What is the definition of the Internet
Private، public and popular networks
In the mid-1970s، the emergence of research networks coincided with three other systems: the private networks provided by computer companies، the public networks built by national telecommunications companies، and the popular networks of individuals. Computer companies such as IBM introduced their own packet switching technology after the success of the interchanged packet technology in research networks، such as the Network Infrastructure System، Xerox Network Services، and others. Many companies used private networks، and they were more distributed، enabling access to data independently and centrally. Thus، it reflected the need for economic globalization that accelerated in the eighties and beyond، but it was not compatible with computers from competing companies، which led to an obstacle to building a national or international network، in addition to that it did not adhere to the applicable technical standards، so telecommunications companies announced National organizations in Europe، Canada and Japan have announced plans to build data networks that will be available to any user، regardless of the brand of computer used، to provide the public with an alternative. Public data networks provided the first access via the Internet to much of the world's population، and also provided new types of content and services that made them more relevant to non-technical users، as France Telecom introduced Minitel، a free terminal network that enables users to access a free online directory and a collection A variety of paid services، as well as providing a prototype for electronic commerce، which was the purchase of airline tickets، retail trade by mail، banking services and stock trading.
Low-cost public data networks used the same software and simple dial-up connections to exchange mail and other services between informal users. They were called popular networks، the most famous of which were the Usenet network using Unix protocols and the Bitnet network using IBM protocols. They do not have access to the formal networking infrastructure.
web design
Scientists and researchers wanted to connect the ARPANET network، so the DARPA system was developed، which uses two new networks to connect: Wireless radio communications and satellites، but he faced some problems، as the wireless connections were unreliable، and the satellites faced delays، in addition to the fact that the original Arbanet protocols were not suitable for such a diverse interconnected system، so he continued searching for a new technology for connection. Technical development prompted an increase in the use of local networks، which led to the invention of the Ethernet network، by Robert Metcalfe، who took advantage of an earlier network called Alohnet in the design، and Ethernet was based on a new technology called random access that allowed many users to share a communication channel without the need for routing procedures Complicated.
