The main disadvantages, it highlights the need for substantial initial investment in equipment and facilities, the difficulty of reaching all students equally with new technologies and the effort required to upgrade the teaching staff. The key point that differentiates the new paradigm of the former is the use of computer networks, namely that it communication via computer is the heart of the system of distance learning, thereby creating a permanent vehicle for communication and have large masses of useful information for educational purposes, which may occur in any form: text, numeric, graphic, audiovisual motion, etc. The development of computer networks has been made possible by the development achieved by telecommunications, which responds in a satisfactory manner, both economically technology as the challenge of geographic dispersion. The bandwidth of transmission facilities necessary for channeling large amounts of data which involves a course, technology has increased over coaxial cable, twisted pair and fiber optics, among others. In addition, through the use of satellites is possible to cover geographic areas the size of one or more countries. The exchange of multimedia information in real time, which now allows local networks and the processing power of computers connected to them, is the basis for the development of more powerful means of interaction than those offered by teleconferencing technology. Although transmission of multimedia information in real time is primarily limited to local networks, since 1992 have been conducted and audio streams digital video over an area of the Internet with high speed connections known as MBONE (Multimedia Backbone). .