Design and Security Assessment of a Smart Classroom Network Infrastructure for Enhanced Interactive Learning

Abstract

This study demonstrates the design, development, and performance evaluation of an enterprise-grade Smart Classroom network infrastructure that uses a Cisco Packet Tracer simulation as its primary validation platform. The proposed system is intended to enable a highly secure, fault-tolerant educational environment by combining Virtual Local Area Network (VLAN) segmentation, strict Access Control List (ACL) firewalls, and Hot Standby Router Protocol (HSRP) redundancy. By logically isolating broadcast domains, the system can securely separate high-volume student wireless traffic from administrative tools, Internet of Things (IoT) environmental controls, and physical security surveillance streams without bandwidth degradation. The system contains a centralized IoT Dashboard Server for remote environmental management, a Cisco 3560 Multilayer switch for Power over Ethernet (PoE) delivery to IP webcams, and dual Cisco 4331 routers for core network routing. A multi-layered security architecture and high-availability routing framework were used to enable precise traffic filtering, absolute denial of unauthorized endpoint access, and adaptive failover routing based on real-time hardware health monitoring. Network segmentation efficacy, firewall restriction policies, and gateway redundancy have been tested by experimental simulation under various packet routing and connection failure conditions. The results show a 100% denial rate for unauthorized inter-VLAN penetration and a sub-10-second failover recovery time during primary router disconnections, proving that the architecture has the capability to maintain secure, continuous operations for critical educational infrastructure effectively.