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What’s AWS VPC? Amazon Virtual Private Cloud Explained | A Complete Guide with Best Practices

Last updated on 05th Nov 2022, Artciles, Blog

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Pramoot Prakash (AWS Cloud Architect )

Pramoot Prakash is an AWS Cloud Architect Senior Manager and has 8+ years of experience in controlling cloud-based information and cloud-Architect inside the process of making hardware and software recommendations, and handling audit logs, AWS Cloud trial.

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    • In this article you will learn:
    • 1.Introduction to Amazon’s Virtual Private Cloud.
    • 2.How VPCs work: virtual networking environments.
    • 3.Where VPCs live.
    • 4.Managing a VPCs.
    • 5.Elements of a VPC.
    • 6.Features of Amazon VPC.
    • 7.Conclusion.

Introduction to Amazon’s Virtual Private Cloud:

Amazon’s Virtual Private Cloud (VPC) is the foundational AWS service in both Compute and Network AWS classes. Existing foundational means that are other AWS services, such as an Elastic Compute Cloud (EC2) cannot be accessed without underlying a VPC network.Creating VPC is critical to operating in an AWS cloud. Let’s take a look at:

  • How VPCs work.
  • Where they live.
  • VPC management.
  • Elements of a VPC.
  • Shared responsibility.

How VPCs work: virtual networking environments:

Each VPC makes the separate virtual network environment in a AWS cloud, committed to a AWS account. Other AWS help and also services operate inside of a VPC networks to deliver cloud services.AWS VPC will look a normal to anyone employed in running the physical Data Center (DC). A VPC acts like standard TCP/IP network that can be developed and scaled as be required. However, DC features are employed to trade with like routers, switches VLANS etc. do not explicitly exist in VPC. They have been outlined and re-engineered into the cloud software.Employing VPC, can fast spin up a virtual network infrastructure that are AWS models can be launched into. Every VPC represents what AWS help market including:

  • IP addresses.
  • Subnets.
  • Routing.
  • Security.
  • Networking functionality.
Amazon’s Virtual Private Cloud

Where VPCs live:

All VPCs are made and exist in a one and only one AWS region. AWS regions are the geographic areas around the world where an Amazon clusters its cloud data centers. The benefit of a regionalization is that regional VPC delivers a network services arising from that a geographical area. If need to deliver closer access for a clients in another region can set up to another VPC in that area.Amazon makes a one default VPC for every account done with:

  • Default subnets.
  • Routing tables.
  • Security groups.
  • Network access control list.

Managing a VPCs:

A VPC administration is conducted through a AWS management interfaces:

  • AWS Management Console is a web interface for controlling the all AWS functions (image below).
  • AWS Command Line Interface (CLI) delivers a Windows, Linux, and Mac commands for more AWS services. AWS frequently delivers configuration education as a CLI commands.
  • AWS Software Development Kit (SDK) delivers a language-specific APIs for an AWS services including VPCs.
  • Query APIs. Low-level API actions can be provided through a HTTP or HTTPS demands.

Elements of a VPC:

The web-based on AWS management console shown above shows most of a VPC help to can make and manage. VPC network services include:

  • IPv4 and IPv6 address blocks.
  • Subnet creation.
  • Route tables.
  • Internet connectivity.
  • Elastic IP addresses (EIPs).
  • Network/subnet security.
  • Additional networking services.

IPv4 and IPv6 address blocks:

VPC IP address fields are represented using a Classless interdomain routing (CIDR) IPv4 and IPv6 blocks. And can add immediate and secondary CIDR blocks to the VPC if the secondary CIDR block arrives from a same speech range as a primary block.AWS suggests that specify a CIDR blocks from a private address ranges defined in RFC 1918,. AWS VPCs and Subnets page for a rules on which CIDR blocks can be an employed.

Subnet creation:

  • An Established EC2 instances run inside specified a VPC subnet (sometimes referred to as a launching an instance into a subnet).
  • For IP address every subnet’s CIDR is a subset of a VPC CIDR block. Each subnet separates its traffic from all the other VPC subnet traffic.
  • A subnet can only have a one CIDR block. And can set the other subnets to handle various kinds of traffic.
Features of AWS

Route tables:

Route tables have a rules (routes) that explain how network traffic is handled inside a VPC and subnets. VPC makes default route table called a main route table. Here have a two choices:

  • Modernize and use a main route table to control a network traffic.
  • Complete a route table to be an utilized for a personal subnet traffic.

Internet connectivity:

For an Internet access, every VPC configuration can host one Internet Gateway and supply a network address translation (NAT) services operating an Internet Gateway, NAT instances or a NAT gateway.

Elastic IP addresses (EIPs):

EIPs are the static public IPv4 addresses that are always given to an AWS account (EIP is not shown for an IPv6). EIPs are employed for a public Internet access to:

  • An instance.
  • An AWS elastic network interface (ENI).
  • An Other services need public IP address.

Network/subnet security:

  • VPCs use a security groups to deliver statefull protection (a state of connection session is held) for an instances. AWS explains a security groups as virtual firewalls.
  • VPCs also supply a network access control lists (NACLs) to stateless of VPC subnets that are, the state of connection is not sponsored.

Features of Amazon VPC:

  • IPV4 static addresses can be designated to user’s models which are currently in between the start and a stop.
  • An IPV6 CIDR union can be an optionally associated with user’s VPC.
  • An IPV6 address can be associated with a user’s instance.
  • Numerous IP addresses can be allocated to a user’s instance.
  • Network interfaces can be find and these (single or multiple interfaces) can be connected to user’s instance.
  • Security group membership of a user’s instance can be modified when it is running.
  • The outgoing traffic from a user’s model can be handled with a service of egress filtering, in addition to controlling an inbound traffic to the models (which is known as a ingress filtering).
  • The user’s models can be made to run on a single-tenant hardware.
  • An extra layer of the access control can be added to be instances in the form of a NACLs (network access control lists).


In this post comprehended Amazon VPC and how it can be used to an establish a AWS resources that are find by the user in a private network. AWS offers a number of efficient secure connectivity options to help get the most out of AWS when integrating a remote networks with an Amazon VPC.

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