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website/content/en/docs/reference/glossary/cidr.md

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title id date full_link short_description aka tags
CIDR cidr 2019-11-12 CIDR is a notation for describing blocks of IP addresses and is used heavily in various networking configurations.
networking

CIDR (Classless Inter-Domain Routing) is a notation for describing blocks of IP addresses and is used heavily in various networking configurations.

In the context of Kubernetes, each {{< glossary_tooltip text="Node" term_id="node" >}} is assigned a range of IP addresses through the start address and a subnet mask using CIDR. This allows Nodes to assign each {{< glossary_tooltip text="Pod" term_id="pod" >}} a unique IP address. Although originally a concept for IPv4, CIDR has also been expanded to include IPv6.