Correct!

CIDR frees up additional IP address space on the Internet by allowing supernetting. Subnetting with CIDR allows, for example, networks larger than Class C (256 nodes) but smaller than Class B (65,536 nodes) to be allocated. Increased granularity minimizes waste. CIDR was not a part of the original Internet Protocol but was added during the 1990s. To make CIDR work, modifications to several popular routing protocols were required. CIDR has nothing to do with Network Address Translation (NAT), another technology that saves public IP address space by managing a mapping of multiple private IP addresses to one public one.

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