> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/welcome/cn/bare-metal/overview/private-network/subnet.md).

# 子网

## **什么是子网？**

子网是您虚拟私有云中的 IP 地址范围。

子网可以加速您的虚拟网络，使其更高效地传输流量。通过创建子网，您可以保持组织的同时，通过减少网络的攻击面来增加额外的安全层。

您可以将资源启动到特定的子网中，以保护您的应用程序不受单个区域故障的影响。创建子网时，您需要指定子网的 IPv4 CIDR 地址块，它是 VPC CIDR 地址块的子集。


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