_OVERVIEW OF INTERNET_

Internet

The Internet, sometimes called simply "the Net," is a worldwide system of computer networks - a network of networks in which users at any one computer can, if they have permission, get information from any other computer (and sometimes talk directly to users at other computers). It was conceived by the Advanced Research Projects Agency (ARPA) of the U.S. government in 1969 and was first known as the ARPANet. The original aim was to create a network that would allow users of a research computer at one university to "talk to" research computers at other universities. A side benefit of ARPANet's design was that, because messages could be routed or rerouted in more than one direction, the network could continue to function even if parts of it were destroyed in the event of a military attack or other disaster.

Advantages and disadvantages of Intranet, intranet and extranet

Disadvantages

• Security issues: There are securities issues in implementing the kinds ofnetworks in organization, your password and ID may be used illegally.
• Dependence on computer: The Dependency increases as we moves towards suchkind of paperless networking, people will start depending on computer which mayaffect negatively on the performance of the employees in way that they do nottake work as serious as they were taking before such network.
• Time: Time is needed for the training of the employees to use new tools ofnetwork.

Advantages

• Improve communications: This is one the reward of these two typesof networks that is improves the communication, because through thisnetwork the people within department, and also can easily communicateeven with outside departments which all are linked
.• Faster and fewer mistakes: These two networks increase the speedof every transaction to be complete and there are fewer chances ofmistakes to occur.
• Improves Customer Service: these two networks help organizations tobuild the strong relationship with the customers by quick responses totheir demands and queries.