802.11b ndidawunikira makina opanga ma WiFi opanda makina kuti asamalidwe ndi ogula. Ndi imodzi mwa akatswiri ambiri a Institute of Electrical and Electronics (IEEE) mu banja la 802.11 . Zogula 802.11b zinapangidwa osagwiritsidwa ntchito ndipo zimatulutsidwa ndi miyezo yatsopano ya 802.11g ndi 802.11n Wi-Fi.
Mbiri ya 802.11b
Mpaka zaka za m'ma 1980, kugwiritsa ntchito maulendo a pawailesi pafupifupi 2.4 GHz kunayendetsedwa ndi mabungwe a boma padziko lonse lapansi. Bungwe la Federal Communications Communication (FCC) linayambitsa kusintha kusokoneza gululi, lomwe linali loyambira pa zida zotchedwa ISM (mafakitale, sayansi, ndi zamankhwala). Cholinga chawo chinali kulimbikitsa chitukuko cha malonda.
Kumanga machitidwe osayendetsa opanda malonda pamlingo waukulu kumafuna zina mwazitsulo zamagetsi pakati pa ogulitsa. Apa ndi pamene IEEE inalowa ndikugawa gulu lake la ntchito 802.11 kuti likonze yankho, lomwe kenako linadziwika kuti Wi-Fi. Choyambirira cha 802.11 Wi-Fi, chofalitsidwa mu 1997, chinali ndi zolephera zambiri zogwiritsira ntchito kuti zikhale zothandiza kwambiri, koma zinapangitsa njira yopititsira patsogolo chikhalidwe chachiwiri chotchedwa 802.11b.
802.11b (masiku ano amatchedwa "B" mwachidule) anathandiza kuwunikira maulendo oyambirira opanda makina opanda pake. Ndikulengeza kwake mu 1999, opanga ma router broadband ngati Linksys anayamba kugulitsa ma Wi-Fi maulendo pamodzi ndi mafoni Ethernet mafoni omwe anali akuwulutsa kale. Ngakhale kuti zogulitsa zakalezi zingakhale zovuta kukhazikitsa ndi kuyendetsa, zosavuta komanso zomwe zinkasonyezedwa ndi 802.11b zinapangitsa Wi-Fi kukhala opambana kwambiri malonda.
Zochita 802.11b
Kugwirizana kwa 802.11b kumathandizira chiwerengero chapamwamba cha deta ya 11 Mbps . Ngakhale kuti ikufanana ndi Ethernet (10 Mbps) yachikhalidwe, B ikuyenda mofulumira kwambiri kuposa matebulo onse atsopano a Wi-Fi ndi Ethernet. Kuti mudziwe zambiri, onani - Kodi Kuthamanga Kwenikweni kwa Network 802.11b Wi-Fi ndi Chiyani?
802.11b ndi Kusakanikirana kwa Wopanda
Kutumiza m'magulu a maulendo a 2.4 GHz osayendetsedwa, 802.11b otumiza angayang'ane ndi mailesi kuchokera kuzinthu zina zopanda pakhomo monga mafoni opanda zingwe, mavunikiro a microwave, mawindo a garage, ndi ana oyang'anira.
802.11 ndi kumbuyo kwakumbuyo
Ngakhale makanema atsopano a Wi-Fi adakali kuthandizira 802.11b. Chifukwa chakuti mbadwo uliwonse watsopano wa miyezo yayikulu ya ma protocol ya Wi-Fi yakhala ikugwirizana ndi mibadwo yonse yapitayi: Mwachitsanzo,
- Mavoti 802.11g ndi mfundo zothandizira zimathandizira makasitomala G ndi B - otchedwa 802.11b / g ma intaneti
- Mavoti 802.11n ndi malingaliro othandizira othandizira N, G ndi B makasitomala - 802.11b / g / n ma intaneti
- Mavoti 802.11ac ndi mfundo zothandizira zothandizira makasitomala a AC, N, G ndi B - 802.11b / g / n / ac Intaneti
Izi zokhudzana ndi kumbuyo zikuwonetsa kuti Wi-Fi ikuyenda bwino, monga ogula ndi malonda amatha kuwonjezera zida zatsopano kumagulu awo ndipo pang'onopang'ono amachotsa zipangizo zakale ndi kusokonezeka kwakukulu.