Exploring Internet
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PRESENTED BY:
mohnish.G

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Learning Outcomes
•Know the history of the Internet.
•Know how to access and connect to the Internet.
•Know the types of Web sites.
•Understand how Web pages use graphics, animation, audio, VR & plug-ins.
•Understand the different types of Internet services.
What is the Internet?
Collection of worldwide networks that connects millions of businesses,government
agencies, educational institutions, and individuals
Why do users access the Internet?
1. Communications
2. Information
3. Shopping
4. Banking and Investing
5. Entertainment
What are some services found on the Internet?
1. E-mail
2. Surfing the Web
3. File transfer
4. Chat
5. Instant messaging
How did the Internet originate?
ARPANET
•Networking project by US Department of Defense, Pentagon’s Advanced Research Projects Agency (ARPA)
•To allow scientists at different locations to share information
•The network is designed such that if part of network were destroyed, it will still be able to function. (for war purpose)
•Became functional September 1969
How has the Internet grown?
o 1969- Four host nodes
o 1984-More than 1,000 host nodes
o Today-More than 150 million host nodes
Who controls the Internet?
 No one—it is a public, cooperative, and independent network
 Several organizations set standards.
Connect to the Internet
 Slow-speed technology
Dial-up access - modem in your computer uses a standard telephone line to connect to the Internet
Slow but inexpensive
 High-speed technology (Board-band)
Cable modem via optical fiber,
ADSL - provide connections using regular copper telephone lines Fast but relatively more expensive than Dial-up access
Search engine
 A program hosted on a website used to find other Web sites by entering key words or phrases.
Types of Web sites
 Portal
 News
 Informational
 Business/Marketing
 Educational
 Entertainment
 Blog


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