3G vs Wifi (IEEE 802.11)
3G thiab Wi-nkaus (Wireless Fidelity) yog ob qho tib si wireless nkag siv thev naus laus zis ua haujlwm hauv ntau zaus thiab nkag mus rau ntau yam. Wi-Fi tsuas yog tuaj yeem mus txog 250 meters thiab 3G kev pab them nqi tuaj yeem mus dhau Kilometers. Yeej Wi-Fi yog tus kheej wireless LAN siv nyob rau hauv luv luv nrog cov nqi teeb tsa qis thaum 3G ib txwm siv los ntawm cov tswv txawb hauv lub suab thiab wireless broadband tes hauj lwm. Wi-Fi ua haujlwm nyob rau hauv siab zaus yog li cov ntaub ntawv tus nqi yog theoretically siab li 54 Mbits / s thiab 3G tuaj yeem mus txog 14 Mbits / s, hauv qhov kev nkag siab Wi-Fi sai dua 3G. Koj tuaj yeem nkag tau Is Taws Nem nrog 3G thiab Wi-Fi (Yog tias nws muaj kev nkag mus rau backhaul internet).
3G (Third Generation Networks)
3G yog lub tshuab siv wireless hloov pauv 2G tes hauj lwm. Qhov txiaj ntsig tseem ceeb ntawm 3G yog tias nws nrawm dua 2G tes hauj lwm. Smart mobile handsets yog tsim tsis tsuas yog rau lub suab hu, tab sis kuj rau kev siv Internet thiab mobile daim ntaub ntawv. 3G tes hauj lwm tso cai rau ib txhij lub suab thiab cov ntaub ntawv kev pab cuam nrog ceev variation ntawm 200 kbit / s thiab yog hais tias nws tsuas yog cov ntaub ntawv nws yuav xa ob peb Mbit / s. (Mobile Broadband)
Ntau 3G thev naus laus zis tau siv tam sim no thiab qee qhov ntawm lawv yog EDGE (Txhim kho cov ntaub ntawv tus nqi rau GSM Evolution), los ntawm CDMA tsev neeg EV-DO (Evolution-Data Optimized) uas siv Code Division Multiple Access lossis Time Division Multiple Access rau multiplexing, HSPA (High Speed Packet Access) uas siv 16QAM modulation txheej txheem (Quadrature Amplitude Modulation) thiab ua rau cov ntaub ntawv tus nqi ntawm 14 Mbit / s downlink thiab 5.8 Mbit / s uplink speeds) thiab WiMAX (Wireless Interoperability rau Microwave Access - 802.16).
Wi-Fi (IEEE 802.11 tsev neeg)
Wireless Fidelity (Wi-Fi) yog wireless LAN thev naus laus zis uas tuaj yeem siv luv luv. Nws yog cov cuab yeej siv wireless tshaj plaws siv hauv tsev, Hotspots thiab koom nrog hauv wireless networks. Wi-Fi ua haujlwm hauv 2.4GHz lossis 5GHz uas tsis muaj kev faib tawm zaus (Tshwj xeeb faib rau ISM - Muaj Kev Tshawb Fawb thiab Kho Mob). Wi-Fi (802.11) muaj ob peb ntau yam thiab qee qhov ntawm lawv yog 802.11a, 802.11b, 802.11g thiab 802.11n. 802.11a, b, g ua haujlwm nyob rau hauv 2.4 GHz zaus thiab nyob rau hauv ib thaj tsam ntawm 40-140 meters (nyob rau hauv kev muaj tiag) thiab 802.11n ua hauj lwm nyob rau hauv 5 GHz nrog OFDM modulation technology yog li ua rau siab dua (40Mbits / S nyob rau hauv kev muaj tiag) thiab ranged rau 70-250 m.
Peb tuaj yeem teeb tsa Wireless LAN (WLAN) hauv tsev nrog Wireless Routers. Thaum koj teeb tsa Wi-Fi hauv tsev kom paub tseeb tias koj ua kom muaj kev ruaj ntseg ntawm nws kom tsis txhob muaj 3rd tog nkag. Ob peb ntawm lawv yog, Ruaj Ntseg Wireless lossis Encryption, MAC chaw nyob lim thiab ntau tshaj qhov no tsis txhob hnov qab hloov tus password qub ntawm koj lub router wireless.
Easy Setup Guide:
(1) Txuas lub Wi-Fi router rau lub zog
(2) Nquag Wi-Fi routers yog DHCP (Dynamic Host Control Protocol) tau qhib thiab nws yuav cia li muab IP rau koj cov khoom siv.
(3) Txuas koj lub laptop thiab teeb tsa Wi-Fi router nrog kev ruaj ntseg nta.
(4) Yog tias koj xav txuas rau Is Taws Nem, txuas Wi-Fi router rau cable, DSL lossis wireless internet.
(5) Tam sim no koj tuaj yeem luam theej duab thiab ntxiv koj lub wireless network rau txhua Wi-Fi pab kiag li lawm lossis Wi-Fi ua hauv cov khoom siv.
(6) Yog tias koj xav kom muaj kev ruaj ntseg ntxiv pab kom MAC lim thiab ntxiv koj cov khoom siv MAC chaw nyob hauv router kom tsis txhob muaj kev tso cai nkag.
Qhov txawv ntawm 3G thiab Wi-Fi (802.11)
(1) Ob leeg yog Wireless Access Technology rau ntau lub hom phiaj.
(2) Feem ntau cov neeg ua haujlwm tsuas yog xa 3G thiab Wi-Fi yog rau kev siv hauv tsev / tus kheej.
(3) 3G (3.5 G HSPA) tuaj yeem nce mus txog qhov ceev ntawm 14 Mbits / s thiab Wi-Fi tuaj yeem mus txog 54 Mbits / s
(4) Wi-Fi yog qhov luv luv wireless thev naus laus zis thiab 3G ntau yam hauv kilometers
(5) 3G txhawb ob lub suab thiab cov ntaub ntawv thiab Wi-Fi txhawb nqa cov ntaub ntawv xwb.
(6) Ob leeg 3G thiab Wi-Fi txhawb VoIP thiab Video Hu
