Post on 30-May-2018
transcript
8/14/2019 Internet - IT Project
1/22
Information TechnologyInformation Technology
Topic:
Internet
Group Members:
8/14/2019 Internet - IT Project
2/22
OverviewOverview
What is INTERNET ? Introduction
Evolution of the Internet
How Internet Works ? Internet & its New Mantra
Advantages & disadvantages
Conclusion
8/14/2019 Internet - IT Project
3/22
What is INTERNET ?What is INTERNET ?
The Internet is a global system of interconnectedcomputer networks. Acomputer that connects tothe Internet can access information from a vastnumber ofserves and other computers.
It is a hardware and software infrastructurethat provides connectivitybetween computers.
8/14/2019 Internet - IT Project
4/22
INTRODUCTIONINTRODUCTIONy Internet has andis revolutionizing our society, our
economy andour technological systems. Nooneknows for certainhowfar, or in what direction, theInternet will evolve.
y Internet has made this world a global village.
y TheInternet, as anintegrating force, has meldedthe technologyofcommunications andcomputingtoprovideinstant connectivity and globalinformation services to all its users at very lowcost.
8/14/2019 Internet - IT Project
5/22
INTRODUCTIONINTRODUCTIONy Estimated that about 60 millionhost computers.
y
By theendofthe year 2008, there willbe at least1.5billionInternet users.
y the total numbers ofhost computers andusershavebeen growing at about 33% every sixmonths
since 1988 or roughly 80% per year.
8/14/2019 Internet - IT Project
6/22
Evolution of the InternetEvolution of the Internety Moderncomputer networking technologies
emergedin theearly 1970s.
y In 1969, The U.S. Defense Advanced ResearchProjects Agency (variouslycalled ARPA andDARPA), an agency within the Department of
Defense, commissioned a wide-area computernetworkcalled the ARPANET.
8/14/2019 Internet - IT Project
7/22
At that time, theARPANET wasessentially theonlyrealistic wide-areacomputer network
inexistence. Theprogram
was led at DARPAby Larry Roberts.
Thepacketswitches werebuiltby Bolt Beranekand Newman
(BBN), a DARPAcontractor.
8/14/2019 Internet - IT Project
8/22
y Others directlyinvolvedin the ARPANET activityincluded the authors, Len Kleinrock, Frank Heart,
Howard Frank, Steve Crocker, Jon Postel andmanyothers in the ARPA researchcommunity.
y In theearly 1970s, ARPAbegan toexplore twoalternative applications ofpacket switching technology
basedon theuseofsynchronous satellites (SATNET)and ground-basedpacket radio (PRNET).
y The strategy that hadbeen adoptedfor SATNEToriginally was toembed the SATNET softwareinto anARPANETpacket switch, andinter work the twonetworks throughmemory-to-memory transfers withinthepacket switch.
Evolution of the InternetEvolution of the Internet
8/14/2019 Internet - IT Project
9/22
ARPA Research
Community
8/14/2019 Internet - IT Project
10/22
y TheTCP/IP protocol suite was developed andrefinedover a periodoffour more years and, in
1980
y It was adopted as a standardby the U.S.Department ofDefense.
y On January 1, 1983 the ARPANETconverted toTCP/IP as its standardhost protocol.
Evolution of the InternetEvolution of the Internet
8/14/2019 Internet - IT Project
11/22
y Gateways (or routers) wereused topass packets toandfromhost computers on local area networks.
Refinement andextensionoftheseprotocols andmanyothers associated with themcontinues to thisdayby wayoftheInternet Engineering Task Force.
Evolution of the InternetEvolution of the Internet
8/14/2019 Internet - IT Project
12/22
y Interconnecting computers is aninherentlydigitalproblem.
y Computers process andexchangedigitalinformation, meaning that theyuse a discretemathematical binary or two-valued languageof
1s and 0s.y For communicationpurposes, suchinformationis
mappedintocontinuous electrical or opticalwaveforms.
y Theuseofdigital signaling allows accurateregeneration and reliable recoveryoftheunderlyingbits.
