Iingcingo zeeNkonkco zeeTyhini ziLAN Technology
Ephuhliswe yi-IBM ngexesha lama-1980 njengenye indlela eya kwi- Ethernet , i-Token Ring iyinkqubo yekhompyutheni yedatha yedatha yamanethiwekhi asekuhlaleni (i-LANs) apho izixhobo zixhunyiwe kwiinkwenkwezi okanye i-topology ye-ring. Isebenza kwinqanaba eli-2 lomzekelo we- OSI .
Ukususela kuma-1990, i-Token Ring yayinciphile kakhulu ekuthandeni kwaye yancipha kancane kancane kumanethiwekhi oshishino njengoko iteknoloji ye-Ethernet yaqala ukulawula iiLAN.
I-Standard Token Ring isekela kuphela kwi-16 Mbps . Ngama-1990, isicwangciso sezoshishino ezibizwa ngokuba yi- High Speed Token Ring (HSTR) zenze iteknoloji yokwandisa i-Token Ring ukuya kwi-100 Mbps ukukhuphisana ne-Ethernet, kodwa inzala engenayo kwimarike ikhona kwiimveliso ze-HSTR kwaye iteknoloji yashiywa.
Ikhonkco Yomqondiso Osebenzayo
Ngokungafani nazo zonke iifom eziqhelekileyo ze-LAN, i-Token Ring igcina enye okanye ngaphezulu kweefayile zedatha eziqhelekileyo eziqhubeka zijikeleza ngethungelwano.
Ezi zixhobo zikwabelwana ngazo zonke izixhobo ezixhunyiwe kwi-intanethi ngolu hlobo lulandelayo:
- Isakhelo ( ipakethe ) sifika kwisixhobo esilandelayo ngokulandelelana kwendandatho.
- Esi sixhobo sihlola ukuba isakhelo siqulethe umyalezo obhekiswe kuyo. Ukuba kunjalo, ifowuni isusa umyalezo kwisakhelo. Ukuba akunjalo, ifreyimu ayinalutho (ebizwa ngokuba yicwecwe lesigxina ).
- Isixhobo esibambe isakhelo sinquma ukuba uthumele umyalezo. Ukuba kunjalo, ifaka idatha yomyalezo kwifom yesitokhwe kwaye ibuyisele kwi-LAN. Ukuba akunjalo, ifowuni inokukhupha isakhelo sobonakaliso kwisicatshulwa esilandelayo ngokulandelelana.
Ngamanye amazwi, ngomgudu wokunciphisa ukudibanisa kwenethiwekhi, kuphela enye ifowuni isetyenziswa ngexesha. Amanyathelo angentla aphindaphindiwe ngokuqhubekayo kuwo onke amacebo kwiphini lokutshintshela.
Iimpawu ziyi- bytes ezintathu eziqulethwe ngumtya wokuqalisa nokugqibela ochaza ukuqala nokuphela kwesakhelo (oko kukuthi baphawula imida yesakhelo). Kwakhona kwidokethi yindlela yokulawula yokufikelela. Ubude obude bendawo yeedatha ngu-4500 bytes.
Uluhlu lweNqakraza olulinganisa njani ne-Ethernet
Ngokungafani nenethiwekhi ye-Ethernet, iisetyenzisi kwinethiwekhi ye-Token Ring ingaba neyona dilesi ye-MAC ngaphandle kokubangela imiba.
Nazi ezinye iintlukwano:
- Ukukhwabanisa kweekhonkco ze-Token Ring kunexabiso eliphezulu kune-Ethernet ye-CAT 3 / 5e. Kwakhona amaxabiso amaninzi amakhadi kunye nenxweme.
- Unxibelelwano lweekhonkco zePonti lungalungiselelwa apho ezinye iinombolo zingabangela phambili kunabanye, into engavumelekanga nge-Ethernet engazalwanga.
- Njengoko kukhankanywe ngasentla, amanethwekhi e-Token Ring asebenzise amathokheni ukuphepha ukudibanisa, ngelixa iinqununu ze-Ethernet (ngokukodwa xa zisetyenziselwa i-hubs) zithandwa kakhulu. Yingakho amanethiwekhi ase-Ethernet asebenzisa ukutshintsha.