
fiber distributed daatta interface

fiber distributed daatta interface (eph. dii. dii. aii) oru local eriya nettvarkkile daatta traansmishante oru maanadandamaanu.
ithu opttikkal fiberine athinte staanderd adisthaana bhauthika maadhyamamaayi upayogikkunnu, ennirunnaalum pinneedu chembu cable upayogikkaan nirddeshikkappettu, eee saahacharyathil ithine sii. dii. dii. aii (chembu distributed daatta interface) ennu vilikkam, ithu tii. pii-pii. emm. dii (twisted-perr physical meediyam-dependent) ennum ariyappedunnu, ithu tii. pii-dii. aii (twisted-perr distributed daatta interface) ennum ariyappedunnu.
athe 100 emm. bii. tii/second vegatha vaagdaanam cheiyunna phaast itharnettu vazhi praadeshika netvarkkukalil eph. dii. dii. aii phalapradamaayi kaalaharanapettu, pakshe valare kuranja chelavil, 1998 muthal, gigabit itharnettu athinte vegathayum kuranja chelavum sarvvyaapithvavum kaaranam.
vivaranam.
local eriya nettvarkkile daatta traansmissionaayi eph. dii. dii. aii 100 emm. bitt/seey opttikkal staanderd nalkunnu, athu paridhi vare vyaapippikkaan kazhiyum. eph. dii. dii. aii logical topology oru ring adhishtitha tokkan nettvarkkaanenkilum, athu aii. iii. iii. iii. iii. <aii. dii. 1> tokkan ring protocol athinte adisthaanamaayi upayogichilla; pakaram, athinte protocol aii. iii. iii. iii. iii. <aii. dii. 2> tokkan buzz "timed tokkan" protocolil ninnaan uruthirinjathu. valia bhoomishaasthraparamaaya pradeshangal ulkkollunnathinu purame, eph. dii. dii. aii local eriya netvarkkukalkku aayirakkanakkin upayokthaakkale pinthunaykkaan kazhiyum. eph. dii. dii. aii oru duval-attached steshan (daas), kaundar-rotating tokkan ring topology, single-attached steshan (ezz. eiii. ezz), tokkan buzz passing ring topology enniva vaagdaanam cheiyunnu.
american naashanal staanderds instittyoott x3t9.5 (ippol x3t12)-nte uthppannamenna nilayil, mattu protocolukal upayogichu ooppan systems intarkanakshan (osi) functional layering modalinu anusrithamaayi eph. dii. dii. aii pravartthikkunnu. 1980kalude madhyathilaanu staanderd prakriya aarambhichath.
1989ll vivaricha eph. dii. dii. aii. yude oru pathippaya eph. dii. dii. aii-aii. shabda, viidiyoo signalukal kaikaaryam cheyyaanum netvarkkilekku surcuted-switch cheytha sevana sheshi chertthu. eph. dii. dii. aii nettvarkkukale sinkranas opttikkal networking (soonat) saankethikavidyayumaayi bandhippikkunnathinulla pravartthanangal aarambhichu.
oru eph. dii. dii. aii netvarkkil rund ringukal adangiyirikkunnu, onnu praadhamika ring parajayappettaal dvitheeya baakkappaayi. praadhamika valayam 100 emm. bii. tii/seey vare sheshi vaagdaanam cheiyunnu. oru netvarkkinu backup cheyyaan secondary ring aavashyamillaathappol, athinu daatta vahikkanum kazhiyum, sheshi 200 embitt/second vare vyapippikkum. orotta valayathinu paramavadhi dooram neettaan kazhiyum; oru eratta valayathinu neettaan kazhiyum. eph. dii. dii. aikku staanderd itharnettu kudumbathekkaal valia paramavadhi frame valuppamundaayirunnu (4,352 bitukal), ithu paramavadhi frame valuppamaya 1,500 baittukale maathrame pinthunaykkunnulloo, ithu chila sandarbhangalil mikacha phalapradamaaya dattaa nirakkukal anuvadikkunnu.
