Principal由协议、域名以及端口三部分组成，在进程级别不同的组合之间互相隔离，它是整个系统的关键部分。
Key to system is the idea of a "principal", which in this case is the triple of protocol, domain-name, and port. Each combination is isolated from any other combination at the process level.
Principal由协议、域名以及端口三部分组成，在进程级别不同的组合之间互相隔离，它是整个系统的关键部分。
Key to system is the idea of a "principal", which in this case is the triple of protocol, domain-name, and port. Each combination is isolated from any other combination at the process level.
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