Speaking part: 60 minutes discussion: Questions: 1. How many servers did James Pearn come up with at the end of his research? 2. Does Google say how many servers they have? 3. Why does Google keep it secret? 4. Which methods did he use to count the number of servers? 5. Did Google build and operate their centres from the very beginning? 6. When did they start to build their own centres? 7. How many centres did Google have until 12 January, 2012? 8. Where are these centres placed? 9. Were the locations of the data centres kept as a secret at first? What about now? 10. Why are they called 'mega data centres'? 11. Why are the public not allowed in Google data centres? 12. Why do Google employees have restricted access to these data centres? 13. What is the first method fo