I-802.11b yiyokuqala kwe-Wi-Fi wireless network yokuxhumana kwenethiwekhi ukuthola inzuzo yokutholwa kwabantu nabathengi. Ngenye yezindinganiso eziningi ze- Institute of Electrical and Electronics (IEEE) emndenini wakwa- 802.11 . Imikhiqizo engu-802.11b yenziwe ingasebenzi futhi ihlukaniswe ngama- 802.11g kanye nama- 802.11n ama- Wi-Fi amazinga.
Umlando we-802.11b
Kuze kube phakathi neminyaka yama-1980, ukusetshenziswa kwesikhala somsakazo we-2.4 GHz kwakulawulwa yi-ejensi kahulumeni emhlabeni jikelele. I-US Federal Communications Communication (FCC) iqalile ushintsho ukuhlukanisa leli bhanti, elilinganiselwe ekuthiwa yi-ISM (izimboni, izisayense, nezokudokotela). Umgomo wabo kwakuwukugqugquzela ukuthuthukiswa kwezicelo zezohwebo.
Ukwakha izinhlelo ze-wireless zezohwebo ezingeni elikhulu kudinga ezinye zezinga lobuchwepheshe lobuchwepheshe phakathi kwabadayisi. Yilapho i-IEEE ingene khona futhi yanikeza iqembu layo labasebenzi abangu-802.11 ukuklama isisombululo, ekugcineni saziwa ngokuthi i-Wi-Fi. Isimiso sokuqala se-802.11 se-Wi-Fi, eshicilelwe ngo-1997, sasinemikhawulo eminingi kakhulu kwezobuchwepheshe yokuba iyasebenza kakhulu, kodwa yalungisa indlela yokuthuthukiswa kwesilinganiso sesizukulwane sesibili esibizwa nge-802.11b.
I-802.11b (namuhla ebizwa ngokuthi "B" okwesikhashana) yasiza ukuqala umvuthwandaba wokuqala wezintambo zokuxhumana ezingenantambo. Ngesethulo sawo ngo-1999, abakhiqizi bezindlela zokuxhumana eziphezulu njenge-Linksys baqala ukuthengisa amabhayisikobho e-Wi-Fi eceleni kwamamodeli e- Ethernet aphethwe yi- Ethernet ngaphambili. Nakuba le mikhiqizo endala ingaba nzima ukusetha nokuphatha, ukulula nokubonakala okungaboniswa ngu-802.11b kwenze i-Wi-Fi ibe yimpumelelo enkulu yezohwebo.
Umsebenzi we-802.11b
Ukuxhumeka kwe-802.11b kusekela isilinganiso sezinga eliphezulu sedatha ye-11 Mbps . Nakuba kuqhathaniswa ne- Ethernet yendabuko (10 Mbps), B yenza kancane kakhulu kunabo bonke ubuchwepheshe obusha be-Wi-Fi ne-Ethernet. Ukuze uthole okwengeziwe, bheka - Uyini Isivinini Sempela Senethiwekhi ye-Wi-Fi ye-802.11b ?
I-802.11b nokungafani okungenantambo
Ukudlulisela ebangeni lobubanzi be-2.4 GHz elingavunyelwe, abathumeli abangu-802.11b bangabhekana nokuphazamiseka komsakazo kusuka eminye imikhiqizo yasendlini engenazintambo njengama-wireless cordless, ama-ovens microwave, ama-openers door door, nabantwana abaqaphi.
I-802.11 ne-Backward Compatibility
Ngisho namanethiwekhi omusha we-Wi-Fi asesekela i-802.11b. Kungenxa yokuthi isizukulwane ngasinye esisha sezindinganiso eziyinhloko ze-Wi-Fi protocol sigcine ukuhambisana okubuyela emuva nazo zonke izizukulwane zangaphambilini: Isibonelo,
- Ama- router angu- 802.11g namaphoyinti okufinyelela ukufinyelela kokubili amaklayenti we-G no-B - abizwa ngamanethiwekhi we- 802.11b / g
- Ama-router angu-802.11n namaphoyinti wokufinyelela asekela ama-N, G no-B amaklayenti - amanethiwekhi we- 802.11b / g / n
- Ama-router angu-802.11ac namaphoyinti okufinyelela asekela amaklayenti e-AC, N, G kanye no- 802.11b / g / n / ac
Lesi sici sokuvumelanisa emuva siphumelele kakhulu ekuphumeleleni kwe-Wi-Fi, njengoba abathengi namabhizinisi bangakwazi ukwengeza imishini emisha kumanethiwekhi abo bese kancane kancane baphume amadivaysi amadala ngokuphazanyiswa okulinganiselwe.