KombiyuutaradaMacluumaadka tiknoolajiyadda

Sidee technology Ethernet Fast

Muddo dheer network desyatimegabitnaya waa jidka keliya in ay ku xidhmaan kombiyuutarada. Inkasta oo farsamadaan lahaa tiro ka mid ah muuqaalada (fur-terminators, isku dhaceen signal, tallaabadaas impedance la ruxruxo), kaasu waa kan ugu baahday. Qalabka ahaa rakibo raqiis - fudud, iyo xawaaraha 1.25 MB / s qof kasta suud. Si kastaba ha ahaatee, mugga xogta ka sii weyn sannad kasta lagu kala qaado, iyo shuruudaha hardware network adkeeyay. Sidaa darteed, in 90 sano si uu u bedelo go'aanka dhacsan in technology Ethernet Fast yimid. ayaa la tixgeliyey, shabakadaha "cudurada caruurta" 10-Mbit ka adkaaday horumarinta rabitaanka dadka isticmaala iyo soo saarayaasha.

Ethernet Fast. description

Waqtiga dhalashada ee 1992 la oran karo waa sanad technology ah. Waxay ahayd markaa in koox ka mid ah shirkadaha ku hawlan abuurka qalabka xiriirinta, oo ay ku jiraan 3Com, Injiillada kale iyo dhowr kale ku abuureen urur gaar ah oo si wadajir ah loo yaqaan "Fast Ethernet Alliance". hawlaha ay ka mid falanqaynta ee horumarinta warshadaha kala duwan, kuwaas oo loo adeegsan karo in la abuuro xal gudbinta xogta-xawaaraha sare. Waxaa intaa dheer, mabaadi'da formation iyo gudbinta baakidhka xogta waa in aanay noqon mid aad u kala duwan oo ka shabakadaha 10-megabit. Tani waxa ay ahayd lagama maarmaan si ay u ilaaliyaan waafaqsan yahay helitaanka CSMA / CD.

In isla sannaddaas IEEE Heerarka Ururka waxaa la aasaasay, oo shaqadoodu ahayd inaad wax ka barato ay bixiyaan shirkadaha ee 100-megabit xal u helaan. Sayidka bilaabay a shirkadaha iska hor imaad qarsoonayd iyo horumarka ay. sameeysa kasta wuxuu damcay inuu hubiyo in ay ahayd go'aankiisa la ansixiyay sida caadiga ah a.

Sidaas darteed, sida inta badan waa kiiska, dad badan lahaa in la gowraco by tanaasul. Tusaale ahaan, technology la soo jeediyay 100VG-AnyLAN ka HP iyo AT & T, oo dhaqan gelisa mabda'a cusub ee Mudnaanta helaan Baahida, la diiday sababtoo ah ma ahaa dib ugu-socon xal jira 10Base.

Natiijadan ayaa waxa ay shaqada ka ahaa aqoonsiga 1995 100-megabit xal caadiga ah Ethernet Fast, 802.3u magacaabista ah.

Features

Farqiga ugu muhiimsan ee u dhexeeya Ethernet Fast ka horreeyay - 10 Mbps Base-T - waxay ahayd is bedel hirgelinta jirka.

waafaqsan yahay xalka hore ka sokow, faa'iidooyinka ugu weyn ee technology waxa ay kala yihiin:

- kordhaya heerka xogta ilaa 12.5 Mbytes / s (isla 100 Mbps);

- isticmaalka helaan random,

- suurtagalnimada ee codsanaya xal caadiga ah, sababtoo ah shaqada sii raagayaan si ay u abuuraan network star-qaabeeya ah, waxaana loo isticmaali karaa kaari classical: Labada ciyaaryahan qaloocin iyo fiber.

Tan iyo qaabka Ethernet Fast shaqaalaha xirmooyin xogta weli la mid ah, waxaa suurtagal ah si loo gaaro gebi ahaanba waafaqid dib ugu. Sidaas daraaddeed, xitaa hadda, oo dhan xal network 100 Mbps iyo xataa 1 gigabit bixiyaan 10-Mbps mode (waxaa lagu hagaajin karo in ay ku qasbi in darawalka).

Si kastaba ha ahaatee, waxaa jira kala duwanaan. Tusaale ahaan, muddooyinka waqti gudbinta jir ayaa hoos u dhawaad 10 jeer (dhab ahaantii, waxaa suurtagal ah si loo gaaro sida xawaaraha sare).

Features qaybaha

Sida doorasho Ethernet ku, ha isticmaalin cable coaxial, 100 Mbps Ethernet Fast u baahan tahay la xidhiidha darfaheeda oo dhan laamihii qaata. Tani waxay noqon kartaa kaarka network kombiyuutarada, xarumaha iyo xarun (Hub). On line dhererka xaddidaadda waxaa ay ku soo rogeen ku xiran tahay nooca kaari. Sayidka, labada ciyaaryahan qaloocin category shanaad masaafo la ogolyahay waa 100 mitir, laakiin u ogolaanaya ka shaqeeya fiber 400 m (dabaq bar) ilaa 2 km.

Inkastoo tirada repeaters (repeater) waxaa sidoo kale ku koobnayn, waxa aanu looga hortago abuurka ah ee shabakadaha adag Bannaanka multi-dekedda by qalabka sida.

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