Local Area Network (LAN)
Nws hais txog ib pab pawg computer uas muaj ntau lub khoos phis tawj sib txuas hauv ib cheeb tsam. Feem ntau, nws yog nyob rau hauv ob peb txhiab meters hauv txoj kab uas hla. LAN tuaj yeem paub txog kev tswj cov ntaub ntawv, daim ntawv thov software sib koom, luam ntawv
Cov yam ntxwv muaj xws li kev sib faib tshuab, teem caij hauv pawg ua haujlwm, kev pabcuam email thiab fax, thiab lwm yam. Lub hauv paus cheeb tsam network raug kaw thiab tuaj yeem tsim los ntawm ob lub khoos phis tawj hauv chaw ua haujlwm.
Nws tuaj yeem muaj ntau txhiab lub khoos phis tawj hauv ib lub tuam txhab.
Wide Area Network (WAN)
Nws yog ib qho kev sau ntawm cov khoos phis tawj sib txuas uas nthuav dav hauv cheeb tsam loj. Feem ntau hla cov xeev, nroog, lossis ib lub tebchaws. Ib thaj chaw dav dav suav nrog cov subnets ntawm ntau qhov sib txawv. Subnets tau
Nws tuaj yeem yog thaj chaw hauv cheeb tsam lossis thaj chaw me me dav dav.
Qhov sib txawv ntawm thaj chaw hauv cheeb tsam network thiab thaj chaw dav dav
Ib cheeb tsam hauv cheeb tsam network yog nyob rau hauv ib cheeb tsam, thaum lub cheeb tsam dav network spans ib cheeb tsam loj. Yog li yuav txhais li cas rau thaj chaw no? Piv txwv li, lub taub hau ntawm lub tuam txhab loj nyob hauv Beijing.
Beijing, thiab ceg tau nthuav dav thoob plaws lub tebchaws. Yog hais tias lub tuam txhab txuas tag nrho cov ceg ua ke los ntawm lub network, ces ib ceg yog ib cheeb tsam hauv cheeb tsam network, thiab tag nrho lub hauv paus chaw ua haujlwm.
Lub tuam txhab network yog ib cheeb tsam dav.
Dab tsi yog qhov txawv ntawm WAN chaw nres nkoj thiab LAN chaw nres nkoj ntawm lub router?
Niaj hnub no lub broadband router yog ib qho kev sib koom ua ke ntawm routing + hloov. Peb tuaj yeem xav tias nws yog ob qho khoom siv.
WAN: Siv los txuas rau cov chaw nyob IP sab nraud, feem ntau yog hais txog egress, thiab xa IP cov ntaub ntawv pob ntawv los ntawm sab hauv LAN interface.
LAN: Siv los txuas rau qhov chaw nyob IP sab hauv. Hauv LAN yog qhov hloov pauv. Peb tsis tuaj yeem txuas rau WAN chaw nres nkoj thiab siv lubrouterzoo ib yamhloov.
Wireless LAN (WLAN)
WLAN siv hluav taws xob nthwv dej xa thiab tau txais cov ntaub ntawv hla huab cua yam tsis tas yuav siv xov xwm cable. Cov ntaub ntawv kis tus nqi ntawm WLAN tam sim no tuaj yeem ncav cuag 11Mbps, thiab qhov kis tau tus mob yog
Nws yog ntau tshaj 20 km deb. Raws li lwm txoj hauv kev los yog txuas ntxiv ntawm cov kab txuas ib txwm siv, wireless LAN tso cov tib neeg los ntawm lawv lub rooj thiab tso cai rau lawv ua haujlwm txhua lub sijhawm.
Kev nkag mus rau cov ntaub ntawv nyob qhov twg los txhim kho cov neeg ua haujlwm hauv chaw ua haujlwm.
WLAN sib txuas lus siv ISM (Industrial, Scientific, Medical) xov tooj cua tshaj tawm xov tooj cua. Tus qauv 802.11a rau WLAN siv 5 GHz zaus band thiab txhawb nqa ntau tshaj.
Qhov siab tshaj plaws ceev yog 54 Mbps, thaum tus qauv 802.11b thiab 802.11g siv 2.4 GHz band thiab txhawb nqa ceev txog li 11 Mbps thiab 54 Mbps feem.
Yog li dab tsi yog WIFI peb feem ntau siv los nkag rau Is Taws Nem?
WIFI yog tus txheej txheem rau kev siv cov kev sib txuas lus wireless (yuav ua li cas sib tuav tes), thiab WIFI yog tus qauv rau WLAN. WIFI network ua haujlwm hauv 2.4G lossis 5G zaus band. Lwm yam
Sab nraud 3G / 4G kuj yog lub network wireless, tab sis cov txheej txheem sib txawv thiab tus nqi siab heev!
Virtual Local Area Network (VLAN)
Virtual LAN (VLAN) yog hais txog lub network thev naus laus zis uas tso cai rau cov chaw hauv lub network kom hloov pauv mus rau hauv cov txheej txheem sib txawv raws li kev xav tau, tsis hais lawv qhov chaw nyob ntawm lub cev.
Piv txwv li, cov neeg siv ntawm cov plag tsev sib txawv lossis hauv ntau lub tuam tsev tuaj yeem koom nrog sib txawv virtual LANs raws li xav tau: thawj pem teb tau muab faib ua 10.221.1.0 network ntu, thiab hauv pem teb thib ob muab faib ua
10.221.2.0 network ntu, thiab lwm yam.
Post lub sij hawm: Mar-19-2024
