Yuav ua li cas yog Ethernet - lub ntsiab zoo ntawm online network

Qhov ntawd yog qhov Ethernet, nws los ua lub npe hu nyob rau hauv lub seventies ntawm lub XX caug xyoo. Kuv yees hom LAN Robert Metcalfe, uas tau ua hauj lwm thaum lub sij hawm ntawm lub Xerox Corporation. Nyob rau hauv lub lig '70s Metcalfe qhib nws lub tuam txhab 3com, qhov uas nws ua tiav txoj kev loj hlob ntawm cov tshiab technology. Thaum lub sij hawm nws hloov uas twb muaj lawm ces hom ntawm lub zos tes hauj lwm, thiab lub tuam txhab Metcalfe los ua tus thawj coj nyob rau hauv daim teb no.

Lub sij hawm «Ethernet» yog ua los ntawm cov lo lus ether (ether) thiab net (network). Tam sim no qhia tau rau koj ntau, uas yog Ethernet, thiab dab tsi yog qhov tseem ceeb nta ntawm no hom ntawm network. Qhov no hom ntawm network muaj ib lub hnub qub los yog linear qauv nrog ib tug tshaj tawm los ntawm 10-100 megabits / ob. Keeb Ethernet yog raws li nyob rau hauv lub coaxial cable, tab sis lub sij hawm lub technology tau hloov, thiab tau pib tsim ib tug network raws li nyob rau hauv fiber-optic cable los yog cov khub. Tam sim no muaj txog peb caug hom Ethernet tes hauj lwm uas txawv nyob rau hauv ceev, topography, luaj li cas thiab hom ntawm cable. Tsis yog txhua txhua hom muaj nyob coj mus muag daim ntawv thov. Rau cov neeg uas xav paub nyob rau hauv kom meej li cas lub Ethernet, peb sau cov nrov tshaj plaws technology.

Xerox Ethernet - technology raws li coaxial cable nrog ib tug nqi siab tshaj ntawm 3 megabits ib ob. Kev hloov kho StarLan, uas twb xub siv cov khub. Cov kev ceev ntawm lub kev twb kev txuas yog me me - tsuas yog 1 megabit ib ob.

Lub tshuab 10BASE5 coaxial cable hau cov ntaub ntawv ntawm speeds ntawm 10 megabits / ob. Raws nraim tus ceev tib yam thiab nyob rau hauv StarLan10, tab sis coaxial cable no tau raug hloov nrog cov khub. Tom qab no, qhov no technology tau ua ib tug zoo ntawm 10BASE-T, qhov twg lub plaub cov officers siv.
Nyob rau hauv ib tug kev hloov kho ntawm 100BASE-T twisted-khub ceev zog rau ib puas megabits / ob. Qhov no hom tau tsim ntxiv. 100BASE-FX hau cov ntaub ntawv dua fiber optic cable ntawm ib tug deb ntawm 10 kilometers ntawm ib tug ceev ntawm ib puas megabits / ob. Lub 1000BASE-T siv plaub officers vytye, thiab qhov kev ncua deb yog sib npaug zos rau ib puas meters. Nyob rau hauv ib tug kev hloov kho 1000BASE-LH deb zog rau 100 km. lub yav tas ob muaj lub siab tshaj plaws ceev, nws yog mus txog 1000 megabits ib ob.

Ethernet, uas muaj xws li tag nrho cov kev hloov kho yog kev cob cog rua nrog ib tug tshwj xeeb xws li kev rau lub system board.

Tam sim no cia saib dab tsi yog qhov zoo ntawm no hom ntawm network. Qhov tseem ceeb tshaj nws kom zoo dua - nws yog muaj. Lub computer yog kev cob cog rua rau lub network tag nrho cov sij hawm, thiab ua ntej koj mus online yog tsis muaj yuav tsum tau hu mus muab kev pab. Nyob Ethernet yeej tseem zoo muab hu ua ib xauj kab, nyob rau hauv uas lub modem yog tsuas yog tsis xav tau. Lwm zoo dua - ib tug kev kub ceev uas tso cai rau lub Ethernet raws tu qauv. Ceev yog muab los ntawm yam, seb qev ntaub ntawv los yog xa mus. Nyob rau hauv tas li ntawd, ib tug Ethernet-kev twb kev txuas yuav ua tau lub hauv paus ntawm ib tug neeg lub los yog cheeb tsam network nyob rau hauv tag nrho cov uas computers yuav muaj mus rau lub siab tib yam ceev kev twb kev txuas.

Security nyob rau hauv hnub no lub Ethernet-network no kuj zoo ib lub koom haum. Feem ntau, cov chaw kho mob muaj cov neeg siv tiag tiag IP-chaw nyob kom lawv ntawm lub computer nyob rau hauv lub "World Wide Web." Ntawm cov hoob kawm, tsis yog tus kawg kom zoo dua ntawm xws li ib tug network yog tsis tshua muaj ib qho yooj yim mus cuag. Koj tsis tas yuav ib tug modem los yog muaj kev tshwj xeeb software, cia li muaj ib tug network card uas yog ua nyob rau hauv yuav luag tag nrho cov motherboards. Qhov no yog vim lub simplicity thiab VR thiab tus nqi qis ntawm Ethernet-kev twb kev txuas. Nws raug nqi ntau tsawg tshaj li lub ntiaj teb no connectivity los ntawm dial-up modem.

Thaum lub sij hawm, qhov no hom ntawm network yuav ua txawm ntau mus siv cuag. Twb, muaj kev hloov kho, muab ib tug ceev ntawm txog 10 gigabits / ob. Los ntawm nruab nrab ntawm no xyoo caum yog kev tsim cov zis technology, uas yuav muab ib tug ceev sib npaug zos rau 1 terabit / ob. Nrog xws impressive kev xam pom ntawm txhua to taub dab tsi lub Ethernet, yuav xav mus txuas rau uas network.