Abstract: In the context of the lntermet of 'Things , the coexistence of multiple networks, including wiredwireless, and loT, has become the norm in colleges. The rapid advancement of digitalization in highereducation has aceelerated the swilt implementation of "multi-network convergence”. However, the chal.lenge lies in how to strategically plan and merge these networks to reduce operational and managementCosts.Moreover, ensuring network security by effectively controlling access across the entire networkpost-convergence has emerged as a new challenge. In light of these considerations, this paper introducesa “ multi-network convergence" solution to address these challenges. This approach is predicated on thenotion of self-operating networks, enabling controlled and manageable access for campus users. t em.ploys a single physical network to carry wired , wireless , and loT traffie while segmenting network addressranges based on business requirements. Flexible techniques such as multi-factor authentieation and intranet subdomain isolation are implemented to achieve minimal interconnectivity of permissions among di.verse users and services across the entire network, Taking Yangzhou Polytechnie Institute as a case stud-y, the proposed solution was practically implemented, successfully achieving the secure convergence ofmultiple networks on the campus while maintaining control over access permissions. The results of thispractical application demonstrate the effectiveness and universality of the proposed method.

Key words:  college;multi-network convergence, authentication, frewall