The status code of the response

Gets the error message including any informational output that was sent by the server. Sometimes the final response line doesn't contain anything informative as to what was going on with the server. Instead it may send information messages so in an effort to give as meaningful as a response as possible the informational messages will be included in the error.

Informational messages sent from the server

The message, if any, that the server sent with the response

General success or failure of the last command executed

The type of response received from the last command executed