"Tire" - ib tug network topology: zoo, cov disadvantages

Los nyob rau hauv ib tug ntau yam ntawm tuam txhab uas muag, nws yog tau kos xim rau lub fact tias lub network muaj undeveloped nyob rau hauv ntau txoj kev - tej zaum kuj siv lub "hnub qub" qhov chaw - "nplhaib", thiab qhov chaw - "log". Lub network topology yog heev uas tau pab los ntawm lub zoo thiab ceev cov ntaub ntawv pauv ntawm computers, tiam sis muaj ntau yog feem ntau unaware ntawm cov loj zoo thiab qhov tsis zoo ntawm txhua kev xaiv.

Yuav ua li cas yog nws?

Txawm tias muaj tseeb hais tias qhov kev xaiv no yog lub feem ntau niaj hnub no, lub sij hawm "topology" tsis tsuas yog muab cov technology "log". Lub network topology tsuas yog lub union ntawm ob peb computers nyob rau hauv ib tug network, ces nws yuav muab hu ua ib tug zoo li embodiment xws tswv yim raws li lub configuration los yog cov qauv ntawm lub network. Nyob rau hauv tas li ntawd, lub tswvyim ntawm "topology" xaus lus ib tug loj tus naj npawb ntawm cov kev cai uas txiav txim qhov kev tso kawm ntawm computers, cabling technology thiab cov txiag ntawm kev sib txuas lus khoom, raws li zoo raws li ib tug ntau ntawm lwm yam uas.

Yuav ua li cas yuav nws yuav?

Rau hnub tim, muaj peb lub ntsiab xaiv rau xws li ib tug merger ntawm computers - ib tug "lub hnub qub", "nplhaib" thiab "kev tsheb nqaj hlau". Lub topology nyob rau hauv txhua rooj plaub yog sib txawv los ntawm lwm tus thiab tseem muaj nws tus kheej cov yam ntxwv thiab zoo. Uas yog vim li cas nws yog ib qho tseem ceeb kom paub tias cov lus no ua ntej koj siv ib network ntawm computers rau ib tug kwv.

"Tire"

Raws li cov technology, "bus" topology muab rau kev siv ntawm ib tug tib cable, uas yog ua ke nrog txhua lwm yam tag nrho cov workstations yog siv.

Yog li, muaj ib zaug xwb cable yog siv los ntawm txhua qhov chaw nres tsheb nyob rau hauv lem thiab tag nrho cov lus xa mus rau cov chaw nres tsheb yuav tsum tau txais thiab mloog tej computer uas yog nyob rau hauv lub network. Los ntawm no flow tag nrho cov workstations xaiv tsuas yog cov lus uas hais tias tau Ameslikas hais rau lawv.

Yuav ua li cas yog qhov zoo?

Zoo topology "log" muaj raws li nram no:

• Qhov chaw yog tsis tshua muaj tej yam yooj yim rau tej hwj chim neeg siv.
• Lub system yog yooj yim heev rau nruab thiab nyob rau tib lub sij hawm ua lub kawg nyiaj txiag them nqi, yog tias tag nrho cov workstations nyob ib tug luv luv deb ntawm lawv.
• Yog hais tias so los yog pib mus rau unravel tej qho chaw nres tsheb rau lub network, tag nrho cov lwm leej lwm tus tseem ua hauj lwm raws li ua ntej tsis muaj teeb meem.

Yuav ua li cas yog cov tsis zoo?

Muaj kuj tsis zoo topology "log":

• Yog hais tias ib qho teeb meem tshwm sim nyob rau hauv tej qhov chaw, instantly lov tag nrho network kiag li.
• Heev yooj yim mus nrhiav tau tej yam teeb meem, yuav tsum tau lawv tshwm sim.
• Zoo nkauj pluag kev kawm piv rau lwm yam technologies. Qhov no yog vim hais tias cov topology ntawm network "log" envisages lub simultaneous kis tau tus mob ntawm cov ntaub ntawv los ntawm tsuas yog ib qho computer, thiab yog hais tias tus tib tus naj npawb ntawm kev ua hauj lwm noj tsub kom, kev kawm txo thaum uas tig mus rau lwm network.
• Tsis zoo heev scalability. Yuav kom ntxiv ib tug tshiab workstation, koj yuav tsum tau hloov khej twb nyob rau hauv kev siv "log tsheb".

Nws yog ib lub technology siv los txuas computers rau ib lub zos network siv coaxial cable. Nyob rau hauv cov ntaub ntawv no, raws li ib tug "log" siv feem ntawm coaxial cable, lub neej coj ntawm tsis ua hauj lwm siv T-connectors. "Tire" yog pw kiag li nyob rau hauv lub chav, thiab ces txuas mus rau txhua lub computer, thiab cov qhov tso zis sab connector yog tso rau hauv lub connector mounted rau lub network card.

