Design Lab | Code管理【资源加速设置】功能
爱用建站
DESIGN LAB
2020-02-28
Design Lab Code管理【资源加速设置】功能为用户提供自动化部署的Dns Prefetch功能，可起到资源加载加速的作用，推荐用户开启。
DNS原理
DNS(Domain Name System, 域名系统)，作为域名和IP地址相互映射的一个分布式数据库。当浏览器访问一个域名的时候，需要解析一次DNS，获得对应域名的ip地址。在解析过程中，按照浏览器缓存、系统缓存、路由器缓存、ISP(运营商)DNS缓存、根域名服务器、顶级域名服务器、主域名服务器的顺序，逐步读取缓存，直到拿到IP地址。
DNS Prefetch原理
DNS Prefetch就是根据浏览器定义的规则，提前解析之后可能会用到的域名，使解析结果缓存到系统缓存中，缩短DNS解析时间，来提高网站的访问速度。
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