Who are Cisco's most important rivals? The question is a bit tricky since you have to understand which group the interviewer comes from. Since Cisco competes on so many fronts, the rivals are almost everybody - Microsoft, IBM, Google, HP, Dell, VMWare, Alcatel-Lucent, etc. However you should focus on those which are most important to the interviewer. Bonus points will be given if you can actually explain why the firms you chose to talk about are more relevant competitors to this business unit than others.
