这表明实例一可以与实例二通信。

This shows that instance one can communicate with instance two.

youdao

在以这种方式使用时，尽管SSH仍然提供二元身份验证，但是SSH密钥不足以识别访问云实例的用户的身份。

However, while SSH still provides two-factor authentication, when used this way it is not sufficient to identify the individuals who are accessing the cloud instances.

youdao

当然，如果对于每个用户和每个实例使用不同的ssh密钥，Pageant只能为对每个实例的第二次和后续连接提供密钥，但这是实现更高的安全性要付出的代价。

Of course, if you use per-user and per-instance SSH keys, then Pageant can only provide the key for the second and subsequent connections to each instance - but that's the cost of tighter security.

youdao