Abstract

The Internet is a physically connected network of computers of different type and capacity located at some distance from each other. The physical connection between the computers is maintained by electronic hardware, a number of sophisticated computer programs with cryptic names and millions of miles of cables. The large capacity computers are usually networked 24-hours a day, while the smaller ones are linked to the net only when their users wish to communicate. Therefore PC users entering the net usually first build up a connection to a high capacity computer and utilize the latter’s 24-hour technical services; thus these computers are called “servers.”