What Is CIDR?

Classless Inter-Domain Routing — a method of allocating IP addresses and specifying subnet size using a slash notation (e.g., /24) instead of traditional class-based addressing.

CIDR across 2 exams

CIDR appears on the following exams. Each defines it in the context candidates are tested on:

CCST Networking
Classless Inter-Domain Routing — a method of allocating IP addresses and specifying subnet size using a slash notation (e.g., /24) instead of traditional class-based addressing.
Network+
Classless Inter-Domain Routing; a method of allocating IP addresses and specifying subnet masks using slash notation, such as /24.