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VPC IN AWS - Coggle Diagram
VPC IN AWS
What is VPC in AWS ?
Amazon Virtual Private Cloud (Amazon VPC) is a service that lets you launch AWS resources in a logically isolated virtual network that you define. You have complete control over your virtual networking environment, including selection of your own IP address range, creation of subnets, and configuration of route tables and network gateways. You can use both IPv4 and IPv6 for most resources in your virtual private cloud, helping to ensure secure and easy access to resources and applications
As one of AWS's foundational services, Amazon VPC makes it easy to customize your VPC's network configuration. You can create a public-facing subnet for your web servers that have access to the internet. It also lets you place your backend systems, such as databases or application servers, in a private-facing subnet with no internet access. Amazon VPC lets you to use multiple layers of security, including security groups and network access control lists, to help control access to Amazon EC2 instances in each subnet.
CIDR BLOCKS
Secondary CIDR Blocks
Similar to the primary CIDR block, secondary CIDR blocks are also supported by all the AWS services including Elastic Load Balancing and NAT Gateway.
- First, customers, who are launching more and more resources in their VPCs, can now scale up their VPCs on-demand.
- Second, customers no longer have to overallocate private IPv4 space to their VPCs -they can allocate only what is required at the time, and later expand it as needed.
IPV6 CIDR Blocks
IPv6 networks are written using CIDR notation and use the same CIDR technology as is employed by CIDR on IPv4.
Under CIDR, IPv6 unicast addresses can be aggregated with prefixes of arbitrary bit length, similar to IPv4 addresses
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