Communication method, network card and storage medium

The embodiment of the invention provides a communication method, a network card and a storage medium, and the method comprises the steps: determining a first message feature of a first message under the condition that the first message in a data stream is received; searching a label value matched with the first message feature from a preset message feature and label value corresponding table; if the first message is not found, identifying the first message and a second message by using a DPI module under the condition that the second message different from the first message in the data stream is received, so as to obtain a first service type of the data stream; adding a first label value corresponding to the first service type to the first message and the second message to obtain the first message added with the label value and the second message added with the label value; and updating a preset message feature and label value corresponding table according to the first message added with the label value and t