Word
CIDR
Definition
n. Stands for Classless Inter-Domain Routing. It is a way to write an IP address and its network mask together, like 192.168.1.0/24.
n. Abbreviation for Classless Inter-Domain Routing. A standard for IP address allocation and routing that uses variable-length subnet masking to improve address space efficiency.
Examples
“The network administrator assigned a new CIDR block to the office.”
“Using CIDR notation allows engineers to define a range of IP addresses with a single prefix and a slash.”
“The introduction of CIDR in 1993 was essential for slowing the exhaustion of IPv4 addresses and preventing the explosion of routing tables across the global internet backbone.”
Examples
simple
“The network administrator assigned a new CIDR block to the office.”
contextual
“Using CIDR notation allows engineers to define a range of IP addresses with a single prefix and a slash.”
complex
“The introduction of CIDR in 1993 was essential for slowing the exhaustion of IPv4 addresses and preventing the explosion of routing tables across the global internet backbone.”
Usage
Usually functions as a noun or an attributive noun modifying 'block', 'notation', or 'address'.
Teaching tip
This is a highly specialized term used by IT professionals and network engineers; most general English learners will never encounter it.
Etymology
An initialism for Classless Inter-Domain Routing, the term was coined in 1993 to denote a departure from the previous system of network classification.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Synonyms
Domain
Scan code
englishreference.com/q/cidr