PMP, PEM, M. Eng, M.PH., E.B.A.P. and Letam, D.F. 2026. Using Cisco Packet Tracer to Build Topologies, Perform VLSM Subnetting, and Configure OSPF Routing. Engineering And Technology Journal. 11, 08 (Aug. 2026), 11042–11057. DOI:https://doi.org/10.47191/etj/v11i08.01.