10. Which Cisco exec's departure in May signalled an end of an era?
The resignation of Jayshree Ullal, a 15-year Cisco veteran who left her role as senior vice president of Data Center, Switching and Services, signalled the changing of the old networking guard as Cisco morphs into an IT company. Some observers indicated that Ullal wasn't happy with Cisco's committee-driven CDO councils that risk lengthening the time to market for Cisco products. Her departure followed that of other high-profile senior execs, including Chief Development Officer Charlie Giancarlo and Senior Vice President Mike Volpi. Ullal is now CEO of data center switching firm Arista Networks.