Design and Experimental Evaluation of an SDN-Based QoS Practice Model for Student Learning

Teaching Quality of Service (QoS) in networking courses is difficult when students practice only in conventional environments that make traffic differentiation and bottleneck behavior hard to observe. This study proposes an SDN-based QoS practice model implemented with Mininet and compares it with a conventional QoS practice model in a quasi-experimental design. A valid sample of 108 students was analyzed, including 54 students in the control group and 54 students in the experimental group. Learning outcomes were measured using a theory pre-test, a theory post-test, and a combined practice test. The pre-test showed no significant difference between the two groups, whereas the experimental group achieved significantly higher post-test and practical test scores after the intervention. These findings indicate that the proposed model can improve both conceptual understanding and hands-on performance in QoS learning.