If you are new to AWS, VPC (Virtual Private Cloud) is the first and most important networking concept to understand.
Every EC2, RDS, Load Balancer, or service you create in AWS lives inside a VPC.
Without understanding VPC, AWS networking feels confusing.
This blog explains AWS VPC step by step using a simple diagram, so beginners can clearly understand how traffic flows inside AWS.
What is AWS VPC?
An AWS Virtual Private Cloud (VPC) is a logically isolated network inside AWS where you can launch resources such as:
- EC2 instances
- Databases (RDS)
- Load Balancers
You control:
- IP address range (CIDR)
- Subnets
- Routing
- Security
- Think of a VPC as your own private data center inside AWS.
Why Do We Need a VPC?
We need a VPC to:
- Isolate our AWS resources from others
- Control inbound and outbound traffic
- Design secure architectures
- Decide which resources are public and which are private
Without a VPC, you cannot properly secure or control your cloud infrastructure.
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