Internet 2

  • June 2020
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INTERNE T

What is Internet? Internet is Network of Networks.

History of Internet • Developed by ARPA Net (Advanced Research Project Agency) in 1969 by US Department of Defense. • NSF Net came into existence. • Due to non-funding ARPA Net was shut down in 1990 and NSF Net discontinued in 1995.

Need of Internet  Communications

 Resource sharing  Reliability  Cost efficiency  Speedy Access to Information  Business from home

Communicating Via Internet H ow ’sthe w eather in Seattle, M ar?

kashaw @ cs.stanford.edu

N etw ork

m ar@ cs.w ashington.edu

M SNM essenger

Tools of Internet • Software • Hardware • Protocols • Communication Channel • WWW

Services provided by Internet •

E-mail



Chatting and Instant Messaging



Video- conferencing



Net Banking



Online Education



Online Employment

Services provided by Internet contd. •

Sending and Receiving greetings



Accessing Information



Downloading Software and various files



Getting Latest Market Information



Online Gaming



E – Commerce

WEB BROWSER 

A

Web

browser

is

a

application software that is used to view Web pages. 

Most of the browsers can

also be used to:  Send and receive emails 

Read

messages

from newsgroups



Web browsers “read”

the html text and convert it into a page. 

Currently there are two

popular GUI based Web browsers, the Netscape communicator and the Microsoft Internet Explorer. Others are Mosaic, Mozilla FireFox,

World Wide Web (WWW) World

Wide

Web

is

an

(www) Internet network

based of

Web

Servers. A

Web Server is a

host computer that provides

the

WWW Contd.

• Web Servers use Hypertext Transfer Protocol (HTTP) to respond to requests from Web clients. • Thus, WWW is a Universal Database of knowledge.

Internet Security Internet Security Tools : 

Firewalls



Encryption



Anti Virus



Password Security



Biometric Security

Future of Internet • Technology – ISDN will finally be used on a large scale – The ATM Promise • Media – Optic Fibre – Unshielded / Shielded twisted pairs

• Services

– WEB Browsers (mosaic, Netscape) are here to stay – Conferencing – Value added services ­ shopping, registration, reservations....... • Ongoing Efforts

– Internet access via cable TV networks – Remote Seminars – Adapting Internet services to the dialup user

Questions ?

Thanks

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