Vim lub fact tias xws li cov khoom yog twb hopelessly tawm ntawm hnub tim, thiab ib tug ntau network topology "lub hnub qub", "bus" yog yuav luag yeej tsis siv, tab sis nws yog rau hnub no muaj peev xwm yuav nrhiav tau nyob rau hauv ntau yam qhauj.

"Lub Nplhaib"

"Nplhaib" nruab nrab yog ib tug topology ntawm lub zos network, raws li uas tag nrho cov ntau yam workstations ua ke ua ke nyob rau hauv series, txoj kev ua ib tug kiag li kaw voj voog. Nyob rau hauv xws li ib tug network, cov ntaub ntawv yog kis tau los ntawm ib tug ua hauj lwm qhov chaw nres tsheb mus rau lwm nyob rau hauv ib cov kev taw qhia, nyob rau txhua lub computer ua hauj lwm raws li ib tug repeater, ua retransmission lus rau cov tom ntej no, yog li txoj kev ua ib yam ntawm lub baton. Xws li ib tug system twb muaj me ntsis ua rau li cas yog lub topology ntawm "ntau lub tsheb npav", thiab yog li ntawd muaj ib tug ntau ntawm nws cov nta thiab cov kev pab.

Yuav ua li cas yog qhov zoo?

• Computers tsuas networked.
• Xyaum muaj yog tsis muaj yuav tsum tau siv ntxiv cov khoom.
• Nws yog ua tau mus cuag ruaj khov lag luam tsis muaj appreciable ntog ceev cov ntaub ntawv tshaj tawm hauv xov loj heev network load.
• Tej workstation yuav tsum tau siv kev koom nyob rau hauv cov ntaub ntawv kis tau tus mob tus txheej txheem, thiab yog hais tias tus so yog tsawg kawg yog ib lub computer los yog nyob rau hauv ib tug tej yam chaw yuav zom cov cable, tag nrho lawv yuav tsis tau hauj lwm kiag li.
• Yog hais tias koj yuav cuag ib tug tshiab workstation, lub network yuav tsum tig tawm ntawm ib tug tej lub sij hawm, vim hais tias nws yuav tsum tau qhib lub nplhaib thaum lub sij hawm lub installation ntawm tshiab cov khoom siv.
• Lub system yog theej nyuab configuration thiab tej chaw.
• Nyob rau hauv cov kev tshwm sim ntawm tej yam txhaum txawm mus rau cov kws txawj nws yog heev yooj yim mus nrhiav tau, li cas xyov yog qhov teeb meem.

Yuav ua li cas yog cov tsis zoo?

Nyob rau hauv kev twb kev txuas nrog cov negatives hnub no yog tsis yog li ntawd feem ntau pom muaj rau siv ib lub nplhaib topology, thiab feem ntau nws tshwm sim nyob rau hauv lub fiber-optic tes hauj lwm Token nplhaib txheem.

"Star"

Yog hais tias txhua workstation yog kev cob cog rua ncaj qha mus rau lub hauv paus unit, uas lub router los yog hloov tau ua no topology "lub hnub qub." "Bus" tau raug hloov dua lub sij hawm no xyov technology, txij li thaum nws muaj ib tug ntau dua kev ua tau zoo thiab ua hauj lwm zoo. Qhov no technology muab rau kev tswj ntawm tag nrho cov pob nyob rau hauv lub network tsiv ncaj qha mus rau lub hauv paus unit thiab txhua computer los ntawm nws tus kheej network card yog kev cob cog rua rau no mus kiag li nyias muaj nyias ib cable.

Yog hais tias tsim nyog, nws yuav muab tag nrho rau hauv ib tug ntau tes hauj lwm uas siv cov kev topology piav, uas tshwm sim yog ib tug network configuration muaj ib tsob ntoo topology. Tsob ntoo topology yog faib nyob rau hauv ib tug loj lub koom haum, tiam sis nws yog yus muaj los ntawm ib tug xov tooj ntawm nws cov nta thiab subtleties ntawm kev siv.

Topology "lub hnub qub" ntawm niaj hnub no yog siv raws li ib lub hauv paus rau qhov kev siv ntawm yuav luag tag nrho lub zos tes hauj lwm, thiab nyob rau hauv particular, no yog cov kev tshwm sim ntawm ib tug xov tooj ntawm qhov zoo ntawm no technology ntawm networking computers.

