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Internet

The document defines the Internet as an interconnected network of thousands of networks and millions of computers linking various institutions and individuals globally. It traces the evolution of the Internet from early experiments with packet switching networks in the 1950s-60s to the development of technologies like email, file transfer, and the domain name system in the 1970s-80s which helped connect academic and research networks internationally. The text highlights some key developments in the 1990s like the World Wide Web and banner ads and the rise of tools like Firefox, Twitter, and online elections in the 2000s which helped popularize the Internet.

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INTERNET
WHAT IS INTERNET ?  Internet is an interconnected network of thousands of networks and millions of computers Linking business,educational institutions,govertnment agencies and individuals OR Internet is a group of two or more networks that are :  Interconnected physically  Capable of communicating and sharing data with each other  Able to act together as a single network.
EVOLUTION OF INTERNET o 1957 – USSR launched the first artificial satellite, SPUTNIK o 1958 – USA dept of defence formed the Advanced Research Projects Agency (ARPA) . o 1967 – National Physical Laboratory (NPL) in england developed the NPL network – an experiment in packet switching . o 1970 – First cross country link installed between computers in USA.
 1971 - Ray Tomlinson invented email programme to send messages across a distributed network project i.e email.  1972 – improvements made to email-@ sign introduced.  1973 – first international connections to ARPANET from london via norway.  (FTP) introduced –method of transferring files between internet sites.  1974- telnet was introduced.  1975 – satellite links established across two oceans (to hawaii and UK)
 1981 – BITNET network between USA universities established.  1983 –European Academic and Research Network (EARN) established.  1984 – Domain name system introduced.  1991 – world wide web released – the protocol developed by Tim Berners Lee and others in europe was based on hypertext.  1994 – the first banner ads appeared.
 1995 – real video, and audio streaming technology , yahoo released as a hierarchical search engine.  2003 the first official swiss online election took place in anieses.  2004 First version of Mozilla firefox released.  2006 twitter created.
ADVANTAGES OF INTERNET  information on almost every subject is available.  Ability to do research from your home  Message boards where people can discuss ideas on any topic. Ability to get wide range of opinions . Peoples can find others that have a similar interest in what ever they are interested in.
 The internet provides the ability of emails.  Video conference.  Friendship connections are also been made over the internet.  News of all kinds is available almost instantaneously.
DISADVANTAGES OF INTERNET  There is a lot of wrong information on the internet.  There are a lot of unsrupulous business that have sprung up on the internet to take advantage of people.  Easy to waste a lot of time on the internet.  Network architecture limitations.  Wired internet.
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