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Bas ic Internet Concepts

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Agenda

Basic Concepts of InternetHistorical perspective & basics of Internet

How does the Internet work

Devices used to connect to the Internet

How doe Data Travel on the Internet

Internet product flavours

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Learning Objectives

At the end of this module, you would be able to :

Understand the basics of Internet

Understand its relationship with the Airtel

Bus iness Internet Product Portfolio

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Internet Defined

Internetworked networks

Government, Educational and Corporate, etc

A common infrastructure for :

Data Files, Messages, Audio, Video, etc

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Brief History of the Internet

1968 US agency DARPA (Defense Advanced Research

Projects Agency) contracts with BBN (Bolt, Beranek &

Newman) to create ARPAnet

1970 - First five nodes:

UCLA

S tanford

UC S anta Barbara

U of Utah, and

BBN 1974 - TCP specification by Vint Cerf

1984 On January 1, the Internet with its 1000 hosts

converts en masse to using TCP/IP for its messaging

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Internet Growth Trends

1977: 111 hosts on Internet

1981: 213 hosts

1983: 562 hosts

1984: 1,000 hosts

1986: 5,000 hosts

1987: 10,000 hos ts 1989: 100,000 hosts

1992: 1,000,000 hosts

2001: 150 175 million hosts

2002: over 200 million hosts By 2010, about 80% of the planet will be on the Internet

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How Does Data Travel

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Routing

It is a process

of sending data across many networks

over the Internet

by the most efficient Route

to remote networkswhen only the IP address of the destination network(s) is

known

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Gateway

A device that connects multiple computers to a

single cable or DS L line for Internet access.

Also referred to as "Internet gateway"

The device may also include an access point for

wireless transmission as well as DS L modem or

Router

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Default Gateway

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Internet Connectivity

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Domains divide World Wide Web sites into categories based on the nature o

their owner.They form part of a s ite's address, or uniform resource locator (URL).

S ome common top-level domains are:

.com for commercial enterprises

.org for non-profit organizations

.net for networks

.edu for educational institutions

.gov for government organizations

.mil for military services

.int for organizations established by international treaty

.biz commercial and personal

.info commercial and personal

.name for personal sites

In addition, every country linked to the Web has a two-letter top-level domain,

for example: in is India, .fr is France, .ie is Ireland

Domains What are they?

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Domain Names

Easy-to-remember aliases for IP addresses:

For example - 125.19.17.20 is airtel.in

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Ass igning & Tracking Domain Names & IP

Addresses

It is the responsibility of ICANN (Internet Corporation for

Assigned Names and Numbers) to assign & track domain

names & IP addresses

ICANN:

Administers the S hared Registration S ystem (SRS ) that registers domain names and IP addresses

Approves organizations called registrars to register domain names and IP addresses

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Popular uses of the Internet

receiving / sending emails

Googling

seeking jobs

instant mes saging / chatting

checking out on news / events

watching / playing / downloading music / games / movies

Buying things / trans ferring money

Connecting with people

Becoming visible through own webs ite / social N/W sites / blogs etc.

surviving

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In Conclus ion

At the end of this module you would have become

aware of :

How does data flow over the Internet

the devices used to connect to the Internet

S ome popular Applications of the Internet

http://www.thinkenergy.org/images/student_think.gif

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Key Takeaway

A understanding of the Internet will help you:

Engage the clients / prospective clients in an

interesting conversation & occupy their mind-

share and

Position the Airtel portfolio of Internet

Products appropriately in different customer

scenarios

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Thank You