Software-Defined Networking (SDN) for Enhanced Network Security

This study explores how Software-Defined Networking (SDN) can improve network security by using its centralized control and programmability. Traditional networks are often fixed and slow to respond to new cyber threats, but SDN separates the control part from the part that moves data, making networks easier to manage and protect in real time. The research involved questionnaires and interviews with IT experts at Bohol Northern Star College to understand current SDN security practices, challenges, and benefits. A system design was created that uses SDN with tools like firewalls, intrusion detection systems, and machine learning to detect and stop attacks faster. The results showed that SDN helps improve threat detection, policy enforcement, and network monitoring, making networks more secure and flexible. However, the study also found that SDN has risks such as vulnerabilities in its software and the need for careful controller setup to avoid new security problems. Overall, SDN offers a powerful way to enhance network security, especially in environments like cloud computing and IoT, if implemented with strong protections and multi-controller setups to increase resilience.