Hotuna na Token Ring ne LAN Technology
Cibiyar IBM ta bunkasa a shekarun 1980s a matsayin madadin Ethernet , Token Ring yana da hanyar sadarwa ta hanyar sadarwa don yankuna na gida (LANs) inda aka haɗa na'urori a cikin tauraron ko kuma zane-zane. Yana aiki a Layer 2 na samfurin OSI .
Tun daga shekarun 1990s, Token Ring ya ragu sosai a cikin shahararrun kuma an cire shi daga cikin kasuwancin kasuwanci kamar yadda fasahar Ethernet ya fara mamaye kayan LAN.
Standard Token Ring yana tallafawa har zuwa 16 Mbps . A cikin shekarun 1990s, wani shiri na masana'antu mai suna High Speed Token Ring (HSTR) ya ci gaba da inganta fasahar fasahar fasaha don mika Mintin Ringen zuwa 100 Mbps don yin gasa tare da Ethernet, amma rashin amfani a kasuwa ya kasance don kayayyakin HSTR kuma an watsar da fasaha.
Ta yaya Wuta Kunna Wuta
Ba kamar sauran siffofin LAN ba, Token Ring yana riƙe da ɗayan shafukan yanar gizo guda ɗaya ko fiye da ke gudana ta hanyar sadarwa.
Wadannan sassan suna raba su ta duk na'urorin da aka haɗa akan cibiyar sadarwar kamar haka:
- Filaye ( fakiti ) ya isa a cikin na'ura mai zuwa a cikin jerin zobe.
- Wannan na'urar yana duba ko ƙila yana ƙunshe da saƙon da aka yi magana da ita. Idan haka ne, na'urar ta cire sakon daga firam. In bahaka ba, filayen ya bace (an kira alama alama ).
- Na'urar da ke riƙe da ƙira ya yanke shawarar ko aika sako. Idan haka ne, yana sanya saƙo na saƙo zuwa cikin alama alama kuma tana mayar da shi a kan LAN. Idan ba haka ba, na'urar zata sake barin alama alama don na'ura mai zuwa a jerin don karɓar.
A wasu kalmomi, a ƙoƙari don rage ƙwayar cibiyar sadarwa, ana amfani da na'urar daya kawai a lokaci ɗaya. Matakan da ke sama suna maimaitawa akai don dukkan na'urori a cikin zobe alama.
Alamai suna da adadin uku waɗanda suka haɗa da ƙarancin farko da ƙarshe wanda ke kwatanta farkon da ƙarshen firam (watau suna nuna iyakokin frame). Har ila yau, a cikin alamar ita ce hanyar sarrafawa ta hanyar shiga. Tsawon iyakar tsawon rabon bayanan da aka samu shine 4500 bytes.
Ta yaya Fitar Ring ta kwatanta zuwa Ethernet?
Ba kamar hanyar sadarwa Ethernet ba, na'urori a cikin cibiyar sadarwa na Token Ring suna da daidai wannan adireshin MAC ba tare da haddasa al'amurra ba.
Ga wasu bambance-bambance:
- Cabling for Token Ring yanar gizo ya fi tsada fiye da Ethernet ta CAT 3 / 5e. Har ila yau, karin farashi sune tashoshin sadarwa na Token Ring da kuma tashar jiragen ruwa.
- Za a iya daidaita hanyoyin sadarwar Token Ring inda wasu nodes zasu iya samun fifiko fiye da wasu, wani abu wanda ba a yarda da Ethernet maras tabbas ba.
- Kamar yadda aka ambata a sama, tashoshin Token Ring suna amfani da alamu don kauce wa haɗari, yayin da cibiyoyin Ethernet (musamman idan ana amfani da su) sun fi dacewa da su. Wannan shi ne dalilin da ya sa cibiyoyin Ethernet suna amfani da sauyawa.