Yuav ua li cas yog cov network topology? Yog vim li cas lawv yuav tsum tau? Qhov uas lawv yuav siv thiab rau li cas? Yuav ua li cas yog lawv cov hom thiab hom yog muaj? Puas yuav ua tau rau ua cas neutralize lub kev tsis zoo ntawm network topologies thiab txhim khu lub zoo? Ntawm no yog ib tug luv luv daim ntawv teev cov lus nug uas yuav tau teb nyob rau hauv no tsab xov xwm.
lus qhia dav dav
Muaj coob tus neeg paub txog network pab kiag li lawm. Topology rau feem ntau - ib tug maub hav zoov. Yog li ntawd, cia xav txog tej yam ib tug me me qauv. Peb muaj cov computers uas khiav lag luam nyob rau hauv tib cheeb tsam network. Lawv muaj kev cob cog ntawm kev sib txuas lus kab. Nyob ntawm seb yuav ua li cas koj ua lawv cov kev sib tshuam, paub qhov txawv cov nram qab no ntawm tes hauj lwm:
- Nplhaib.
- Stellar.
- Tsheb npav.
- Xaab siab.
- Arbitrary.
Tag nrho cov saum toj no hais txog rau hauv lub cev topology. Tab sis muaj ntau ntau cov zajlus kom sawv daws yuav. Lawv yog cov neeg sab nraud ib tug los ntawm lwm yam. Yog li, nyob rau hauv thawj yuav siv rau ntawm lub ntsuas ntawm lub network. Ib tug zajlus kom topology cog lus qhia ntaub ntawv txaus sib txawv network ntshav thiab xaiv ib tug cov ntaub ntawv hloov lwm lub tsev txoj kev. Txhua lub hom sib tham hauv qab no rau constructing lub kev sib raug zoo muaj kev zoo thiab disadvantages. Tam sim no cia saib qhov yooj yim network topologies.
chaw tos tsheb loj hom
Nws yog siv nyob rau hauv tus neeg mob qhov twg cov ntaub ntawv no yog siv lineechny mono. Thaum nws xaus mounted terminators. Ces, txhua lub computer txuas rau lub multidrop kab los ntawm ib tug T-connector. Cov ntaub ntawv yog kis nyob rau ob sab thiab yuav thaws rov los los ntawm cov davhlau ya nyob terminators. Raws li yuav tsum to taub los no, cov ntaub ntawv nyob rau hauv cov ntaub ntawv no mus rau tag nrho cov ntshav. Tiam sis ntawm no nws yog muab tshem yuav tsuas yuav cov neeg uas yog npaj. Kis nruab nrab siv nyob rau hauv cov ntaub ntawv no rau tag nrho cov PCs uas muaj kev cob cog rau lub network. Ib tug teeb liab los ntawm ib tug tib PC, yog faib rau txhua tus kiag li lawm. Lub chaw ntawm no technology nrhiav siv Ethernet architecture. Yuav ua li cas yog qhov zoo uas peb muab no network khoom (network topology)? Yuav pib tau yooj yim ntawm teeb thiab network configuration. Tsis tas li ntawd, yog ib tug ntawm tsis, nws yuav mus txuas ntxiv nws ua hauj lwm raws li ib tug tag nrho. Vim hais tias ntawm no peb yuav hais tias cov network ua los ntawm cov chaw tos tsheb loj typology, muaj loj kuj mus malfunctions. Tab sis muaj drawbacks. Feem ntau nws yuav tsum tau muab sau tseg txwv txheeb ze ntev ntawm cable thiab tus naj npawb ntawm workstations. Nyob rau hauv tas li ntawd, cov kis ntawm cov linear Mono tej yam tsis zoo nyob rau hauv kev kawm ntawm lub network. Raws li ib tug tshwm sim, feem ntau nws yog ib qhov nyuaj los mus txiav txim qhov chaw ntawm lub defect, tshwj xeeb tshaj yog yog hais tias nws yog concealed rwb thaiv tsev.
