Cloud Fundamentals
/Intermediate
Virtual Network (VPC / VNet)
Definition
A logically isolated section of the cloud where you can launch resources in a virtual network that you define. It grants absolute control over IP addressing, subnets, and security firewalls.
Explain Like I'm New
Building a private fence around your cloud servers. The internet cannot see anything inside the fence unless you specifically open a gate.
Real World Example
AWS VPC, Azure VNet, GCP VPC. A company puts their Web Server in a 'Public Subnet' (it has a gate to the internet). They put their Database in a 'Private Subnet' (no gate). The public can hit the web server, but hackers mathematically cannot route traffic to the database.
Common Use Cases
- •Security isolation
- •Corporate network bridges (VPNs)
- •Architectural foundations
Interview Questions
basic
- What does VPC stand for?
intermediate
- What is the difference between a Public Subnet and a Private Subnet?