Nug: 802.11 yog dab tsi? Cov txheej txheem wireless twg uas kuv cov khoom siv yuav tsum siv?
Teb:
802.11 yog txheej txheem thev naus laus zis rau cov khoom siv wireless network. Cov qauv no tau txiav txim siab los ntawm IEEE (Lub Tsev Haujlwm Hluav Taws Xob thiab Hluav Taws Xob Hluav Taws Xob), thiab lawv pib tswj hwm qhov sib txawv ntawm cov khoom siv wireless tsim thiab lawv sib txuas lus li cas.
Koj yuav pom 802.11 hais thaum koj tab tom nrhiav yuav lub wireless-enabled ntaus ntawv lossis ib qho khoom siv wireless. Thaum tshawb fawb txog dab tsi netbook yuav, piv txwv li, koj yuav pom qee qhov tshaj tawm tias kev sib txuas lus wirelessly ntawm "ultra-high" 802.11 speeds (qhov tseeb, Apple touts nws siv 802.11n thev naus laus zis hauv nws cov khoos phis tawj thiab cov khoom siv tshiab kawg). Tus qauv 802.11 kuj tau hais hauv cov lus piav qhia ntawm wireless network lawv tus kheej; Piv txwv li, yog tias koj xav txuas mus rau pej xeem wireless hotspot, tej zaum koj yuav raug qhia tias nws yog 802.11 g network.
Cov ntawv txhais li cas?
Tsab ntawv tom qab "802.11" qhia txog kev hloov kho rau tus qauv 802.11 qub. Wireless technology rau cov neeg siv khoom / cov pej xeem tau nce qib ntawm 802.11a rau 802.11b rau 802.11g rau, tsis ntev los no, 802.11n. (Yog lawm, lwm cov ntawv, "c" thiab "m," piv txwv li, kuj muaj nyob hauv 802.11 spectrum, tab sis lawv tsuas yog cuam tshuam rau IT engineers lossis lwm pab pawg neeg tshwj xeeb.)
Yog tsis tau nkag mus rau hauv cov ncauj lus kom ntxaws ntxiv ntawm 802.11a, b, g, thiab n tes hauj lwm, peb tuaj yeem hais dav dav tias txhua tus tshiab ntawm 802.11 muaj kev txhim kho wireless network kev ua tau zoo, piv rau cov qauv ua ntej, hais txog:
- tus nqi ntaub ntawv: cov ntaub ntawv siab tshaj plaws hloov pauv ceev (piv txwv li, cov ntaub ntawv ceev npaum li cas tuaj yeem hla lub wireless network)
- ntau: qhov kev ncua deb ntawm cov teeb liab wireless tuaj yeem ncav cuag lossis dav npaum li cas ntawm thaj chaw lub wireless teeb liab npog (piv txwv li, koj tuaj yeem nyob deb npaum li cas los ntawm lub teeb liab wireless thiab tseem muaj kev sib txuas ruaj ntseg)
802.11n (tseem hu ua "Wireless-N"), yog qhov tseeb wireless raws tu qauv, muab cov ntaub ntawv ceev tshaj plaws tshaj plaws hnub no thiab cov teeb liab zoo dua li cov thev naus laus zis ua ntej. Qhov tseeb, ua qauv qhia nrawm rau 802.11n cov khoom lag luam tau 7 zaug sai dua 802.11g; ntawm 300 lossis ntau dua Mbps (megabits ib ob) hauv kev siv lub ntiaj teb tiag tiag, 802.11n yog thawj wireless raws tu qauv rau kev sib tw wired 100 Mbps Ethernet teeb tsa.
Wireless-N cov khoom lag luam kuj tau tsim los ua kom zoo dua ntawm qhov deb dua, yog li lub laptop tuaj yeem nyob 300 ko taw deb ntawm lub teeb liab nkag mus rau wireless thiab tseem tuav cov ntaub ntawv sib kis ceev. Los ntawm qhov sib piv, nrog cov txheej txheem qub, koj cov ntaub ntawv ceev thiab kev sib txuas zoo li yuav tsis muaj zog thaum koj nyob deb ntawm qhov chaw nkag mus rau wireless.
kab hauv qab
Nws siv xya xyoo kom txog rau thaum 802.11n raws tu qauv tau pom zoo los ntawm IEEE thaum lub Cuaj Hlis 2009. Lub sijhawm xya xyoo uas tus txheej txheem tseem tab tom ua haujlwm, ntau "pre-n" thiab "draft n "cov khoom siv wireless tau qhia, tab sis lawv nyiam ua haujlwm tsis zoo nrog rau lwm cov kev cai wireless lossis lwm yam khoom uas tau pom zoo ua ntej 802.11n.
