“…The book presents you with information applicable to the CCNA that can’t be found in any other CCNA text, including an overview and primer of MPLS, real-world examples, and real-world information on how to more effectively work with the Cisco TAC and diagnose software defects. The book also shows you how to use the Cisco ‘Debug’ command to learn how protocols work. …”

“…During his time at Cisco, Qiang has played an important role in a number of technology groups, including the Cisco TAC security and VPN team, where he was responsible for trouble-shooting complicated customer deployments in security and VPN solutions. …”

“…Prior to his current role, he was a technical leader within the World-Wide Security Practice and the Cisco Technical Assistance Center (TAC), where he taught, led, and mentored many engineers across the organization. …”