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 email in 1971 and the introduction of the domain name system and web browsers. The advantages listed include access to vast information, ability to research from home, message boards to connect with others, and near-instant news access. Disadvantages include potential for misinformation, scams, time wasted online, and some network limitations.

1. INTERNET

2. 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.

3. 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.

4.  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)

5.  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.

6.  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.

8. 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.

9.  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.

10. 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.

11. thank you