VPC
Amazon VPC lets you build isolated virtual networks in AWS, including subnets, routing, internet access, and private communication patterns.
What it does
Virtual private cloud and network segmentation.
When to use
Use VPC when you need network segmentation, private subnets, routing control, and security boundaries in AWS.
Key Concepts
Subnets divide the network into public and private zones.
Route tables define how traffic moves through the VPC.
Internet Gateways provide public internet connectivity.
NAT Gateways allow private subnets to reach the internet outward.
Common Use Cases
Building secure cloud network architecture.
Separating application tiers.
Running private workloads with controlled internet access.
Interview Questions
What is a VPC?
What is the difference between public and private subnet?
Why is a NAT Gateway used?