The Effectiveness of Using Virtual Laboratories to Teach Computer Networking Skills in Zambia

The effectiveness of using virtual labs to train students in computer networking skills, when real equipment is limited or unavailable, is uncertain. The purpose of this study was to determine the effectiveness of using virtual labs to train students in the acquisition of computer network configuration and troubleshooting skills. The study was conducted in the developing country of Zambia, where there is an acute shortage of network lab equipment. Effectiveness was determined by the transfer of skills learned in a virtual lab to a real lab. A two stage true experimental design, that compared the proficiency of randomly assigned experimental (virtuallab) and control (no-virtual-lab) groups, was used to determine effectiveness (N = 56). In the first stage, the virtual-lab group practiced in a virtual lab while the no-virtual-lab group did not. Both groups were subjected to a lab test where the speed and accuracy of network configuration and troubleshooting of real equipment was measured, prior and after treatment. In the second stage, both groups practiced using real equipment and the speed and accuracy was again measured. An independent t-test was used to determine if there was a significant difference in the final performance between the two groups. It was found that there were significant differences between the groups in the configuration time (p = 0.011) and troubleshooting time (p = 0.03), favoring the virtual-lab group. On the other hand, there were no significant difference in configuration accuracy (p = 0.06) and troubleshooting accuracy (p = 0.440) between the two groups. In addition, there was positive transfer of training from the virtual lab to the real lab for configuration accuracy, configuration speed, troubleshooting accuracy and troubleshooting

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