Authors - Prince Kelvin Owusu, Moses Aggor, Gibson Afriyie Owusu, Emmanuel Mensah Azagadli, Martins Larweh Neurtey, Suleman Zakaria, Cecil Selorm Mensah Abstract - Campus Area Networks play a central role in supporting teaching, learning, administration, research, e-learning platforms, institutional databases, and communication services in higher education institutions. However, as universities become increasingly dependent on digital infrastructure, weaknesses such as poor network segmentation, inconsistent access control, insecure wireless access, limited monitoring, and service disruptions can expose institutional systems to unauthorized access and operational risks. This paper examines security and resilience challenges in the existing Campus Area Network at Pentecost University, Ghana, and presents a redesigned architecture based on VLAN segmentation, access-control enforcement, hierarchical network organization, and improved monitoring. The study adopts a mixed-method and technical assessment approach involving stakeholder input, technical observation, network audit, and pre/post evaluation of selected security and performance indicators. The redesigned architecture separates critical network zones, restricts unauthorized inter-VLAN communication, reduces unnecessary broadcast exposure, and strengthens the control of access to sensitive institutional resources. The results indicate that the intervention was associated with improved access control, reduced security incidents, lower latency and packet loss, increased throughput, and faster detection and mitigation of network incidents. The paper contributes practical evidence on how structured segmentation and access-control mechanisms can strengthen secure, resilient, and sustainable ICT infrastructure in higher education environments
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