(The difficulty of the 408 exam is that the question types are very extensive and the question types are ever-changing. Only by laying a good foundation can we respond to all changes with the same. Students who take the computer examination can shift their focus to the above two subjects in the early stage; although there are many levels of computer network research, the focus can be on the data link layer and network layer. However, you must review it at the end when surfing the Internet, because there are many and complicated knowledge points on the Internet, and there are many points that need to be memorized. In addition, the test is too basic, and the score of the online test is the lowest.)
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