(With the continuous improvement of the degree of informatization in colleges and universities, the frequency of use and the degree of reliance on the network are also increasing. The school network has made more and more important contributions to the school's teaching, research and management. In order to dredge the network, when the network has shortcomings , How should you check and eliminate it? The author, through several years of office experience, briefly introduces the idea of ????checking the shortcomings of computer networks. Starting from the shortcomings, the computer network is summarized.)