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How networks work

Whatever a network may be, it would always require some form of connection between the two or more computers. This may include telephone lines, cellular phones, television cables, infra-red connections and fibre-obtic wires. For a network to work, or be called a network, it would have to provide a means of communication between two or more machines. In every such situation, a server is required. A server may be a huge giant supercomputer, or it may even be a normal workstation. Whichever the case, the computers connecting to the network (clients) would, when wanting to connect, contact the server. The server would then assign the client a temporary "address", similar to the address of a house or such. From then on, things would work like a postal service. When anyone wants to contact or communicate with that computer they simply look up its address from the server and then send their data to that address of the computer.

A day in the life of a computer on a LAN or Internet:

*Computer one is owned by JOHN
*Computer two is owned by PETER

(John turns on his computer)

Computer one contacts the server:
Username: JOHN
Password: *********

Server: Welcome! Your address Is 0.0.0.1

(Peter turns on his computer)

Computer two contacts the server:

Username: Peter
Password: ****

Server: Welcome. Your address Is 0.0.0.2

*Peter wants to contact John.

Computer two(peter): Find John
Server to computer two: John's address is 0.0.0.1

Computer two contacts computer one at 0.0.0.1, who establishes the connection.

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