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