Dab tsi yog qhov sib txawv ntawm cov optical fiber cable, network cable thiab cable
Hauv network kho vajtse, kuj tseem muaj ib hom xov tooj sib txuas xov tooj uas tsis tuaj yeem tsis quav ntsej, peb ib txwm hu network cable. Lub network cable nquag tau faib ua nyias twisted khub,optical fiber ntau cable, coaxial cable thiab tuab coaxial cable.
1. Optical fiber cable: kho qhov muag hluav taws xob cable yog ib tiam tshiab ntawm kis nruab nrab. Piv nrog tooj liab nruab nrab, cov hluav taws xob fiber ntau tau ua tiav zoo nyob rau hauv kev nyab xeeb, kev ntseeg tau thiab lub network zoo. Tsis tas li ntawd, qhov kev siv xov tooj cua ntawm kev xa xov hluav taws xob muaj ntau dua li qhov ntawm cov tooj liab cable, thiab qhov siab tshaj plaws kev sib txuas tau txhawb los ntawm cov kho qhov muag fiber ntau yog ntau tshaj ob mais, uas yog cov kev xaiv tsis pom kev los tsim kom muaj cov network loj. Vim hais tiasoptical fiber ntau cablemuaj qhov zoo ntawm kev tiv thaiv zoo electromagnetic cuam tshuam, muaj kev ruaj ntseg zoo, lub nrawm nrawm thiab loj kis tau, nws tseem kim dua thiab tsis tshua muaj siv hauv tsev neeg. Muaj ob hom sib txawv ntawm fiber ntau, ib hom fiber ntau thiab multimode fiber (thiaj li hu ua" hom" hais txog cov nqaj ntawm lub teeb nkag mus rau ntawm fiber ntawm lub kaum sab xis). Multimode optical fiber feem ntau siv rau kev sib txuas network hauv tib qho chaw ua haujlwm lossis thaj chaw ze. Hom fiber ntau ib txwm siv los txuas cov kev sib txuas ntawm cov chaw ua haujlwm lossis ntau qhov chaw sib kis vim tias nws cov haujlwm siab dua thiab kev sib kis ntev. Yog tias cov hluav taws xob fiber ntau siv ua lub tshuab xa xov nruab nrab, qhov kho qhov muag thiab lwm yam khoom siv yuav tsum tau ntxiv, yog li tus nqi siab dua thiab tsawg siv hauv kev siv dav dav.
2. Twisted pair: twisted pair yog ib hom ntawm cov kev sib txuas lus cable kom yooj yim, suav nrog cov khub ntawm cov kab hluav taws xob uas tsis muaj hluav taws xob. Nws yog tsiag ntawv los ntawm tus nqi qis, yog li nws tau siv dav dav, xws li peb cov xov tooj siv ntau. Raws li qhov sib txawv ntau qhov kev xa tawm ntau tshaj plaws, cov sib ntswg sib xyaw muaj peev xwm muab faib ua 3 hom, 5 hom thiab super 5 hom. Tus nqi ntawm Pawg 3 twisted khub yog 10MB / s, uas ntawm qeb 5 tuaj yeem ncav cuag 100MB / s, thiab hais tias ntawm chav kawm super 5 tuaj yeem ncav ntau dua 155Mb / s, uas tuaj yeem ua tau raws li qhov xav tau ntawm cov ntaub ntawv xov xwm yav tom ntej. Yog li, nws raug nquahu kom siv qeb 5 lossis txawm rau qeb 5 twisted khub. Twisted khub tseem tuaj yeem muab faib ua nkawm sib tw tiv thaiv (STP) thiab cov khub tsis sib xws (UTP). Txawm hais tias qhov ceev ntawm STP twisted khub yog tus nqi tsawg (tsuas yog 4MB / s), nws cov kev ua haujlwm tiv thaiv kev cuam tshuam zoo dua li ntawm UTP twisted khub, yog li tus nqi yog ntau kim. Cov khub sib tw no yog ob peb yuan ib lub hlis uas pheej yig dua, thiab tus uas yuav kim dua tuaj yeem tsuas yuav ntau dua kaum yuan. Hauv kev sib piv, UTP twisted khub tus nqi feem ntau yog kwv yees li ib yuan ib meter, uas yog tus nqi qis dua. Ib qho ntxiv, feem ntau siv 10m thiab 100m unshielded twisted khub yog 10Base-T thiab 100Base-T, uas tuaj yeem pom hauv khw. RJ45 siv lead ua lub taub hau yog siv los ua qhov kev sib koom ua ke ntawm kev sib ntswg thiab RJ45 daim npav network. Nws qhov zoo yog ncaj qha ntsig txog qhov ruaj ntseg ntawm tag nrho cov network thiab tsis tuaj yeem tsis quav ntsej.
3. Coaxial cable: coaxial cable yog ib hom kev xa cov khoom nruab nrab uas ntau tus phooj ywg paub. Nws yog ib hom ntawm cable nrog central tooj neeg xyuas pib qhwv los ntawm ib txheej ntawm insulating hlau. Nws qhov loj tshaj plaws yog qhov zoo los tiv thaiv kev cuam tshuam kev muaj peev xwm, cov ntaub ntawv xa mus ruaj khov, thiab tus nqi qis, yog li nws yog ib zaug siv dav dav, xws li kaw-Circuit Court TV kab. Txawm li cas los xij, yav dhau los, cov xov tooj coaxial ntau dua tau siv, feem ntau vim tias tus nqi qis tsheb npav qauv tsim cov coaxial cables. Txawm li cas los xij, kev puas tsuaj ntawm ib qho cable yuav ua rau tuag tes tuag taw ntawm tag nrho cov network, uas tseem nyuaj rau kev tswj, uas yog nws qhov kev cuam tshuam loj tshaj plaws. Coaxial cable nyob rau hauv Ethernet daim ntawv thov tsuas yog muab faib ua ob hom: tuab coaxial cable (10BASE5) thiab nyias coaxial cable (10base2). Tuab coaxial cable tsis siv ntau ntau, tab sis cov coaxial cable tseem muaj qee qhov kev ua lag luam. Nyias coaxial cable kev ua lag luam nqe ob peb yuan ib 'meter', tsis kim heev dhau. Ntxiv rau, cov xov coaxial yog siv los txuas nrog BNC lub taub hau. Cov coaxial cable muag hauv khw yog feem ntau cov khoom tiav tiav uas tau txuas nrog BNC lub taub hau, yog li koj tuaj yeem xaiv nws ncaj qha.
