An illustrated guide to Amazon VPCs

a year ago

VPCs (Virtual Private Clouds) were invented to solve IP address conflicts and security issues in AWS.
Before VPCs, all AWS instances ran in a single shared network, leading to potential data exposure and IP conflicts.
IP address conflicts occur when multiple servers, especially on-prem and AWS, share the same IP address.
VPCs provide each customer with a private network within AWS, isolating their instances from others.
The mapping service in AWS ensures instances within a VPC can communicate securely without IP conflicts.
VPCs span availability zones within a region but do not cross regions.
Every AWS account comes with a default VPC, ensuring isolation and security by default.
Terraform can be used to create and manage VPCs, with code snippets provided for easy setup.

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