Virtual Local Area Network (VLAN) yog kev sib txuas lus thev naus laus zis uas faib lub cev LAN rau hauv ntau qhov kev tshaj tawm xov xwm.
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Txhua VLAN yog qhov chaw tshaj tawm. Cov tswv hauv VLAN tuaj yeem sib txuas lus ncaj qha nrog ib leeg, tab sis tsis tuaj yeem sib txuas lus ncaj qha rau ib leeg. Ua li no, cov pob ntawv tshaj tawm raug txwv rau ib VLAN..
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Thaum Ntxov Ethernet yog cov ntaub ntawv sib txuas lus siv thev naus laus zis raws li CSMA / CD (Carrier Sense Multiple Access / Collision Detection) sib qhia kev sib txuas lus. Ntau tus tswv tsev tuaj yeem ua rau muaj kev tsis sib haum xeeb, kev tshaj tawm dej nyab, kev ua haujlwm tsis zoo, thiab txawm tias lub network tsis muaj. Txawm hais tias Txheej 2 cov cuab yeej tuaj yeem daws teeb meem tsis sib haum xeeb, lawv tsis tuaj yeem cais cov pob ntawv tshaj tawm thiab txhim kho lub network zoo.
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Hauv qhov no, VLAN thev naus laus zis tshwm. Hauv cov thev naus laus zis no, LAN tuaj yeem muab faib ua ntau qhov laj thawj vlans. Txhua VLAN yog qhov chaw tshaj tawm. Kev sib txuas lus ntawm cov tswv hauv VLAN yog tib yam li hauv LAN. Raws li pom hauv daim duab hauv qab no..
Yog li ntawd, vlans muaj qhov zoo hauv qab no:
● Txwv tsis pub tshaj tawm xov xwm: Tus tshaj tawm tshaj tawm tau txwv rau ib qho VLAN, uas txuag bandwidth thiab txhim kho kev ua haujlwm network.
● Txhim kho LAN kev ruaj ntseg. Pob ntawv nyob rau hauv txawv vlans yog cais los ntawm ib leeg. Ntawd yog, cov neeg siv hauv ib VLAN tsis tuaj yeem sib txuas lus ncaj qha nrog cov neeg siv hauv lwm cov vlans.
● Txhim kho lub network robustness: faults yog txwv rau ib tug VLAN nkaus xwb. Kev ua yuam kev hauv VLAN no tsis cuam tshuam rau kev ua haujlwm ib txwm ua ntawm lwm cov vlans.
● Kev tsim kho yooj yim ntawm pawg neeg ua haujlwm virtual: vlans tuaj yeem siv los muab cov neeg siv sib txawv rau ntau pawg haujlwm. Cov neeg siv hauv tib pab pawg ua haujlwm tsis txwv rau lub cev ruaj khov, uas ua rau kev tsim kho network thiab kev saib xyuas yooj yim dua.
Vlan technology yog dav siv nyob rau hauvhloov, ONU, OLTthiab lwm yam khoom siv sib txuas lus.
Cov saum toj no yog Shenzhen HDV Phoelectron Technology Ltd. coj cov neeg siv khoom hais txog VLAN cov lus qhia, thiab peb lub tuam txhab yog cov chaw tsim khoom tshwj xeeb ntawm optical network manufacturers, cov khoom lag luam koom nrogONUseries (OLT ONU/ACONU/CATVONU/GPONONU/XPONONU), Optical module series (optical fiber module / Ethernet optical fiber module / SFP optical module),OLTseries (OLTkhoom siv /OLT hloov/optical mivOLT), thiab lwm yam., muaj ntau yam specifications ntawm kev sib txuas lus cov khoom rau cov kev xav tau ntawm txawv scenarios rau network txhawb, txais tos mus tham.