I-802.11a Inethiwekhi Engenantambo Engenhla
I-802.11a ingenye yamazinga wokuxhumana we-Wi-Fi wokuqala angu-802.11 adalwe emndenini wamazinga we- IEEE 802.11 .
I-802.11a ivame ukukhulunywa ngokuphathelene namanye amazinga afana no-802.11a, 802.11b / g / n, no- 802.11ac . Ukwazi ukuthi bahlukile kusebenza ngokukhethekile uma uthenga router entsha noma uxhumanisa amadivaysi amasha kunethiwekhi endala ngempela engase ingasekeli tech entsha.
Qaphela: Ubuchwepheshe obungenazintambo buka-802.11a akufanele budideke no-802.11ac, izinga elisha kakhulu futhi eliphambili kakhulu.
Umlando we-802.11a
Ukucaciswa kwe-802.11a kwavunyelwa ngo-1999. Ngaleso sikhathi, ukuphela kobuchwepheshe be-Wi-Fi kuphela obubekwe emakethe kwakungu- 802.11b . I- 802.11 yangempela ayitholanga ukuthunyelwa okubanzi ngenxa yejubane layo elincane kakhulu.
I-802.11a nalezi ezinye izindinganiso azihambisani, okusho ukuthi amadivayisi angu-802.11a akakwazanga ukuxhumana nezinye izinhlobo, futhi ngokufanayo.
Inethiwekhi ye-Wi-Fi engu-802.11a isekela ukuphakama kwe- bandwidth yama-54 Mbps , okungcono kakhulu kunezingu-11 Mbps ze-802.11b futhi ngokuhambisana nokuthi yi- 802.11g ezoqala ukunikeza iminyaka embalwa kamuva. Ukusebenza kwe-802.11a kwenzeni ubuchwepheshe obukhangayo, kodwa ukufeza lelozinga lokusebenza elidingekayo besebenzisa i-hardware ebiza kakhulu.
I-802.11a yathola ukutholwa kweminye ezindaweni zenethiwekhi ezinkampani lapho izindleko zazingekho inkinga. Phakathi naleso sikhathi, i-802.11b kanye nokuxhumana kwasekhaya kwasekuqaleni kwaqhuma ekuthandeni ngesikhathi esifanayo.
Ama-802.11b kanye nama-802.11g (802.11b / g) amanethiwekhi alawula imboni eminyakeni embalwa. Abanye abakhiqizi bakhela amadivaysi omabili ama-A no-G ahlanganiswe ukuze bakwazi ukusekela noma yikuphi okujwayelekile okuthiwa yi-a / b / g amanethiwekhi, nakuba lawa angavamile kakhulu njengambalwa amadivayisi alayishe akhona.
Ekugcineni, i-Wi-Fi engu-802.11a ikhishwe emakethe ngokuqondene namazinga amasha angenawaya.
I-802.11a ne-Signal Wireless
Abalawuli bakahulumeni base-US eminyakeni yawo-1980 bavula amaqembu amathathu angenazintambo ezingenazintambo zokusetshenziswa komphakathi - 900 MHz (0.9 GHz), 2.4 GHz, no-5.8 GHz (ngezinye izikhathi kuthiwa yi-5 GHz). I-900 MHz ibonakele kakhulu imvamisa ukuze isebenzise ukuxhumana kwenethiwekhi, nakuba amafoni angenantambo ayisebenzisa kabanzi.
I-802.11a idlulisela izignali zomsakazo we- spectrum ezingenazintambo ku-5.8 GHz ibanga lemvamisa. Leli band lilawulwa e-US nakwamanye amazwe isikhathi eside, okusho ukuthi amanethiwekhi akwa-802.11a we-Wi-Fi awadingeki aphikisana nokuphazanyiswa kwesignali kusuka kwezinye izinhlobo zamadivayisi okudlulisa.
Ama-802.11b amanethiwekhi asetshenziselwa ama frequencies kumkhawulo wama-2.4 we-GHz ongavunyelwe njalo futhi ayengakwazi ukuphazamiseka komsakazo kwamanye amadivayisi.
Izinkinga Ngezinethiwekhi Zama-Wi-Fi angu-802.11a
Yize kusiza ukuthuthukisa ukusebenza kwenethiwekhi nokunciphisa ukuphazamiseka, ibanga lesignali ye-802.11a lilinganiselwe ukusetshenziswa kwamafremu ama-5 GHz. I-802.11a yokudlulisela iphuzu lokufinyelela lingase limboze ngaphansi kweyodwa-yesine indawo yendawo efana ne-802.11b / g.
Izindonga zezitini kanye nezinye izivimbela zithinta amanethiwekhi angenantambo angama-802.11a ngokwezinga elikhulu kunezilinganiso ezingafaniswa nama-802.11b / g.