Broadband vs Narrowband
Hauv kev sib txuas lus, band raug xa mus rau qhov ntau zaus (bandwidth) siv hauv cov channel. Nyob ntawm qhov loj ntawm lub band (nyob rau hauv cov nqe lus ntawm kHz, MHz los yog GHz), thiab ib co lwm yam khoom ntawm kev sib txuas lus channel, lawv yuav categorized li nqaimband, broadband thiab wideband thiab lwm yam. Nyob rau hauv cov ntaub ntawv kev sib txuas lus, bandwidth yog ntsuas nyob rau hauv cov nqe lus ntawm me ntsis. tus nqi (kbps, Mbps thiab lwm yam).
Narrowband
Hauv xov tooj cua, kev sib txuas lus nqaim tau tshwm sim nyob rau hauv ntau zaus, qhov twg cov lus teb zaus ntawm cov channel yog tiaj tus (qhov nce yog tas mus li rau tag nrho cov zaus hauv qhov ntau). Yog li ntawd, cov qhab yuav tsum me dua li qhov sib txuam bandwidth (qhov siab tshaj plaws ntawm ntau zaus qhov twg cov lus teb yog tiaj tus), thiab kuj me dua li qhov dav dav (lossis wideband), qhov twg cov lus teb channel tsis tas yuav tiaj tus.
Hauv cov ntaub ntawv kev sib txuas lus (lossis kev sib txuas hauv internet), nqaim band raug xa mus rau tus nqi ntawm cov ntaub ntawv raug xa mus hauv ib ob (lossis me ntsis ib ob). Dial-up internet sib txuas (qhov twg cov ntaub ntawv tus nqi tsawg dua 56 kbps) yog nyob rau hauv qeb nqaim hauv internet. Hauv kev sib txuas hauv xov tooj, khoos phis tawj txuas nrog internet los ntawm modem thiab xov tooj cables.
Broadband
Hauv xov tooj cua sib txuas lus, broadband muaj lub ntsiab lus zoo sib xws rau kev dav dav, uas muaj ntau zaus ntau dua piv rau qhov nqaim. Feem ntau, broadband ntau tshaj qhov sib txuam bandwidth, thiab yog li ntawd tsis muaj cov lus teb ncaj nraim. Broadband yog ib tug txheeb ze lub sij hawm, thiab qhov luaj li cas ntawm band tej zaum yuav nyob rau hauv kHz, MHz los yog GHz nyob ntawm daim ntawv thov.
Rau kev sib txuas hauv is taws nem, lo lus 'broadband' piav qhia tus nqi ntawm cov ntaub ntawv sib txuas. Feem ntau, kev sib txuas lus dav dav muaj ntau dua bandwidth, hauv Mbps ntau, piv rau qhov nqaim. DSL (Digital Subscriber Line) technologies (xws li ADSL thiab SDSL), HSDPA (High Speed Download Packet Access), WiMAX (Worldwide Interoperability for Microwave Access) yog cov piv txwv rau broadband internet technologies.
Qhov txawv ntawm Broadband thiab Narrowband yog dab tsi?
1. Narrowband kev sib txuas lus siv ntau zaus me me (bandwidth) piv rau kev sib txuas lus broadband.
2. Hauv kev siv internet, broadband technologies muab cov ntaub ntawv ntau dua nyob rau hauv cov nqe lus ntawm Mbps, qhov kev sib txuas nqaim muab cov ntaub ntawv qeeb qeeb xws li 56 kbps.
3. Hauv kev sib txuas lus hauv xov tooj cua, bandwidth yog me dua qhov sib txuam bandwidth ntawm cov channel rau nqaim band, thiab dav dua rau broadband.
