云主机
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云主机将网站或应用分布在一个或多个数据中心（AWS、Google Cloud、Azure等）的虚拟化服务器池中，实现计算和存储的按需扩展。云主机的域名配置通常是将[[dns-hosting|DNS]]指向负载均衡器IP地址或[[cdn|CDN]]边缘主机名，而非单一源服务器。由于随着基础设施扩展IP地址可能发生变化，建议使用CNAME记录或弹性IP，而非硬编码A记录。许多云提供商还通过ACM（AWS）或托管证书服务提供托管[[ssl-tls|SSL证书]]，简化HTTPS设置。
示例
An e-commerce site on AWS points its apex domain example.com to an Application Load Balancer via an ALIAS record, and uses CloudFront (CDN) as a CNAME target for www.example.com, enabling global distribution and auto-scaling.