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Virtual Private Cloud (VPC) is a fundamental building block of the AWS cloud infrastructure. It allows you to create your own isolated virtual network in the AWS cloud.

As a senior engineer with a background in Java, JavaScript, Python, Node.js, and algorithms, you can think of a VPC as a virtual data center in the cloud. Just like how you have full control and customization over your on-premises data center, a VPC gives you complete control over the networking environment for your AWS resources.

Let's understand the components of a VPC:

  1. CIDR Block: When creating a VPC, you need to specify a Classless Inter-Domain Routing (CIDR) block, which determines the range of IP addresses that can be assigned to resources within the VPC.

  2. Subnets: Subnets are logical subdivisions of a VPC's IP address range. They allow you to divide your VPC into smaller networks, which can be spread across different Availability Zones for fault tolerance.

  3. Security Groups: Security Groups act as virtual firewalls for your AWS resources. They control inbound and outbound traffic at the instance level and provide fine-grained control over network access.

A VPC can have multiple _, each associated with a different subnet within the VPC.

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