Deep in its architecture are computers known as domain name system (DNS) servers.

网络架构的底层是一种叫做域名系统（domain name system，DNS）服务器的计算机系统。

For this reason, this data is distributed across many DNS servers, which are authorities for different parts of the tree.

出于这个原因，这些数据分布在许多 DNS 服务器上，这些服务器是树的不同部分的权威。

When you type something like " youtube.com" into your web browser, it goes and asks a DNS server – usually one provided by your ISP – to lookup the address.

当您在网络浏览器中输入类似“ youtube.com”的内容时，它会要求DNS服务器（通常由ISP提供）查找地址。