802.11a Ukunxibelelana ngeN Wireless kwi-Glance
I-802.11a yenye yeyokuqala ye-802.11 ye- Wi-Fi imigangatho yokunxibelelana eyenziwe kwi- IEEE 802.11 yentsapho yokuziphatha .
I-802.11a idlalwa ngokubhekiselele kwiminye imigangatho efana ne-802.11a, i-802.11b / g / n, ne- 802.11ac . Ukwazi ukuba bahluke kakhulu xa kuthengwa i-router entsha okanye udibanisa iifowuni ezintsha kwintanethi endala engasayi kuxhasa iteksi entsha.
Qaphela: i- 802.11a iteknoloji engenazintambo ayifanele idideke kunye ne-802.11ac, umgangatho omtsha kunye nomgangatho ophezulu.
802.11a Imbali
Inkcazo ye-802.11a yavunyelwa ngo-1999. Ngelo xesha, enye i-teknoloji ye-Wi-Fi eyayibuyiselwa kwiimarike yayiyi- 802.11b . I- 802.11 yangaphambili ayifumananga ukuthunyelwa ngokubanzi ngenxa yesantya esicothayo.
I-802.11a kunye neminye imigangatho ayihambisani, oku kuthetha ukuba amadivaysi angama-802.11a akakwazanga ukuthetha kunye nezinye iindidi, nangona kunjalo.
Inethiwekhi ye-Wi-Fi ye-802.11a isekela ubuninzi bee- bandwidth ezingama-54 Mbps , ezibhetele kangcono kwi-11 Mbps ye-802.11b kwaye kunye neyiphi i- 802.11g eya kuqala ukunikela iminyaka embalwa kamva. Ukusebenza kwe-802.11a kwenza iteknoloji ekhangayo, kodwa ukuphumeza loo nqanaba yentsebenzo efunekayo usebenzisa i-hardware ebiza kakhulu.
I-802.11a yafumana ukuthotyelwa kwamanye amazwe kwiindawo zokunxibelelana kwintsebenziswano apho iindleko zazingekho mbambano. Okwangoku, i-802.11b kunye nesebenziswano zokuqala zasemakhaya zaqhutyelwa ekuthandeni ngexesha elifanayo.
I-802.11b kunye ne-802.11g (802.11b / g) amanxibelelwano alawulwa kweli shishini kwiminyaka embalwa. Abanye abavelisi bakhelwe izixhobo zombini kunye nee-radios ezidibeneyo ukwenzela ukuba bakwazi ukuxhasa imilinganiselo ebizwa ngokuba yi / / b / g, nangona ezi zinto zazingekho zifana nje ezimbalwa.
Ekugqibeleni, i-Wi-Fi ye-802.11a ikhutshwe kwiimarike ngokubhekiselele kumgangatho omtsha ongenazintambo.
802.11a kunye nokuSayina okungenaWindows
Abalawuli baseburhulumenteni base-US kwiminyaka yee-1980 bavula iintlobo ezintathu zee-wireless frequency for the use of the public - 900 MHz (0.9 GHz), 2.4 GHz, kunye no-5.8 GHz (ngezinye ii-5 GHz). I-900 MHz ibonakaliswe kakhulu kwixesha elide ukuze libe luncedo ekunxibelelaneni kwedatha, nangona iifowuni ezingenanto zingayisebenzisa ngokubanzi.
I-802.11a idlulisela iimpawu zomsakazo nge- wireless spectrum kwi-5.8 GHz. Eli bhanki lalawulwa e-US nakumazwe amaninzi ixesha elide, oku kuthetha ukuba amanethiwekhi angama-802.11a we-Wi-Fi awazange aqalane nokuphazamiseka kwesignali kwezinye iindidi zokuthumela izixhobo.
Iinqununu ezingama-802.11b zisebenzisa ii-frequencies kwi-intanethi ye-2.4 yeGHz engaqhelekanga kwaye yayinokungaphazamiseka kamsasa kwezinye iifowuni.
Imiba eneenethiwekhi ezingama-802.11a ze-Wi-Fi
Nangona inceda ekuphuculeni ukusebenza kwenethiwekhi nokunciphisa ukuphazamiseka, uhla lwamanqaku we-802.11a lwalucaciswe ngokusetyenziswa kwamafremu ama-5 eGHz. I-802.11a yokungena kwendawo yokuthumela i-transmitter ingafaka ngaphantsi kwesine-yesine indawo enokulinganisa nayo iyunithi ye-802.11b / g.
Izindonga zezitena kunye nezinye izithintelo zithintela amanethiwekhi angama-wireless angama-802.11a kwizinga elingaphezulu kunokuba zifana neenethiwekhi ezingama-802.11b / g.