AWS VPC & VPC Components

CloudDeepDive
4 min readFeb 18, 2023
VPC Architecture

Day 05: AWS VPC & VPC Components

Amazon Web Services (AWS) is a cloud computing platform that provides a wide range of services to help businesses and individuals run their applications and store their data. AWS offers many benefits, including cost savings, scalability, and flexibility. One of the key services provided by AWS is the Virtual Private Cloud (VPC), which enables users to create a private network environment within the AWS cloud.

In this blog, we will explore VPC & VPC components and their roles in the network environment.

What is a VPC?

A Virtual Private Cloud (VPC) is a virtual network environment that users can create within the AWS cloud. The VPC provides an isolated section of the AWS cloud that users can use to launch their resources. VPC allows users to create a private network environment within the AWS Cloud, providing complete control over the network environment, including IP addresses, subnets, routing tables, and network gateways.

AWS VPC Benefits:

  1. Security: AWS VPC enables you to create your own isolated network environment, which provides an additional layer of security for your applications and data.
  2. Customization: You can customize your network environment by specifying the IP address range, subnets, routing tables, and network gateways.
  3. Scalability: With AWS VPC, you can easily scale your network as your business needs change.
  4. Cost Savings: By creating your own VPC, you can save money by avoiding the need to purchase and maintain hardware infrastructure.

VPC Components:

A VPC consists of several components that work together to create the network environment. The main components of a VPC include:

1.Subnets: Subnets are the range of IP addresses that are used for launching AWS resources within a VPC. A VPC can have one or more subnets, which can be public or private. Public subnets are exposed to the internet, while private subnets are not.

2. Route Tables: A route table contains a set of rules, known as routes, that are used to determine the path that network traffic takes within a VPC. A VPC can have one or more route tables, each associated with one or more subnets.

Route Table

3. Internet Gateway(IGW): An Internet Gateway (IGW) is a component that allows communication between resources in a VPC and the internet. An IGW is attached to a VPC and associated with a route table that routes traffic to the internet.

Internet Gateway(IGW)

4. Network Address Translation (NAT): Gateway A NAT Gateway is a component that allows resources within a private subnet to communicate with the internet. A NAT Gateway is used when you need to connect resources within a private subnet to the internet without exposing the resources to the public internet.

5. Security Groups: A security group is a set of rules that controls inbound and outbound network traffic for an EC2 instance, RDS instance, or other AWS resource. Security groups act as a virtual firewall, allowing or denying traffic based on the rules that you specify.

Security Group Logo

6. Network Access Control Lists (ACLs): Network Access Control Lists (ACLs) are a set of rules that filter traffic between subnets within a VPC. ACLs work at the subnet level and can be used to allow or deny traffic based on the rules that you specify.

7. Virtual Private Network (VPN): Connection A VPN connection allows you to connect your VPC to your on-premises network. A VPN connection uses encrypted tunnels to provide a secure connection between your VPC and your on-premises network.

Site to Site VPN

Conclusion: In conclusion, the Virtual Private Cloud (VPC) is a powerful tool that enables users to launch AWS resources in a virtual network that they have defined. VPC components, including subnets, route tables, Internet Gateway, NAT Gateway, security groups, Network Access Control Lists (ACLs), and Virtual Private Network (VPN) connections, work together to create a robust and secure network environment. By using VPC, users can customize their network environment, enhance security, and save money on infrastructure costs. AWS provides extensive documentation and resources to help users get started with VPC and to ensure that they can create a network environment that meets their business needs.

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Next article: Creating VPC & Components on AWS

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