PMP, PEM, M. Eng, M.PH., Efosa Brown, Amayo Ph.D., and David, Felix Letam. “Using Cisco Packet Tracer to Build Topologies, Perform VLSM Subnetting, and Configure OSPF Routing”. Engineering And Technology Journal, vol. 11, no. 08, Aug. 2026, pp. 11042-57, doi:10.47191/etj/v11i08.01.