Kuv puas yuav tau daim npav Wireless-N network / nkag mus / lub khoos phis tawj nqa tau, thiab lwm yam?
Tam sim no tias 802.11n tau pom zoo - thiab vim tias cov pab pawg kev lag luam wireless zoo li Wi-Fi Alliance tau thawb rau kev sib raug zoo ntawm 802.11n thiab 802.11 cov khoom lag luam - qhov pheej hmoo ntawm kev yuav khoom siv tsis tuaj yeem sib txuas lus nrog ib leeg lossis nrog cov khoom qub qub tau txo qis heev.
Cov txiaj ntsig kev ua tau zoo ntawm 802.11n yog qhov tsim nyog saib, tab sis nco ntsoov cov lus qhia hauv qab no / cov lus qhia thaum txiav txim siab seb puas yuav lo nrog ntau siv 802.11g raws tu qauv lossis nqis peev hauv 802.11n tam sim no:
- Network kev ua tau zoo yuav zoo tshaj plaws thaum txhua yam ntawm cov khoom siv ntawm lub wireless network siv 802.11n thev naus laus zis. Nyob rau sab ntxeev, yog tias cov cuab yeej qub siv 802.11g lossis 802.11b txuas rau koj 802.11n-based router, qhov ceev thiab cov ntaub ntawv tus nqi ntawm tag nrho cov khoom siv hauv lub network yuav txo qis. Ib txoj hauv kev kom tau txais qhov teeb meem no rau koj lub tsev wireless network yog kom tau qhov hu ua dual-band router lossis nkag mus. Qhov no yuav tso cai rau cov cuab yeej qub khiav dhau ib zaus band (2.4 GHz) thiab cov khoom siv tshiab 802.11n-raws li siv lwm zaus band (5 GHz).
- Saib rau cov khoom siv network uas nyuam qhuav tsim tawm, uas yuav muaj peev xwm ua tau raws li tus qauv pom zoo 802.11n. Tsis txhob "pre-n" lossis "draft n" cov khoom.
- Keem saib cov khoom lag luam uas tau lees paub los ntawm Wi-Fi Alliance (lawv yuav muaj Wi-Fi CERTIFIED logo ntawm lawv lub ntim), vim tias cov khoom no raug kuaj rau kev sib raug zoo thiab kev sib cuam tshuam.
- Thaum kawg, nco ntsoov tias feem ntau cov pej xeem wireless hotspots thiab wireless tes hauj lwm feem ntau muaj feem ntau yuav khiav 802.11g lossis txawm b. Txawm hais tias koj lub cuab yeej tshiab 802.11n yog rov qab-tshaj nrog (piv txwv li, tuaj yeem ua haujlwm ntawm) cov tes hauj lwm no, nws yuav ua li ntawd ntawm qhov qeeb qeeb g lossis b nrawm.
FAQ
Ntau qhov chaw nyob muaj nyob hauv 802.11 ncej?
Muaj plaub qhov chaw nyob MAC hauv 802.11 ncej. Lawv tau siv los txheeb xyuas cov kev pabcuam yooj yim teeb tsa (BSSID), qhov chaw nyob (SA), qhov chaw nyob (DA), xa xov STA chaw nyob (TA), thiab tau txais STA chaw nyob (RA).
Qhov broadband wireless technology yog raws li tus qauv 802.11?
Wi-Fi yog raws li 802.11 IEEE network tus qauv.
Qhov twg 802.11 tus qauv yog thawj zaug siv 5 GHz band?
Tus qauv 802.11a tau luam tawm xyoo 1999 thiab siv 5 GHz band nrog cov ntaub ntawv siab tshaj plaws ntawm 54 Mbit / s.
