Ethernet yog dab tsi?
Nws paub tias Ethernet yog tsim los ntawm Xerox, thiab koom tes tsim los ntawm cov txheej txheem LAN los ntawm Xerox, Intel thiab DEC. Txawm hais tias Ethernet yog tus qauv kev sib txuas lus tshaj plaws hauv LAN tam sim no, thiab nws zoo li tseem muaj coob tus neeg tsis totaub txog qhov teebmeem, Ethernet yog dabtsi? Thiab tam sim no, qhov no tsab xov xwm yuav qhia nws rau peb.
Lub ntsiab txhais ntawm Ethernet
Ethernet belongs rau ib qho ntawm LANs nrog rau ntau qhov kev siv cov ntaub ntawv, ua tau rau thaum ntxov ntawm 70s; Nws yog ib qho qauv IC, nws tus nqi sib txuas yog 10Mbps. Nws muaj koom sib txuas xov xwm tawm thiab kab ua lag luam, twj ywm, Choj Network. Nrog rau nws cov hom, nws tau ua los ntawm Standard Ethernet (10Mbit / s), Fast Ethernet (100Mbit / s), 10G Ethernet (10Gbit / s), adopting CSMA / CD access tswj thiab paub tseeb tias IEEE802.3. Nyob hauv Ethernet, tag nrho cov computers muaj kev txuas nrog tib coaxial cable, thiab CSMA / CD (Carrier Sensing Multiple Access With Accision Detection), txoj kev sib tw mechanism thiab tsheb thauj mus los ntawm cov tsheb thauj mus los. Tsis tas li ntawd, tam sim no Ethernet muaj nyob rau ntawm plaub hom kev sib kis mob raws li cov kev txhawb zog ntawm fiber ntau thiab nkawm twisted:
l 10 Mbps - 10Base-T Ethernet (802.3)
l 100 Mbps - Fast Ethernet (802.3u)
l 1000 Mbps - Gigabit Ethernet (802.3z))
l 10 Gigabit Ethernet - IEEE 802.3ae
Evolution ntawm Ethernet Technology
Thaum pib, Ethernet tsuas yog nrog 10Mbps tuav lub peev, siv CSMA / CD txoj kev. Xws li Ethernet hu ua standard Ethernet, muaj peev xwm siv cov kab xev xaim hluav taws xob, cab kab xev khaus, UTP (Unshielded Twisted Pair), STP (Shielded Twisted Pair) thiab fiber raws li kev sib txuas xov xwm rau kev txuas. Nyob rau hauv IEEE 802.3 txuj ci, txawv cov qauv txheej txheem sib txawv tshwj xeeb uas tau muab rau ntau txoj kev sib kis ntawm medias, uas tus zauv hauv ntej txhais tau hais tias kev sib kis (chav tsev: Mbps); tus nab npawb kawg yog nruab nrab ntawm qhov ntev ntawm ib qho cable cable (unit: 100m); lub hauv paus txhais tau hais tias lub hauv paus band thiab lub broad txhais tau hais tias broad band.
Tom qab ntawd nrog txoj kev loj hlob ntawm lub network, cov Ethernet tsoos yog ib qho nyuaj rau kev ua pace nrog cov kev xav paub ntau ntxiv nyob rau hauv cov ndlwg ntawm cov ntaub ntawv network. Ua ntej Lub Kaum Hli, xyoo 1993, rau cov ntawv tso cai ntawm LAN tshaj 10Mbps, tsuas yog Fiber Distributed Data Interface (FDDI) yog lwm qhov, tab sis nws yog LAN nrog tus nqi siab thiab raws li 100Mpbs fiber ntau. Yog li ntawd, thaum lub Kaum Hlis, xyoo 1993, lub Ceev Ethernet tau los pom. Tom qab ntawd, Gigabit Ethernet thiab 10G Ethernet tseem muaj feem thib ib nrab thiab tom qab xyoo 1990, thiab nyob rau xyoo 2002.
Lub neej yav tom ntej ntawm Ethernet
Thaum nws tawm los rau txoj kev loj hlob ntawm cov kis tau tus mob, nws tau ntseeg tias Ethernet yog tsim los ntawm qhov kev nce qib. Hauv peb caug xyoo dhau los, Ethernet tau raug tsim los ntawm tus nqi ntawm kaum lub sij hawm tas nrho, txij 10Mbps-100Mbps-1Gbps-10Gbps. Txawm tias cov kauj ruam tom ntej ntawm Ethernet tsis tau paub tseeb tias nws yog 40Gbps los yog 100Gbps, thiab cov thawj tuam txab manufacturers hauv lub tshav tau tsim Ethernet chips, txhua tus uas txhawb 20 cov chaw nres nkoj ntawm 10GE, thiab kuaj cov 100Gbps tech. Dhau li ntawd, nws lub hom phiaj yog kom muab cov kev pabcuam hauv Port-Port Ethernet thiab cov kev pabcuam Ethernet.
Xaus
Tshaj tag nrho yog hais txog Ethernet. Ethernet yog dab tsi? Ntawm lo lus nug no, ntseeg nws cov lus teb yog qhov cuab kev tseeb. Los ntawm txoj kev, muaj ntau yam khoom kho qhov muag rau 10G Ethernet, xws li 10G SFP + AOC, 10G SFP + AOC / DAC, SFP + optical transceiver module thiab li ntawd. Yog tias koj muaj kev xav tau rau lawv, Txais tos hu rau FOCC.
