About the Technical Reviewer

David Hanes, CCIE No. 3491, is a Principal Engineer in Cisco System’s Cloud Support Technical Assistance Center (TAC). Specializing in the Internet of Things (IoT) and Collaboration technologies, he assists in escalated customer issues and the incubation of new products and solutions. David has authored various industry publications in his areas of expertise, including the Cisco Press books IoT Fundamentals: Networking Technologies, Protocols, and Use Cases for the Internet of Things and Fax, Modem, and Text for IP Telephony. He has spoken at industry conferences around the world and is a Cisco Live Hall of Fame Speaker. He has worked on various standardization efforts, including leading and participating in working groups with the SIP Forum and authoring and contributing to RFCs in the IETF. David also has over a dozen patents issued and pending related to IoT, Collaboration, and other computer networking technologies. He holds a B.S. in Electrical Engineering from North Carolina State University.