Part 1 of Essay
Once a small and simple collection of computers run by the Defence Department, is now a massive world wide network of computers, what we call the 'Internet'. The word "Internet" literally means "network of networks." In itself, the Internet is composed of thousands of smaller local networks scattered throughout the globe. ....

Part 2 of Essay
.... computers along the path switch each packet that will take it to its destination, but no two packets need to follow the same path. The Internet is designed so that packets always take the best available route at the time they are travelling. 'Routers' which are boxes of circuit boards and microchips, which do the essential task of directing and redirecting packets along the network. Much smaller boxes of circuit boards and microchips called 'modems' do the task of interpreting between the phone lines ....