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Author(s):

AMRITHA P | SURANYA DAS M S
Keywords:

Star Topology, NS2, Cisco Packet Tracer, Network Simulation, Latency, Throughput, Fault Tolerance.
Abstract:
The Star Topology Is A Fundamental Network Architecture Widely Adopted For Its Simplicity, Centralized Management, And Ease Of Troubleshooting. In This Paper, We Present A Comprehensive Simulation And Analysis Of The Star Topology Using NS2 (Network Simulator 2) And Cisco Packet Tracer To Evaluate Its Performance, Reliability, And Scalability In Modern Networks. The Implementation Involves Connecting Multiple Nodes (PCs, Servers) To A Central Hub Or Switch, Forming A Star-shaped Structure. Using NS2, We Analyze Critical Performance Metrics Such As Latency, Throughput, Packet Delivery Ratio (PDR), And Jitter Under Varying Traffic Loads. Additionally, Cisco Packet Tracer Is Employed To Model Real-world Scenarios, Including Link Failures, Congestion Control, And Dynamic Routing Protocols (e.g., RIP, OSPF), Providing A Hands-on Understanding Of Fault Tolerance And Network Recovery. Challenges Like Single Point Failure (hub Dependency) Are Also Examined, With Proposed Mitigation Strategies, Such As Redundant Hubs Or Hybrid Topologies. This Study Serves As A Practical Guide For Network Designers And Educators, Using NS2 For Quantitative Analysis And Packet Tracer For Visual Experimentation To Optimize Star-based Networks For Diverse Applications.