Network topology "Star"
Nyob rau hauv cov ntaub ntawv no, txhua cov khub workstation yog kev cob cog rua rau lub hub los yog hub. Ua tsaug rau lawv yog muab los ntawm thaum uas tig mus kev twb kev txuas ntawm tag nrho cov tus kheej computers. Los ntawm txhais tau tias ntawm ib tug hub los yog concentrator PC thiab kev sib txuas lus nrog txhua lwm yam. Xa cov ntaub ntawv yog tau txais nyob rau tag nrho workstations. Tab sis lawv tsuas nqa tau ib tug uas lawv tau npaj. Nyob rau qhov zoo nws yog tsim nyog sau cia hais tias lub network yog ib qho yooj yim mus cuag ib tug tshiab PC. Tsis tas li ntawd, nws yog resistant rau faults ntawm ib tug neeg lub Cheebtsam thiab disconnections. Thiab tag nrho cov no ntxiv tau ntawm centralized tswj. Txawm li cas los, muaj tej yam tsis zoo. Yog li ntawd, muaj yog ib tug tseem ceeb ndlwg ntawm cable. Nyob rau hauv tas li ntawd, lub hub los yog hub tsis ua hauj lwm cuam tshuam lub lag luam ntawm tag nrho cov network.
Cov kev siv ntawm ib tug central hub
Qhov no network yog raws li nyob rau hauv lub typology ntawm yav tas los hauv daim ntawv ntawm cov creation ntawm lub network. Lub ntsiab lub luag hauj lwm nyob rau hauv cov ntaub ntawv no ua si ib tug central hub. Nws yog ib tug ntse ntaus ntawv uas muab ib tug serial kev twb kev txuas ntawm txawv noj rau lub "input-output", uas yog vim nws, txhua lub computer yog kev cob cog rua rau ob tug lwm workstations. Rau cov stability ntawm lub lag luam no yog cov thawj thiab backup rings. Qhov no tso cai rau koj los tswj cov kev kho mob ntawm lub network, txawm yog hais tias muaj yog tseem ceeb kev puas tsuaj. Txog cov teeb meem point tsuas muab tua. Rau cov ntaub ntawv hloov lwm lub tsev siv ib tug tshwj xeeb marker. Nws muaj lub chaw nyob ntawm lub sender thiab tau kev pab ntxiv. Nws yuav tsum tau muab sau tseg tias, nyob rau hauv tas li ntawd mus rau high cia siab rau, qhov no typology kuj muaj vaj huam sib luag rau tag nrho cov network workstations. Tab sis rau tag nrho nws yuav tau them. Nyob rau hauv cov ntaub ntawv no nws yog hais txog ib tug loj tau ntawm kim cable thiab xov kab.
ntoo
Qhov no network typology yog pom raws li ib tug ua ke ntawm ob peb hnub qub. Tsob ntoo yuav ua tau nyob rau hauv cov nram no hais tias:
- Active.
- Passive.
- Yeej muaj tseeb.
Nyob rau qhov yuav tsum tau xeev ntawm them nyiaj ntawm cov neeg ua hauj lwm picks tias koj xav siv: central computers los yog hubs (hubs). Txhua xaiv nws muaj nws qhov zoo thiab qhov tsis zoo. Nyob rau hauv thawj cov ntaub ntawv peb yuav tham txog lub tsev ib tug ntau centralized system nrog zoo tuav thiab cov zoo li. Tab sis txoj kev siv cov hubs, los yog hubs, yog feem ntau ntau npaum li cas txiaj ntsim nrog cov kev pab thiab nyiaj txiag kev pab them nqi.