topology.
designermar saadhaaranayaayi "marangalude eratta valayam" polulla oru network topologyil eph. dii. dii. aii valayangal nirmmikkunnu. hoost computerukalekkaal ruterukal, konsentrettarukal thudangiya adisthaana soukarya upakaranangal, rund ringukalilum "duval attaachucheytha" oru cheria ennam upakaranangal. hoost computerukal pinneedu ruterukalilekko konsentrettarukalilekko otta attached upakaranangalayi bandhippikkunnu. ettavum degenerate roopathilulla eratta valayam orotta upakaranamaayi thakarunnu. saadhaaranayaayi, oru computer muriyil muzhuvan duval ring adangiyirunnuvenkilum chila nadappaakkalukal eph. dii. dii. aii oru metropolittan eriya nettvarkkaayi vinyasichu.
eph. dii. dii. aikku eee network topology aavasyamaanu, kaaranam duval ring yadhaarthathil bandhippichirikkunna oro upakaranathiloodeyum kadannupokunnu, atharam oro upakaranavum thudarchayaayi pravarthikkendathundu.
staanderd yadhaarthathil opttikkal bipassukal anuvadikkunnu, ennaal network enchineeyarmaar iva vishwasaneeyamallaathathum pishak saadhyathayullavayumaayi kanakkakkunnu. network maanejarmaarude niyanthranatthil varaatha varkksteshanukal, miinii computerukal thudangiya upakaranangal duval ringilekk connectucheyyaan anuyojyamalla.
eratta attached kanakshan upayogikkunnathinu pakaramaayi, ore eph. dii. dii. aii ringile rund vyathyastha upakaranangalilekku oresamayam nirmmicha eratta-hoomed kanakshaniloode oru varkksteshanu ore alavilulla prathirodhasheshi nedaan kazhiyum. kanakshanukalilonnu sajeevamaakumbol mattonn yaanthrikamaayi block cheyyappedum. aadyathe kanakshan parajayappettaal, backup link kaalathaamasamillathe ettedukkunnu.
frame formet.
tokkan ringinteyum etharnettinteyum athe chaakrika redendency check frame check sequence upayogikkunnu.
internettu enchiniyaring task fozhsu eph. dii. dii. aii. yiloode internettu protocol (eee saahacharyathil protocol dattaa unitaayirikkum) kaimarunnathinulla oru maanadandam nirvachichu. 1989 juunil ithu aadyamaayi nirddeshikkukayum 1990ll parishkarikkukayum cheythu. protocolinte chila vashangal logical link niyanthranathinulla aii. iii. iii. iii <aii. dii. 1> staanderdumaayi poruthappedunnu. udaaharanathinu, itharnettu kudumbatthil janapriyamaaya 48-bitt mack vilaasangal. athinaal adrus resolution protocol (aarpi) polulla mattu protocolukalum saadhaaranamaayirikkaam.
vinyaasam.
nilavilulla itharnettu netvarkkukal 10 embitt/second daatta nirakkukal maathram vaagdaanam cheythirunnathinaal 1990 kalude thudakkam muthal pakuthi vare eph. dii. dii. aii aakarshakamaaya campus baakkbon network saankethikavidyayaayi kanakkaakkappettirunnu, tokkan ring netvarkkukal 4 embitt/second allengil 16 embitt/second nirakkukal maathrame vaagdaanam cheythirunnulloo. athinaal 100 emm. bitt/second vegathayulla aaa kaalaghattatthile thaarathamyena uyarnna vegathayulla thiranjeduppaayirunnu ithu.
1994 aayappozhekkum sisko sisttangal, deseeya ardhachaalaka, network peripheralukal, sysconnect (marwell teknolaji group etteduthathu), 3 coom enniva ventermaaril ulppettu.
eph. dii. dii. aii instaaleshanukalkku pakaram pradhaanamaayum itharnettu vinyaasam nadathiyittundu.
maanadandangal.
eph. dii. dii. aii maanadandangalil iva ulppedunnu