When nc is executed with the command-line parameters -l -p -c, it waits until it receives a connection to that port, and then it executes the command.

在使用命令行参数- l - p - c执行nc时，nc将一直等待，直到在该端口上接收到连接，然后执行指定的命令。

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The last line reads the information from tap and sends it to nc -l -p 2301, which listens to TCP port 2301.

最后一行读取来自tap的信息，并将信息发送到nc - l - p 2301，它将侦听TCP端口2301。

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The nc -l -p 2300 command listens to TCP port 2300.

nc -l -p 2300 命令侦听 TCP 端口 2300。

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