nplhaib topology
Nyob rau hauv cov ntaub ntawv no, nws muab ib tug compound ntawm kev sib txuas lus raws nyob rau hauv ib unbroken saw. Txawm li cas los, nws tsis tas yuav tsum zoo li ib lub voj voog. Nyob rau hauv cov ntaub ntawv no nws muab hais tias cov ntaub ntawv yuav raug siv tawm ntawm tus kheej kev computer, uas yog kev cob cog rua rau lub tswv yim ntawm ib tug computer. Yog li ntawd, thaum cov ntaub ntawv yuav pib tsiv los ntawm ib tug kev taw tes nyob rau hauv lub kawg nws yuav tsum yog tib yam, muaj ib tug ncej puab. Cov ntaub ntawv nyob rau hauv cov rings yeej ib txwm tsiv nyob rau hauv tib txoj kev coj. Paub thiab cov txheej txheem rau tau txais lus no tsuas yog lub workstation uas nws twb nyob. Thaum lub topology siv ib tug marker saib. Nws muab rau hauv txoj cai siv lub nplhaib nyob rau hauv vim cov hoob kawm. Thaum lub sij hawm cov ntaub ntawv kis tau tus mob siv cov zajlus kom lub nplhaib. Tsim thiab customize no network yooj yim heev. Tab sis vim lub fact tias kev puas tsuaj nyob rau hauv ib qhov chaw muaj peev xwm coj nws mus, nyob rau hauv nws cov ntshiab daim ntawv no yog yuav luag yeej tsis siv vim hais tias ntawm nws cov unreliability. Mus ua hauj lwm nyob rau hauv kev xyaum yuav siv tau ntau yam kev hloov kho ntawm lub typology.
ob peb ua ke
Lawv yog siv los txo los yog tshem tawm cov kev tsis zoo thaum tsim kev sib raug zoo sib txawv computers. Feem ntau hom ua ke network topology ua rau lub hnub qub, lub nplhaib thiab tsheb npav technologies. Yuav kom to taub qhov teeb meem no, koj muaj peev xwm muab ib co piv txwv. Siv lub thawj lub hnub qub-chaw tos tsheb loj topology. Mas nws yog ib lub hub. Tab sis nws yuav ua tau kev cob cog rua tsis tau tsuas yog rau ib tug neeg computers tab sis tag nrho lub tsheb npav network feem. Ntawm cov hoob kawm, nws yuav tsis muaj ntaub ntawv ib hub, tiam sis muaj ntau. Nws kuj yuav siv tau nrog rau cov architecture ntawm tus kabmob (ntsiab) tsheb npav. Qhov kom zoo dua ntawm no thaum lawv tseem yog hais tias lub system administrator yuav coj kom zoo dua ntawm ob typologies thiab yooj yim los ntawm tus xov tooj ntawm computers uas yog kev cob cog rua rau lub network. Cia saib lwm cov piv txwv. Xam tias yog yuav tsum tau lub hnub qub-ntiv nplhaib topology. Nyob rau nws koom tsis computers, thiab hubs, uas yog kev cob cog rua ncaj qha thiab lub computer. Yog li, nws tsim ib tug kaw Circuit Court uas combines qhov zoo ntawm ob leeg cov topologies, thiab muaj tseem ib tug xov tooj ntawm amenities. Raws li ib qho piv txwv ntawm xws yuav ua nyob rau hauv lub fact tias tag nrho cov hubs yuav sau nyob rau hauv ib qho chaw. Qhov no txhais tau tias cov cable kev twb kev txuas taw tes yuav tau ua ke, thiab ua hauj lwm nrog lawv yuav tsum heev yooj yim zog.
xaus
Ntawm no yog peb nyob, thiab qhov yooj yim hom network topology. Xa nyob rau hauv tsab xov xwm tau tsim tau ib tug kev sib raug zoo ntawm cov sib txawv computers yog cov feem ntau nrov vim nws practicality. Tab sis nyob rau hauv tej rooj plaub tej zaum koj yuav xav tau ntau tshwj xeeb network topologies. Lawv txoj kev loj hlob thiab kev siv cov twb muaj lawm twb technologies yog nqa tawm nrog tag nrho cov tsim nyog nta mus ua hauj lwm, lub nuances thiab sib nrauj. Feem ntau ib yam dab tsi zoo li qhov no yog siv tsuas yog rau cov kev thiab cov tub rog cov vaj tse, thaum rau pej xeem lub neej yog ntau tshaj li txaus, thiab feem ntau le caag. Tom qab tag nrho, xam cov network topology - ib tug xyoo lawm tsim!