Patrick Gargano has been a Cisco Networking Academy Instructor since 2000, and a Certified Cisco Systems Instructor (CCSI) since 2005. He is currently working for Cisco as a Content Engineer on the Enterprise Technical Education team within DevCX. Until recently, he was based in Australia, where he worked as a Content Development Engineer at Skyline ATS, responsible for CCNP Enterprise course development with Learning@Cisco. He previously led the Networking Academy program at Collège La Cité in Ottawa, Canada, where he taught CCNA/CCNP-level courses, and he has also worked for Cisco Learning Partners NterOne and Fast Lane UK. In 2018 Patrick was awarded the Networking Academy Above and Beyond Instructor award for leading CCNA CyberOps early adoption and instructor training in Quebec, Canada. Patrick has also twice led the Cisco Networking Academy Dream Team at Cisco Live US. His previous Cisco Press publications include CCNP and CCIE Enterprise Core & CCNP Advanced Routing Portable Command Guide (2020), 31 Days Before Your CCNA Security Exam (2016), and CCNP Routing and Switching Portable Command Guide (2014). His certifications include CCNA, CyberOps Associate, and CCNP Enterprise, as well as the Enterprise Core and Enterprise Advanced Infrastructure Implementation specialists. He holds BEd and BA degrees from the University of Ottawa, and he is completing a master of professional studies (MPS) degree in computer networking at Fort Hays State University.