Cisco Digital Network Architecture

style'box-sizing: border-box; padding: 0px 0px 4px; margin: 0px; text-rendering: optimizelegibility; font-weight: 700; font-size: 18px; line-height: 24px; color: rgb(15, 17, 17); font-family: "Amazon Ember", Arial, sans-serif;'About the Authorclass"a-section a-spacing-small a-padding-small" style'box-sizing: border-box; margin-bottom: 0px; color: rgb(15, 17, 17); font-family: "Amazon Ember", Arial, sans-serif; padding: 6px 10px !important;'Tim Szigeti, CCIE No. 9794, is a principal technical marketing engineer within the Cisco Enterprise Networking Business (ENB) team. In this role, he collaborates with customers, the field, engineering, Cisco IT, and third-party technology partners to drive the development of industry-leading network analytics solutions. In his more than 20 years with Cisco, Tim has authored/co-authored five generations of Cisco QoS Design Guides, four Cisco Press books, an IETF standard (RFC 8325), and multiple patents. Additionally, Tim has been inducted into the Cisco Distinguished Speaker Hall of Fame Elite, representing the Top 1 percent of Cisco speakers of all time. Dave Zacks is a distinguished technical marketing engineer within the Cisco ENB team, focused on network architectures and fabrics, network hardware and ASIC design, switching, wireless, and the many and diverse technologies under the enterprise networking umbrella. Dave is based in Vancouver, Canada, and has been with Cisco for 19 years. Dr. Matthias Falkner is a distinguished technical marketing engineer within the Cisco ENB team. He currently focuses on the evolution of enterprise and service provider network architectures, and in particular on end-to-end architecture solutions involving virtualization. Matthias is currently helping to drive the Cisco automation strategy for enterprise networks (including DNA Center). Matthias also holds responsibilities in branch virtualization and in the definition of the cloud exchange architecture. Prior to his role within ENB, Matthias was the lead TME architect for the Cisco ASR 1000 Series routers. He has also held positions in product management, and served as a product line manager for the Cisco 10000 Series routers. From 2000 to 2005, Matthias was a consulting systems engineer in the Deutsche Telekom account team with Cisco Germany. Matthias holds a PhD in Systems and Computer engineering from Carleton University, Canada, and an MSc in Operations Research & Information Systems from the London School of Economics and Political Science, UK. His technical interests are in the area of performance characterization of virtualized networks, high availability, and service chaining. Simone Arena is a principal technical marketing engineer (TME) within the Cisco ENB team and is primarily focused on enterprise network architecture and on all things related to wireless and mobility. Simone is based in Italy and is a Cisco veteran, having joined Cisco in 1999. Throughout the years, Simone has covered multiple roles at Cisco, starting as a software engineer working with Catalyst switching platforms, to consulting system engineer in the field, to TME within different teams (Enterprise Solution Engineering, Wireless Business Unit, and now ENB).