Evolution Of Internet

It started from the year 1969, when the concept of internet was originated.

• The origin of Internet devised from the concept of Advanced Research Project Agency Network (ARPANET).
• ARPANET was developed by United States Department of Defence.
• Basic purpose of ARPANET was to provide communication among the various bodies of government.
• Initially, there were only four nodes, formally called Hosts.
• In 1972, the ARPANET spread over the globe with 23 nodes located at different countries and thus became known as Internet.  
• By the time, with invention of new technologies such as TCP/IP protocols, DNS, WWW, browsers, scripting languages, Internet provided a medium to publish and access information over the web.

Advantages

• Online communication with other people from any location.
• Search for any kind of information.
• It also serves as a medium of entertainment
• It allows us to use many services like:
  1.  Internet banking
  2.  Online shopping
  3.  Matrimonial services
  4.  Online ticket booking
  5.  Data sharing
  6.  Email

Disadvantages

• Chances of disclosure of personal information.
• Spamming, which corresponds to unwanted information in bulk.
• Virus attack.
• Misconception to many people due to certain unauthenticated information.