How Internet Works ?How Internet Works ?
8/14/2019 Internet - IT Project
13/22
How Internet Works ?How Internet Works ?
8/14/2019 Internet - IT Project
14/22
y For digital communications, packet switching is abetterchoice,becauseit is farbetter suited to the typically
"burst" communication styleofcomputers.y Computers that communicate typically sendoutbrief
but intensebursts ofdata, and then remain silent for awhilebefore sending out thenext burst. Thesebursts
arecommunicated as packets, which are verymuch likeelectronicpostcards.
y Thepostcards, in realitypackets, are relayedfromcomputer tocomputer until they reach their
destination.y Together these routers and thecommunication links
between themform theunderpinnings oftheInternet.
How Internet Works ?How Internet Works ?
8/14/2019 Internet - IT Project
15/22
In this modern world ofours there is very less time
for every one and thesuccess and money alldepend on the time and itscommonly said TIME ISMONEY.
And the easiestway and nowadays practiceis to save time hope on toyour computer seat andjust logon andyouwill findany thing and every thinghere.
Internet & its New MantraInternet & its New Mantra
8/14/2019 Internet - IT Project
16/22
y Jobopportunities
y Consultancies
y Newmarkets
y Existing andnewproducts (buyers and suppliers)
y Marketing solutions
y Researchesy Cultures
y Art & crafts
y Entertainment (all sorts)
y Education
y Travels
y Stocks
Internet & its New MantraInternet & its New Mantra
8/14/2019 Internet - IT Project
17/22
y Communication: Theforemost target ofinternethas always been the
communication. By theadvent ofcomputers Internet,our earthhas reduced andhasattained theformofa global
village
.y Information:
Informationis probably thebiggest advantageinternet
is offering. TheInternet isa virtual treasure troveofinformation. Any kindofinformationon any topicis
availableon theInternet.
Advantages of InternetAdvantages of Internet
8/14/2019 Internet - IT Project
18/22
y Entertainment:Entertainment is anotherpopular reason whymany
peopleprefer to surftheInternet. Downloading games,Music, Movies, News andmorecanbefound and sharedon theInternet.
y Services: Many servicesarenowprovidedon theinternet such as onlinebanking, job seeking,
purchasing tickets for yourfavoritemovies, guidanceservices on arrayoftopicsengulfing theevery aspect of
life, andhotel reservations.
Advantages of InternetAdvantages of Internet
8/14/2019 Internet - IT Project
19/22
y Theft of Personal
information: IfyouusetheInternet, youmaybe
facing gravedanger as yourpersonal information such asname, address, credit cardnumber etc. canbe accessedbyother culprits tomake yourproblems worse.
y Spamming: Spamming
refers to sending unwantede-mails inbulk, whichprovide
nopurpose andneedlesslyobstruct theentire system.Suchillegal activities canbeveryfrustrating for you.
Disad
vantages of Internet
Disad
vantages of Internet
8/14/2019 Internet - IT Project
20/22
y Virus Threat: Virus isnothingbut a program whichdisrupts thenormal functioningofyour computer systems.
Computers attached tointernetaremoreprone to virus attacksand theycanendupintocrashing your wholeharddisk,causing youconsiderable
headache.y Pornography: This is
perhaps thebiggest threatrelated to your childrenshealthymental life. There are
thousands ofpornographic siteson theInternet that canbeeasilyfound andcanbe adetrimental factor to lettingchildrenuse theInternet.
Disad
vantages of Internet
Disad
vantages of Internet
8/14/2019 Internet - IT Project
21/22
Internet is The Future: In thenext ten years, theInternet is expected tobeenormouslybigger thanit is today.It will bemorepervasive than theolder technologies and
penetratemorehomes than television and radioprogramming. The success oftheInternet in society as awhole will depend less on technology thanon the largereconomic and social concerns that are at theheart ofeverymajor advance. TheInternet is noexception, except that its
potential and reach areperhaps as broad as any that havecomebefore. INTERNETISTHE FUTURE.
ConclusionConclusion
8/14/2019 Internet - IT Project
22/22
ConclusionConclusion