add zh trans for content/en/docs/reference/glossary/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 地址块的符号，被广泛使用于各种网络配置中。
+
+aka:
+tags:
+- networking
+---
+CIDR (无类域间路由) 是一种描述 IP 地址块的符号，被广泛使用于各种网络配置中。
+
+<!-- 
+---
+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. 
+-->
+在 Kubernetes 的上下文中，每个 {{< glossary_tooltip text="节点" term_id="node" >}} 以 CIDR 形式（含起始地址和子网掩码）获得一个 IP 地址段，从而能够为每个 {{< glossary_tooltip text="Pod" term_id="pod" >}} 分配一个独一无二的 IP 地址。虽然其概念最初源自 IPv4，CIDR 已经被扩展为涵盖 IPv6。