Yuav Xaiv Kab Lus Dab Tsi Ethernet rau Koj Pawg?
Txhim kho koj lub network Ethernet, cov kab txuas hluav taws xob Ethernet cable yog qhov tseem ceeb. Thiab muaj ntau txoj hau kev rau Ethernet cables, xws li Cat5e, Cat6, Cat6a thiab hais txog. Yog tias koj paub qhov sib txawv ntawm cov sib txawv ntawm cov kab sib txawv ntawm Ethernet, koj yuav xav tias nws yooj yim heev los xaiv txoj cai Ethernet rau koj lub network. Txawm li cas los, puas yog qhov no tiag tiag los pab koj txiav txim siab? Puas muaj lwm yam uas koj yuav tsum tau ua rau hauv kev xav? Tsab ntawv no yuav qhia rau koj.
Ua ntej, cia peb rov qab xyuas qhov kev paub txog ntawm ntau hom hluav taws xob Ethernet. Rau cov ntaub ntawv ceev, Cat5e yog tsim los txhawb 1 Gigabit Ethernet nrog bandwidth mus txog 100MHz; Cat6 tuaj yeem txhawb siab dua tus nqi ntawm 10 Gigabit Ethernet nrog bandwidth mus txog 250 MHz; Cat6a txhais cov nris txog 500MHz ntawm cov kev siv ntawm 10G Ethernet. Rau kis nrug, Cat5e tuaj yeem ncav cuag 100 meters ntawm kev ceev ntawm 1Gbps; Cat6 muaj peev xwm khiav 100 meters nrog cov ntaub ntawv ceev txog li 1 Gbps thiab tsuas 55 meters ntawm cov kev ceev ntawm 10Gbps; Cat6a tuaj yeem txhawb qhov kev deb tshaj li 100 meters ntawm kev ceev ntawm 10Gbps. Hom twg ntawm Ethernet cables xaiv los nyob ntawm koj qhov yuav tsum tau rau kev sib kis ceev thiab nrug. Tom qab koj txiav txim siab txog qhov no, nws muaj qee yam tseem ceeb uas koj yuav tsum tau xav txog-ncaj-dhau los yog hla kev cable, UTP (unshielded twisted pair) lossis STP (shielded twisted cable) cable, ntev thiab xim. Cov nram qab no yuav tsom mus rau tej yam zoo li no.
Ethernet cable nres nrog RJ45 connector muaj yim xim-coded xov hlau. Cov kab xaum xim uas muaj kab xaum xim muaj nyob rau hauv kev lag luam. Thaum txuas RJ45 txuas mus rau ib kab, muaj ob txoj kab sib txuas-T-568A thiab T-568B. Ob tus qauv cov qauv no yog siv los tsim kab ncaj-dhau (T-568A los yog T-568B ntawm ob hnub), los yog crossover cable (T-568A rau ib kawg thiab T-568B ntawm lwm kawg). Yuav kom xaiv ib txoj kab ncaj-dhau, koj yuav tsum siv T-568A los yog T-568B ntawm ob hnub ntawm qhov cable; kom xaiv kab crossover, koj yuav tsum xaim T-568A rau ib kawg thiab T-568B ntawm lwm qhov kawg ntawm lub xov tooj. Nov yog daim duab ntawm T-568A thiab T-568B, uas koj tuaj yeem pom qhov txawv ntawm cov qauv no.
STP cable muaj hlau ntaub thaiv npog ib ncig ntawm txhua khub uas muaj cov tooj liab, ib txheej ntawm polymer los yog ib txoj hlua (feem ntau yog ua los ntawm tooj liab los yog txhuas). Nrog rau cov ntaub thaiv npog, EMI (electromagnetic cuam tshuam) thiab crosstalk ua tau zoo heev, uas ua rau muaj kev ua tau zoo ntawm kev sib kis ntawm cov khoom sib txawv. Thaum UTP cable tsis muaj shielding. Nws yog tsim los hloov kev cuam tshuam electromagnetic cuam tshuam los ntawm txoj kev uas khub yog cov nyob hauv lub cable. Yog tias Ethernet cable khiav hauv qhov chaw uas cuam tshuam los yog kev nyhav nyhav tsis yog lub ntsiab kev txhawj xeeb, nws tau hais kom xaiv UTP cables uas yog cov nqi qis dua. Tab sis, yog hais tias ib puag ncig muaj zog ntawm cov chaw ua muaj zog magnetic uas yuav muaj kev cuam tshuam rau kev ua haujlwm ntawm lub network, STP cable yog qhov kev xaiv yeej yog. Kom muaj kev to taub zoo dua qhov sib txawv ntawm UTP cable thiab STP cable, ntawm no yog daim duab ntawm cov qauv puab ntawm UTP cable thiab STP cable.
Thaum xaiv Ether cable rau koj lub network, koj yuav tsum xav txog qhov ntev thiab xim. Ethernet cable los hauv standard lengths xws li 1, 3, 5, 7, thiab 10 meter. Ntev ntev muaj, xws li ntau Cat5e cable 305m. Qhov kev ncua deb ntawm koj ntau qhov network thiab koj qhov kev hloov network lossis tus router yuav txiav txim siab qhov koj xav tau ntev npaum li cas. Ntxiv mus, Ethernet cable yog tsim los ntawm txhua hom xim, xws li xiav, grey, xim liab thiab lwm yam xim. Qhov kev txiav txim no tuaj yeem yog raws li koj tus neeg nyiam thiab nyiam.
Muaj tsis muaj kev ntseeg hais tias xaiv cov kab txuas rau Ethernet zoo tuaj yeem ua rau koj qhov haujlwm ua haujlwm nyob rau theem siab. Kuv vam tias qhov tsab xov xwm no tuaj yeem pab koj paub ntau ntxiv txog Ethernet cable thiab ua qhov kev xaiv rau koj qhov kev thov network. Muaj ntau hom Ethernet cables ntawm FOCC, xws li UTP Cat5e tej kab, STP Cat6 bulk cable thiab txuas rau. Kuj, nws muab ntau hom RJ45 couplers uas yog ib qho yooj yim uas yuav tau muab ob kab cab hluav taws xob tsawg mus rau ib qho ntev, xws li Cat6 coupler thiab Cat5e coupler.