Umbuzo: Iyini i-802.11? Yimaphi ama-protocol angenantambo okufanele amadivayisi wami asebenzise?
Impendulo:
I-802.11 iyisethi yamazinga ezobuchwepheshe amadivayisi wenethiwekhi angenantambo. Lezi zindinganiso zinqunywe yi-IEEE (Institute of Electrical and Electronic Engineers), futhi ngokuyinhloko zilawula indlela amadivaysi ahlukene angenantambo aklanyelwe ngayo nokuthi axhumana kanjani.
Uzobona u-802.11 okushiwo uma ubheka ukuthenga idivayisi enikwe amandla engenantambo noma ucezu lwe-hardware engenawaya. Uma ucwaninga ukuthi iyiphi i-netbook yokuthenga, isibonelo, ungabona ezinye zikhangiswa njengezingxoxo ezingenazintambo kuma-ultra-high "802.11 n speed (eqinisweni, i-Apple ithinta ukusetshenziswa kwayo kobuchwepheshe be-802.11n kumakhompyutha wakamuva namadivayisi). Isimiso se-802.11 siphinde sichazwe ezinchazweni zamanethiwekhi angenantambo ngokwawo; isibonelo, uma ufuna ukuxhuma kwi-hotspot engenawashi yomphakathi, ungatshelwa ukuthi inethiwekhi ye-802.11 g .
Zisho ukuthini izinhlamvu?
Incwadi emva kwe- "802.11" ibonisa ukuchibiyela kumgangatho wokuqala we-802.11. Ubuchwepheshe obungenazintambo kubathengi / umphakathi jikelele uphuthukile kusuka ku- 802.11a kuya ku- 802.11b ukuya ku- 802.11g kuya, kunanda ku- 802.11n . (Yebo, ezinye izinhlamvu, "c" nethi "m," isibonelo, zikhona nendawo ye-spectrum engu-802.11, kodwa kuphela ngokuyinhloko kubanjiniyela be-IT noma amanye amaqembu akhethiwe abantu.)
Ngaphandle kokuthola ukwahlukana okuningiliziwe phakathi kwama-802.11a, b, g, kanye n amanethiwekhi, singakwazi ukufakazela ukuthi inguqulo entsha ye-802.11 inikeza ukusebenza kwenethiwekhi okungenazintambo, uma kuqhathaniswa nezinguqulo zangaphambili, ngokulandela:
- Isilinganiso sedatha : isivinini esikhulu sokudlulisa idatha (ie, ulwazi olusheshayo lungahamba kanjani ngenethiwekhi engenantambo)
- ububanzi : ibanga amasignali angenawaya angafinyeleleka noma ukuthi indawo evulekile isembozo esingenazintambo (ie, ukuthi ungaba kude kangakanani nomthombo wesignali ongenawo ucingo futhi ugcine uxhumano oluthembekile)
I-802.11n (eyaziwa nangokuthi "i-Wireless-N"), ebizwa ngokuthi i-protocol yangasese yamuva, inika izinga lokufinyelela eliphakeme kunazo zonke namuhla namasethingi wesignali angcono kunezobuchwepheshe zangaphambili. Eqinisweni, ukuvinjelwa kwemikhiqizo engu-802.11n kuye kwaba izikhathi ezingu-7 ngokushesha kune-802.11g; kuma-300 noma ngaphezulu ama-Mbps (ama-megabits ngomzuzwana) ekusetshenzisweni kwezwe langempela, i-802.11n yi-protocol yokuqala engenawaya kuya kunselele enkulu yathinta amasu we-Ethernet ayi-100 Mbps.
Imikhiqizo engenantambo-N nayo yaklanyelwe ukwenza ngcono ezindaweni ezikude, ukuze i-laptop ingaba ngamamitha angu-300 kude nesignali yokufinyelela engenazintambo futhi ihlale igcina isivinini esikhulu sokudlulisa idatha. Ngokuphambene nalokho, ngezivumelwano ezindala, isivinini sakho sedatha kanye nokuxhumeka kwedatha kubonakala buthakathaka uma ude kude nendawo yokufinyelela engenazintambo.
Ngakho kungani kungenjalo & # 39; wonke umuntu usebenzisa imikhiqizo ye-Wireless-N?
Kwathatha iminyaka eyisikhombisa kuze kube yilapho i-protocol ye-802.11n iqinisekiswa / ihlelwe yi-IEEE ngoSeptemba ka-2009. Phakathi naleyo minyaka eyisikhombisa lapho le protocol isasetshenziselwa khona, eziningi imikhiqizo engenazintambo "pre-n" ne "draft" , kodwa babevame ukungasebenzi kahle namanye ama-protocol noma ngaphandle kweminye imikhiqizo engu-802.11n.
Ingabe kufanele ngithenge i-wireless-N yenethiwekhi yenethiwekhi / iphuzu lokufinyelela / ikhompyutha ephathekayo, njll?
Manje ukuthi i-802.11n iye yaqinisekiswa - futhi ngoba amaqembu emisebenzi engenawaya afana ne-Wi-Fi Alliance aye esebenzela ukuhambisana phakathi kwemikhiqizo engu-802.11n nangaphezulu kuka-802.11 - ingozi yokuthenga amadivayisi angakwazi ukuxhumana nomunye noma omdala i-hardware iye yehliswa kakhulu.
Izinzuzo zokwenyuka kokusebenza kwama-802.11n zifaneleke ukubukeka, kodwa khumbula izingcingo ezilandelayo / izincomo uma unquma ukuthi unamathele ekusetshenzisweni kwe-802.11g kakhulu noma utshalwa imali ku-802.11n manje :
- Ukusebenza kwenethiwekhi kuyoba mkhulu kakhulu uma wonke amadivaysi enethiwekhi engenazintambo esebenzisa ubuchwepheshe be-802.11n. Ehlangothini le-flip, uma idivaysi endala esebenzisa i-802.11g noma i-802.11b ixhumeka kumzila wakho osuselwe ku-802.11n, izinga lokuvinjelwa kanye nedatha lazo zonke amadivaysi enethiwekhi kuzokwehla. Enye indlela yokuzungeza le nkinga ukuze inethiwekhi yakho engenazintambo ikwazi ukuthola lokho okubizwa ngokuthi i-roual-band router noma iphuzu lokufinyelela. Lokhu kuzovumela amadivaysi asebekhulile ukuba asebenze ngaphezu kweyodwa band band (2.4 GHz) namadivaysi esanda ku-802.11n asetshenziselwa ukusebenzisa enye ibhande lemvamisa (5 GHz).
- Bheka amadivaysi enethiwekhi asanda akhiqizwa, azoba nethuba elikhulu lokuhambisana nesilinganiso esiqinisekisiwe se-802.11n. Ngokuqinisekile ugweme imikhiqizo ye- "pre-n" noma "ye-draft n".
- Futhi qaphela imikhiqizo eqinisekisiwe yi-Wi-Fi Alliance (izoba ne-Wi-Fi CERTIFIED logo emaphaketheni abo), njengoba le mikhiqizo ihlolwe ukuhambisana nokusebenzisana.
- Okokugcina, khumbula ukuthi izindawo eziningi zokuxhumana ezingenazintambo kanye namanethiwekhi angenantambo ngokuvamile zikwazi ukuqhuba 802.11g noma b. Nakuba idivayisi yakho entsha engu-802.11n ibuyele emuva-iyahambisana (okungukuthi, ingasebenza) kula manethiwekhi, izokwenza kanjalo ngesivinini esisheshayo noma esisheshayo.