一些常见的场景包括，只允许来自信任源的连接、阻止连接到服务器未提供的服务，以及只允许连接到特定服务。

Some common scenarios include allowing connections from trusted sources only, blocking connections to services that are not provided by the server, and allowing connections only to specific services.

youdao

它现在的功能早已不限于此了，但是我们现在仍然在用它来收集和操作来自许多不受信任的源的数据。

It has grown from this seed into much more, but the fact remains that we use it to gather and manipulate data from many untrusted sources.

youdao

我们有超过100个信息源，这就是为什么我们有这么多错误。如果你只有一个信息源可以信任，你就决不会产生怀疑。

We have over 100 metadata sources, and this is why we have so many errors: if you have only one source of truth, you never have any doubt.

youdao