CIDR

CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and routing Internet Protocol packets. It replaces the older classful network addressing scheme. CIDR uses variable-length subnet masking (VLSM) to create subnets of different sizes, offering greater flexibility in address allocation and reducing address wastage compared to the rigid class-based system. It's represented using an IP address followed by a slash and a number (e.g., 192.168.1.0/24), where the number indicates the number of bits used for the network prefix.

Visit the following resources to learn more:

• @article@What is CIDR?
• @video@What is Network CIDR Notation?