What is a campus network? Campus network is a computer network that provides resource sharing, information exchange and collaborative work for school teaching, scientific research and management under the guidance of certain educational ideas and theories. In China, the construction of campus network has developed rapidly in recent years. Up to now, nearly 6,000 schools across the country have built primary and secondary school campus networks. They provide a good example for primary and secondary schools in China to share educational resources, exchange information and work together. However, with the rapid increase of the number of campus networks in various parts of China, there is an increasing demand for how to realize the sharing of educational resources, information exchange and collaborative work between campus networks. ]