http://www.nytimes.com/2011/02/16/technology/16internet.html?hp The New York Times of 11.02.16, two days before Egypt's president Mubarak abdicated his 30 rule of Egypt, reported in simple non-technical terms how Mubarak's agents turned off Internet access to all of Egypt's citizens for several days. The key words to memorize are "Internet Router". Routers are small specialized computers that connect different parts of the Internet to other parts of the Internet. They make the Internet a network. In Egypt's case there were only a very few router computers that let Internet data and phone traffic pass into and out of Egypt. Flip the off switch on them... no more Internet for the Egyptians. And that can be done by a government agent or a malicious person in almost any country.