Ihabhu lenethiwekhi. Isimiso sokusebenza

I-hub yenethiwekhi, eyaziwa nangokuthi ihabhu, isilawuli esixhuma amadivayisi amaningana e-Ethernet engxenyeni eyodwa yenethiwekhi. Amadivaysi axhunyiwe kwihabhu usebenzisa i-fiber optic noma ikhebula coaxial. Isetshenziselwa lokhu futhi Iqembu eliphikisiwe. Isimiso se-concentrator silula: sandisa wonke amaphakethe edatha angenayo futhi siwathumela kuwo wonke amachweba axhunyiwe kuwo.

I-concentrator yenethiwekhi, njengezinye izinhlobo ze-concentrators, inezici zayo ezifanele. Okokuqala, ukusebenza kanye nentengo yehabhu kuncike kwinani lamaports. Amadivayisi amaningi e-Ethernet axhunywe kuwo, aphezulu ukusebenza nokubiza kwehabhu. Ngokujwayelekile, ihabhu ifakwe nenani lezingxenyana, inamba yalo ehluka kusuka ku-4 kuya ku-24, kodwa ezinye izinhlobo zinemiphumela emihlanu. Inombolo yamapayipi inganyuswa ngokushayela ama-hubs amaningana. Ngenxa yalokhu kuxhumano, isixhumi esikhethekile sinikezwa kwihabhu ngalinye.

I-hub yenethiwekhi kanye nesici esisodwa esibaluleke kakhulu - ijubane lokukopisha nokudluliselwa kwamaphakethe wedatha. Amanye ama-hubs ayakwazi Shintsha ijubane layo ku-range ye-megabits eyishumi ngomzuzwana. Emadivaysi anjalo, kuguqulwa ngezindlela ezimbili: noma ngokuzenzekelayo, noma ngesandla, usebenzisa inkinobho. Kulokhu, isivinini esifakiwe sisebenza kuwo wonke amarekhodi asebenzayo. Qhathanisa phakathi kwama-hubs nohlobo lwezindaba zenethiwekhi. Njengomthetho, le nqubo iya kwikhebula le-fiber-optic noma ihlangothi eliphikisiwe, kodwa kunezingcingo ezisekela ezinye izinhlobo zemidiya. Futhi kukhona ama-hubs wezinhlobo ezixubene, isibonelo, ukusekela "hybrid" wezinhlangothi ezimbili ezipholile ngekhebula elihlanganisiwe.

Isimiso se-hubs asipheleli kakhulu. Iphakeji yedatha evela esiteshini esisodwa, ikhophi yenethiwekhi ukukopisha kuzo zonke ezinye iziteshi ezixhunyiwe, okunciphisa kakhulu ijubane le-Intanethi, ngoba wonke amadivaysi ewebhu axhuma kwinethiwekhi ngesiteshi esivamile. Uma amaphakethe amabili ekopishwa ngesikhathi esisodwa, ukushayisana kungenzeka, okungukuthi, ukushayisana kwezibonakaliso ezifanayo, lapho idatha ethile ilahlekile khona. Ezinye izinhlobo ze-hubs zivikelwe kusuka ekushayweni okuningi. Njengomthetho, zisekelwe ohlangothini oluthile. Uma kwenzeka ukwehluleka, lokhu kwenza kube lula ukuhlukanisa eyodwa Idivayisi, kuyilapho i-hub yenethiwekhi exhunywe ngekhebula le- coaxial ikhipha yonke ingxenye ngesikhathi esisodwa.

Isimiso sokusebenza sehabhu sithinta nokuphepha kwedatha. Uma ikhompyutha ingena kwinethiwekhi yendawo, amaphakethe wedatha wesistimu eyodwa afinyelela kuzo zonke ezinye izigcawu. Ngenxa yalokhu, zonke izilungiselelo zomuntu siqu zokuxhumana nomphakathi, amaphasiwedi amabhulogi, amaforamu kanye nedatha yangasese ingaziwa kuwo wonke amalungu alenethiwekhi. Ngenxa yalezi zizathu, i-hub ye-USB yenethiwekhi iqhutshwa phambili ngokushintshwa kwenethiwekhi noma ukushintsha. Le divayisi, eyithole isihloko esiphutha "se-smart hub", ihlukanisa amakheli we-MAC amakhompyutha angena kwinethiwekhi futhi ithumela idatha kuphela echwebeni lomsebenzisi elikhethiwe. Amaphakheji kuleli cala adlulisa ku-buffer, eqeda ukushayisana, ukulayishwa kwelayini nokuvuza kwedatha. Ngenxa yokuthembeka nentengo ephansi, ukushintshwa kusetshenziselwa ukusetshenziselwa izinhlelo zekhaya, kuyilapho ama-hubs aseduzane ekuthengisweni.