Description: The CIDR (Classless Inter-Domain Routing) block of a VPC (Virtual Private Cloud) refers to the range of IP addresses that can be used within the virtual private network. This block allows users to define a specific range of IP addresses that will be assigned to resources within the VPC, such as cloud instances, load balancers, and other services. The use of CIDR enables a more efficient allocation of IP addresses, as it allows the creation of subnets of varying sizes based on user needs. For example, a CIDR block can be /16, providing up to 65,536 IP addresses, or /24, which offers 256 addresses. This flexibility is crucial for cloud network management, as it allows organizations to effectively scale their resources and optimize IP address usage. Additionally, the CIDR block is fundamental for configuring connectivity and security within the VPC, as it allows the establishment of access and routing rules that are essential for the operation of cloud applications.
