Yokutsanya Ethernet michina akaita sei

Kwenguva refu desyatimegabitnaya pomumbure ndiyo chete nzira kubatanidza makombiyuta. Kunyange zvazvo nzira iyi aiva dzinoverengeka zvinhu (chivhariso-terminators, chiratidzo kudhumhana, chienderane chinozunguzirwa impedance), chitsvene-zvakapararira. The midziyo yaiva nekaupenyu chipa kugadzwa - nyore, uye kumhanya 1.25 MB / s suit wose. Zvisinei, bhuku nemashoko chinopfuudzwa kubva achikura ose gore, uye nemambure Hardware zvinodiwa akasungirirwa. Saka, mumakore 90 kutsiva yechinyakare chisarudzo akauya Fast Ethernet rwokugadzira. vakatorwa nhoroondo, "zvirwere pauduku" 10-Mbit network vari kukunda kukura zvido vanoshandisa uye vagadziri.

Fast Ethernet. tsananguro

Nguva yokuberekwa 1992 anogona kunzi munhu ano gore. Panguva iyoyo boka makambani mubasa pakusikwa networking zvokushandisa, kusanganisira 3Com, nhatu dzokutanga uye vanoverengeka nevamwe ndakasika dzomunyika chaiyo pamwe inonzi "Fast Ethernet Alliance". mabasa ayo anosanganisira kuongorora zviitiko zviri vagadziri siyana, izvo zvinogona kushandiswa pave mukuru-nokukurumidza Data hutachiwana mhinduro. Uyezve, nheyo inotungamirwa uye kupararira date omumasherufu havafaniri kuva zvakare vakasiyana 10-megabit network. Izvi zvakanga zvakakodzera kuti tirambe kugarisana naye mapindiro CSMA / CD.

Mugore iroro muna IEEE Standards Association yakaumbwa, ane basa raiva kudzidza inopiwa Mapoka 100-megabit kuwana mhinduro. Saka vakatanga paangavanda nebope makambani uye dzavo kuitika. yokuvaka ose vakatsvaka nechokwadi kuti chaiva chisarudzo chake rakagamuchirwa sechiero.

Somugumisiro, sezvo zvinowanzoitwa, vanhu vazhinji raifanira kubayirwa pedyo nzwisisa. Somuenzaniso, yaida 100VG-AnyLAN michina kubva HP uye AT & T, iyo zvokurimisa neitsva nheyo kuwana Raidiwa Pokutanga, akarambidzwa nokuti haana shure-inowirirana yaivapo mhinduro 10Base.

Mugumisiro basa rakanga kuzivikanwa muna 1995 100-megabit mhinduro Fast Ethernet mureza, rokuti 802.3u.

Features

Musiyano mukuru pakati Fast Ethernet nowakautangira - 10 Mbps Base-T - yaiva nokuchinja kwomuviri Implementation.

Kunze kugarisana wambotaurwa mhinduro, chikuru zvakanakira zvigadzirwa ichi ndiwo:

- kuwedzera date mwero kusvika 12,5 Mbytes / s (zvakafanana 100 Mbps);

- kushandiswa asingashumbi kuwana;

- mukana kwokushandisa kwakajairika zvinogadzirisa, nokuti akachengetedzwa basa kuumba nyeredzi-zvakaumbwa network, uye kunogona kushandiswa dzekare kondakita: yakakoswa vaviri uye faibha.

Sezvo pamanyorerwo Fast Ethernet Data omumasherufu mudonzvo akaramba chete, zvinokwanisika kuti vabudirire kutopedza neshure kugarisana. Saka, kunyange iye zvino, zvose samambure mhinduro 100 Mbps uye kunyange 1 gigabit zvinopa 10-Mbps muoti (inogona kuisa kumanikidza ari mutyairi).

Kunyange zvakadaro, pane misiyano. Somuenzaniso, pamatanda yedzimudzangara nguva zvikamu vave kuderedzwa kusvika 10 nguva (chokwadi, zvinoita kuti vabudirire kumhanya kudaro).

Features zvikamu

Sezvo Ethernet sarudzo, havashandisi coaxial waya, 100 Mbps Fast Ethernet zvinoda riine Migumo yose mapazi vagamuchiri. Izvi zvinogona kuva Network makadhi makombiyuta, hubs uye nomusimboti (nomusimboti). On line urefu kukamurwa rinorambidzwa zvichienderana norudzi kondakita. Nokudaro, kusarurama vaviri wechishanu muchikwata zvinobvumidzwa daro riri 100 metres, asi ambotirega kushanda faibha 400 M (hafu duplex) kusvika 2 km.

Kunyange zvazvo nhamba repeaters (repeater) chiri zvishoma, hazvina kutadzisa pakusikwa kunzwisisa network ine multi-chengarava redunhu nokuda akadaro namano.