Yuav ua li cas yog qhov zoo?

• Yog hais tias koj ua txhaum tej yam chaw nres tsheb (los yog nws cov cable yog puas), kev ua hauj lwm nyob rau hauv Feem ntau, tag nrho cov network yog tsis cuam tshuam, uas yog, tag nrho cov so ntawm cov khoom tseem ua hauj lwm stably.
• Rau yav tom ntej scalability. Mus cuag ib tug tshiab workstation, koj cia li yuav tsum nteg ib tug nyias muaj nyias ib cable los ntawm tus tes hloov qhov.
• Cia li nrhiav tau, thiab ces troubleshoot los yog kev so nyob rau hauv lub network.
• Tsis tshua muaj neeg muaj kev kawm siab, tshwj xeeb tshaj yog thaum muab piv rau tib lub topology xaiv.
• Zoo meej yooj yim ntawm teeb thiab tswj ntawm tag nrho cov khoom.
• Lub network yuav ua tau yooj yim tsim ntxiv kiag li lawm.
• Yog hais tias lub hauv paus hloov lawm, tag nrho cov network yuav tsis ua hauj lwm.
• Yuav kom siv tau cov network kho vajtse, koj yuav tsum faib ib co nqi ntxiv, raws li nws yuav tsum tau lub purchase ntawm ib tug nyias muaj nyias ib ntaus ntawv, uas yuav txuas tag nrho cov computers kev cob cog rua rau lub network.
• Cov nab npawb ntawm cov workstations tag naj npawb ntawm cov ports siv nyob rau hauv lub central mus.

Yuav ua li cas yog cov tsis zoo?

Rau hnub tim, lub "hnub qub" yog feem ntau technology rau hnub no tus wired los yog wireless tes hauj lwm. Raws li ib qho piv txwv, ib lub hnub qub topology yuav sawv cev rau ib tug network siv ib tug cable xws li "cov khub", raws li zoo raws li ib tug mus, uas yog ib tug central ntaus ntawv. Nws yog ib cov tes hauj lwm yog feem ntau hnub no muaj peev xwm yuav nrhiav tau nyob rau hauv lub overwhelming feem ntau ntawm cov tuam txhab uas muag.

Topology thiab nws tseem ceeb

Lub network topology los mus txiav txim tsis tau tsuas yog lub cev qhov chaw nyob ntawm lub computers, tab sis, tseem ceeb tshaj mas, muab qhov xwm ntawm tus kev sib raug zoo ntawm lawv, raws li tau zoo raws li ntau yam yam ntxwv ntawm lub teeb liab hais tawm los ntawm lub network. Qhov ntawd yog qhov xwm ntawm kev sib txuas lus yuav txiav txim raws li qhov uas ib tug txhaum-thaiv network, thiab kawm yuav tsum tau complexity ntawm lub network khoom thiab feem ntau cov kev sib txuas lus tswj txoj kev, thiab ntau lwm yam tsis. Yog hais tias cov ntaub ntawv yog suav hais tias yog topology ntawm lub zos tes hauj lwm "bus" los yog lwm yam technologies uas tej zaum yuav muab plaub sib txawv kiag li lub tswv yim uas muaj feem rau ntau hom kev network architecture :

• Lub cev - computer kho thiab pw ntawm cables uniting lawv. Nyob rau hauv no txoj kev passive "lub hnub qub" tsis muaj kev sib txawv ntawm cov active, nyob rau hauv kev twb kev txuas nrog cov uas technology yog feem ntau xa mus rau cias li ib tug "lub hnub qub".
• Zajlus kom - qauv kev sib raug zoo, raws li zoo raws li lub sijhawm nyob rau hauv uas Pib ntsais koj teeb faib nyob rau hauv lub network. Qhov no txhais ntawm topology, tej zaum, yuav raug hu ua feem ntau lawm.
• Txauv tswj - lub hauv paus ntsiab lus, raws li tau zoo raws li ib theem zuj zus ntawm kev hloov ntawm txoj cai muaj cai network kev sib txuas ntawm cov kev computers.
• Cov ntaub ntawv - cov kev taw qhia uas txaus ntawm cov ntaub ntawv, uas yog kis tau los ntawm lub network.

Piv txwv li, lub network muaj lub cev thiab cov zajlus kom topology "log" hom tej zaum yuav siv tau raws li ib tug tswj relay kis tau tus mob network technology capture txoj cai, thiab muab simultaneous kis tau tus mob ntawm cov ntaub ntawv los ntawm ib tug kev siab computer. Thiab nws yog ib tug "lub hnub qub" technology nyob rau hauv xws cov ntsiab lus.