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TYPESOF COMPUTER NETWORKS

TYPESOF COMPUTER NETWORKS. ER.UPENDRA SHARMA. Whatis Network?. • A networkconsists of twoor more computers that are linked in order to share resources (such as printers andCDs), exchange files, orallow electroniccommunications. • Thecomputers on anetwork may be linked

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TYPESOF COMPUTER NETWORKS

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  1. TYPESOFCOMPUTER NETWORKS ER.UPENDRA SHARMA

  2. WhatisNetwork? •Anetworkconsistsoftwoormorecomputers thatarelinkedinordertoshareresources(such asprintersandCDs),exchangefiles,orallow electroniccommunications. •Thecomputersonanetworkmaybelinked throughcables,telephonelines,radiowaves, satellites,orinfraredlightbeams.

  3. DifferentTypesofNetworks •Dependinguponthegeographicalareacovered byanetwork,itisclassifiedas: –LocalAreaNetwork(LAN) –MetropolitanAreaNetwork(MAN) –WideAreaNetwork(WAN) –PersonalAreaNetwork(PAN)

  4. LocalAreaNetwork(LAN) •ALANisanetworkthatisusedforcommunicatingamong computerdevices,usuallywithinanofficebuildingorhome. •LAN’senablethesharingofresourcessuchasfilesor hardwaredevicesthatmaybeneededbymultipleusers • •Islimitedinsize,typicallyspanningafewhundredmeters, andnomorethanamile •Isfast,withspeedsfrom10Mbpsto10Gbps •Requireslittlewiring,typicallyasinglecableconnectingto eachdevice •HaslowercostcomparedtoMAN’sorWAN’s

  5. LocalAreaNetwork(LAN) •LAN’scanbeeitherwiredorwireless.Twistedpair, coaxorfibreopticcablecanbeusedinwiredLAN’s. •EveryLANusesaprotocol–asetofrulesthatgoverns howpacketsareconfiguredandtransmitted. •NodesinaLANarelinkedtogetherwithacertain topology.Thesetopologiesinclude: –Bus –Ring –Star •LANsarecapableofveryhightransmissionrates(100s Mb/stoGb/s).

  6. LocalAreaNetwork(LAN)

  7. AdvantagesofLAN •Speed •Cost •Security •E-mail •ResourceSharing

  8. DisadvantagesofLAN •ExpensiveToInstall •RequiresAdministrativeTime •FileServerMayFail •CablesMayBreak

  9. MetropolitanAreaNetwork(MAN) •Ametropolitanareanetwork(MAN)isalarge computernetworkthatusuallyspansacityora largecampus. •AMANisoptimizedforalargergeographical areathanaLAN,rangingfromseveralblocksof buildingstoentirecities. •AMANmightbeownedandoperatedbya singleorganization,butitusuallywillbeused bymanyindividualsandorganizations.

  10. MetropolitanAreaNetwork(MAN) •AMANoftenactsasahighspeednetworkto allowsharingofregionalresources. •AMANtypicallycoversanareaofbetween5 and50kmdiameter. •ExamplesofMAN:Telephonecompany networkthatprovidesahighspeedDSLto customersandcableTVnetwork.

  11. MetropolitanAreaNetwork(MAN)

  12. WideAreaNetwork(WAN) •WANcoversalargegeographicareasuchas country,continentorevenwholeoftheworld. •AWANistwoormoreLANsconnected together.TheLANscanbemanymilesapart. •Tocovergreatdistances,WANsmaytransmit dataoverleasedhigh-speedphonelinesor wirelesslinkssuchassatellites.

  13. WideAreaNetwork(WAN) •MultipleLANscanbeconnectedtogether usingdevicessuchasbridges,routers,or gateways,whichenablethemtosharedata. •Theworld'smostpopularWANistheInternet.

  14. WideAreaNetwork(WAN)

  15. PersonalAreaNetwork(PAN) •APANisanetworkthatisusedfor communicatingamongcomputersandcomputer devices(includingtelephones)inclose proximityofaroundafewmeterswithinaroom •Itcanbeusedforcommunicatingbetweenthe devicesthemselves,orforconnectingtoalarger networksuchastheinternet. •PAN’scanbewiredorwireless

  16. PersonalAreaNetwork(PAN) •Apersonalareanetwork(PAN)isacomputer networkusedforcommunicationamong computerdevices,includingtelephonesand personaldigitalassistants,inproximitytoan individual'sbody. •Thedevicesmayormaynotbelongtothe personinquestion.ThereachofaPANis typicallyafewmeters.

  17. PersonalAreaNetwork(PAN)

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