请求消息中的控制帧是命令帧。

The control frame in a request message is the command frame.

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每个消息(即帧)以一个命令开头，以一个表示null字符的ASCII符号结束。

Each message, or frame, starts with a command and ends with the ASCII sign for a null character.

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要获取有关帧的进一步信息，如它的地址和程序语言，可以使用命令' info frame '。

To get further information about a frame such as its address and the program language you can use the command 'info frame'.

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