Edward Mazurek, CCIE No. 6448, has more than 40 years of experience in the computer networking industry. The first 18 were with IBM, supporting products such as Virtual Machine (VM) and VTAM. He has spent the last 22+ years with the Cisco TAC. As a principal engineer, he supports data center networking technologies, including storage-area networking, Fibre Channel, and FCoE in the MDS, UCS, and Nexus 5000, 6000, 7000, and 9000 series. He holds two CCIEs—SNA/IP Integration (2000) and Storage Area Networking (SAN)—and is presently a CCIE Emeritus. Ed has spearheaded the congestion-handling mechanisms on the Cisco MDS 9000 switches and Nexus 9000 switches. Based on his deep understanding, Ed developed an app that is being used by other Cisco engineers and continues to be in high demand by various partners. In addition to inventing multiple features on Cisco products, Ed holds multiple patents in the field of network congestion.