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add cidr to glossary (#17550)

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* add CIDR

* modify cidr definition

* Update content/en/docs/reference/glossary/cidr.md

Co-Authored-By: Chris <6834943+christophercarney@users.noreply.github.com>

* Update content/en/docs/reference/glossary/cidr.md

Co-Authored-By: Chris <6834943+christophercarney@users.noreply.github.com>
This commit is contained in:
mhamdi semah
2019-12-03 15:16:57 +01:00
committed by Kubernetes Prow Robot
parent 832371281d
commit bf92b9febd
1 changed files with 18 additions and 0 deletions
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content/en/docs/reference/glossary/cidr.md
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---
title: CIDR
id: cidr
date: 2019-11-12
full_link:
short_description: >
CIDR is a notation for describing blocks of IP addresses and is used heavily in various networking configurations.
aka:
tags:
- networking
---
CIDR (Classless Inter-Domain Routing) is a notation for describing blocks of IP addresses and is used heavily in various networking configurations.
<!--more-->
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.