (CIDR).
- Subnet: segments a VNet by purpose; commonly split into public (web tier) / private (DB tier).
- Resources (e.g., VMs) are placed in a subnet and receive a private IP.
Exam point
Common on AZ-104: VNet = private network, subnets separate public/private, DBs in a private subnet (no public IP). Resources within a VNet (same region) can communicate by default.
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