02 internet basics
TRANSCRIPT
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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
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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