Kai tsaye-ta
Za'a iya fahimtar maɓallan Ethernet kai tsaye azaman matrix na layi tare da layukan crisscross tsakanin tashar jiragen ruwa. Lokacin da aka gano fakitin bayanai a tashar shigar da bayanai, ana duba kan fakitin, ana samun adireshin wurin fakitin, ana fara tebur ɗin bincike mai ƙarfi na ciki, kuma ana canza tashar fitarwa daidai. An haɗa fakitin bayanan a mahadar shigarwa da fitarwa, kuma fakitin bayanan yana haɗa kai tsaye zuwa tashar da ta dace don gane aikin sauyawa. Domin ba ya buƙatar adanawa, jinkirin yana da ƙanƙanta kuma sauyawa yana da sauri, wanda shine fa'idarsa. Rashin hasara shine tunda abun cikin fakitin bayanan ba a ajiye shi ta hanyar hanyar Ethernet ba, ba shi yiwuwa a bincika ko fakitin bayanan da aka watsa ba daidai ba ne, kuma ba za a iya samar da damar gano kuskure ba. Saboda babu cache, shigarwar / fitarwa tashar jiragen ruwa na sauri daban-daban ba za a iya haɗa kai tsaye ba, kuma yana da sauƙi a rasa.
Ajiye da gaba
Yanayin ajiya da turawa yanayin aikace-aikace ne a fagen cibiyoyin sadarwar kwamfuta. Da farko tana adana fakitin bayanai na tashar shigar da bayanai, sannan ta yi rajistar CRC (tabbatar lambar sakewa ta cyclic), ta fitar da adireshin inda fakitin bayanan bayan sarrafa fakitin kuskure, sannan ta canza shi zuwa tashar fitarwa don aika fakitin ta hanyar. tebur bincike. Saboda haka, jinkirin adanawa da turawa a cikin sarrafa bayanai yana da yawa, wanda shine gazawarsa, amma yana iya yin kuskuren gano fakitin bayanan da ke shiga maɓalli kuma yana haɓaka aikin cibiyar sadarwa sosai. Musamman mahimmanci shi ne cewa zai iya tallafawa juyawa tsakanin tashoshin jiragen ruwa na sauri daban-daban da kuma kula da aikin haɗin gwiwa tsakanin manyan tashoshin jiragen ruwa da ƙananan tashar jiragen ruwa.
Warewa juzu'i
Wannan shine mafita tsakanin biyun farko. Yana bincika ko tsawon fakitin bayanan ya isa 64 bytes. Idan bai wuce 64 bytes ba, yana nufin fakitin karya ne kuma an zubar da fakitin; idan ya fi 64 bytes, ana aika fakitin. Wannan hanyar ba ta samar da tabbacin bayanai. Gudun sarrafa bayanan sa yana da sauri fiye da ajiya da aikawa, amma ya fi saurin wucewa kai tsaye. Gabatar da sauyawa na Hirschman sauya.
A lokaci guda, maɓalli na Hirschman na iya watsa bayanai tsakanin tashoshin jiragen ruwa da yawa. Ana iya ɗaukar kowane tashar jiragen ruwa a matsayin ɓangaren cibiyar sadarwar jiki mai zaman kanta (bayanin kula: ɓangaren cibiyar sadarwar IP ba), kuma na'urorin cibiyar sadarwar da aka haɗa da ita na iya jin daɗin duk bandwidth da kanta ba tare da yin gasa tare da wasu na'urori ba. Lokacin da kumburin A ya aika bayanai zuwa kumburin D, kumburin B na iya aika bayanai zuwa kumburin C a lokaci guda, kuma duka biyun suna da cikakken bandwidth na cibiyar sadarwa kuma suna da haɗin kai na kama-da-wane. Idan aka yi amfani da maɓalli na 10Mbps na Ethernet, jimlar zirga-zirgar canjin tana daidai da 2x10Mbps=20Mbps. Lokacin da aka yi amfani da 10Mbps shared HUB, jimlar zirga-zirgar HUB ba zai wuce 10Mbps ba.
A takaice, daHirschman canzana'ura ce ta hanyar sadarwa wacce za ta iya kammala aikin rufewa da tura firam ɗin bayanai bisa ga gano adireshin MAC. Maɓallin Hirschman na iya koyon adiresoshin MAC kuma ya adana su a cikin tebur na adireshi na ciki, kuma kai tsaye ya isa ga maƙasudi ta hanyar sauyawa na wucin gadi tsakanin mafarin da mai karɓar maƙasudin bayanan.
Lokacin aikawa: Dec-12-2024