update zh-translation content/zh/docs/reference/glossary/cidr.md (#19443)

* cidr.md

* Update cidr.md

* Update cidr.md

content/zh/docs/reference/glossary/cidr.md

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+---
+title: CIDR
+id: cidr
+date: 2019-11-12
+full_link: 
+short_description: >
+  CIDR 是一种描述 IP 地址的符号，在各种网络配置中被大量使用。
+
+aka:
+tags:
+- networking
+---
+<!-- 
+---
+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. 
+-->
+CIDR (Classless Inter-Domain Routing) 是一种描述 IP 地址的符号，在各种网络配置中被大量使用。
+<!--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.  
+-->
+在 Kubernetes 中，每个 {{< glossary_tooltip text="节点" term_id="node" >}} 都通过使用 CIDR 的起始地址和子网掩码分配得到一个 IP 地址范围。这允许节点为每个 {{< glossary_tooltip text="Pod" term_id="pod" >}} 分配一个唯一的 IP 地址。虽然最初是 IPv4 的概念，同样 CIDR 也被扩展到 IPv6 中。