如果包含主体数据库的服务器失败或连接中断，连接和事务状态将丢失。

If the server containing the principal database fails or connectivity is interrupted, connection and transaction state is lost.

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这是一个管理守护进程，负责管理主体数据库、主体数据库的密钥和策略配置。

This is an administrative daemon managing a database of principals, their secret keys, and policy configurations.

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从理论上将，它可提供三种服务：主体数据库维护、身份验证服务器(AS)和票据授予服务器(TGS)。

Logically it provides three services, principals database maintenance, authentication server (as), and ticket granting server (TGS). KDC runs two important daemons.

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