VPC CIDR stands for Virtual Private Cloud Classless Inter-Domain Routing. It is an IP addressing scheme used to identify and allocate IP addresses to resources within a Virtual Private Cloud (VPC) on Amazon Web Services (AWS).
A VPC is a virtual network that you can create in AWS to launch your EC2 instances, RDS databases, and other resources. When you create a VPC, you must specify an IP address range in the form of a CIDR block. The CIDR block is a range of IP addresses in the format of x.x.x.x/y, where x.x.x.x is the network address and y is the number of bits used for the network prefix. For example, a CIDR block of 10.0.0.0/16 means that the VPC has 65,536 IP addresses available for use.
CIDR allows network administrators to allocate IP addresses more efficiently by dividing them into smaller subnets. This can help to reduce the amount of unused IP addresses and simplify network management.
