Yintoni Ethernet - okulungileyo of network online

Leyo ke Ethernet, oko kwazeka ngeminyaka kwinkulungwane XX. Sasungula olu hlobo LAN Robert Metcalfe, ngubani ukusebenza ngexesha Xerox Corporation. Kule 70 emva kwexesha 'Metcalfe wavula inkampani yakhe 3com, apho igqibe uphuhliso ubuchwepheshe obutsha. Ekuhambeni kwexesha kwafakwa iintlobo ezikhoyo ngoko kothungelwano zasekuhlaleni, yaye inkampani Metcalfe waba phambili kule nkalo.

Igama elithi «Ethernet» wenziwe amagama kaEtere (kaEtere) kunye net (network). Ngoku ndithi kuni ngakumbi, oko kukuthi Ethernet, yaye ziziphi iimpawu eziphambili olu hlobo womnatha. Olu hlobo lenethiwekhi yinkwenkwezi okanye isakhiwo yomgama kunye Velocity ka 10-100 megabits / yesibini. Ntlandlolo Ethernet yayisekelwe intambo ezinjalo, kodwa ngokuhamba kwexesha ubuchwepheshe itshintshile, waqala ukwakha uthungelwano esekelwe fibre-optic cable okanye ababini, ephothiweyo. Ngoku kukho malunga namashumi amathathu iintlobo lothungelwano Ethernet ukuba zahluke isantya, isimo, ubungakanani kunye nohlobo intambo. Ayizizo zonke iintlobo baye bafumana isicelo yorhwebo. Kwabo bafuna ukwazi ngokweenkcukacha oko Ethernet, siya uluhlu ezixhobo ethandwa.

Xerox Ethernet - technology ngokusekelwe yentambo yafakwa kunye izinga eliphezulu megabits 3 ngomzuzwana. Ukuguqulwa StarLan, oko kuqala kusetyenziswa isibini ezijijekileyo. Ngesantya udibaniso incinane - 1 megabit kuphela ngomzuzwana.

Ithekhnoloji 10BASE5 intambo yafakwa adlulisele data ngesantya 10 megabits / yesibini. Kanye ngesantya esifanayo kwaye StarLan10, kodwa ezinjalo intambo apha ithathelwe indawo isibini, ephothiweyo. Emva koko, lo bugcisa sele uhlobo 10BASE-T, apho kusetyenziswa khona izibini ezine, ephothiweyo.
Xa ukulungisa ecikizekileyo, ephothiweyo-isibini 100BASE-T isantya banda nekhulu megabits / yesibini. Olu hlobo iye yaphuhliswa ngakumbi. 100BASE-FX lokudlulisa phezu fibre optic cable kumgama ozikilometa eziyi-10 ngesantya omnye ezilikhulu megabits / yesibini. I 1000BASE-T isebenzisa izibini ezine vytye, yaye umgama uyalingana nekhulu eemitha. Xa ukuguqulwa kumgama 1000BASE-LH lanyuka ukuya kwi-100 km. ezimbini zokugqibela kufuneka isantya liphezulu, kukuwe 1000 megabits ngomzuzu.

Ethernet, olubandakanya zonke ezi iinguqulelo enxulumene noko umlawuli ekhethekileyo oludibeneyo ebhodini kwinkqubo le.

Ngoku makhe sibone ukuba yintoni iingenelo olu hlobo womnatha. Eyona nto basebenzisa ibalulekileyo - its ukufumaneka. Le khompyutha liqhagamshelene womnatha lonke ixesha, naphambi kokuba uye intanethi akukho mfuneko ukucofa up umnikezeli. Phezu Ethernet ukuba ungaphinda ngokuba umgca yaqeshwa, apho ibizwa bungaxhomekekanga modem. Enye inzuzo - ngesantya esiphezulu ovumela Ethernet protocol. Udayalo ibonelelwa twatsa, nokuba zooswingi ifayile okanye zithunyelwe. Ukongeza, omnye Ethernet-uqhagamshelwano kunokuba kuba sisiseko kwindawo womnatha yequmrhu okanye zasekuhlaleni apho zonke iikhompyutha ziya kufumaneka ofanayo unesantya esiphezulu.

Ukhuseleko namhlanje abantu Ethernet-network kwakhona ihlelwe kakuhle. Ngokuqhelekileyo, abanikezeli usondeze umsebenzisi yokwenene IP-iidilesi ukuqinisekisa Yokufihlakala computer kwi "World Wide Web." Kakade ke, kungekhona ingenelo mncinane uthungelwano enjalo Kulula kakhulu ukuba uxhulumane. Wena Awudingi i modem okanye naziphi na izixhobo ezikhethekileyo, nje ikhadi womnatha eyakhiwe phantse zonke motherboards. Oku kungenxa ekunyaniseni nokufikeleleka kunye nendleko eziphantsi kwe Ethernet-intanethi. Oku kubiza kakhulu ngaphantsi kwe kokuxhumana kwihlabathi liphela dial-up imodem.

Ngokuhamba kwexesha, olu hlobo womnatha kuya kuba lula ngakumbi. Kakade, kukho uguqulelo kancinane, ngokubonelela ngesantya malunga 10 gigabits / yesibini. Phakathi kwale minyaka ilishumi kulindeleke nobuchwepheshe output, nto leyo eza kunika isantya esilingana 1 terabit / yesibini. Ekubeni iimbono ezinjalo onomtsalane nganye uyakuqonda oko Ethernet, uya ufuna ukudibanisa kuloo kwinethiwekhi.