When multiple clients have the same printer configured, they generally do so through a service called a spooler. 当多个客户端都配置同一台打印机时,它们通常通过一个名为后台处理程序(spooler)的服务来完成配置。
Once the printer is unused, the spooler can send the job to the printer without fear of contention from other print jobs. 一旦打印机闲置,后台处理程序就可以将作业发送到打印机,而不必担心其他打印作业争用。