Ua ke nrog kev ua haujlwm yooj yim thiab kev ntseeg tau, kev ua haujlwm ntawm lub computer network txiav txim siab nws qhov txiaj ntsig tag nrho. Kev sib tw network ceev suav nrog kev sib koom ua ke ntawm kev sib cuam tshuam.
Network Speed yog dab tsi?
Koj xav kom koj cov tes hauj lwm khiav ceev hauv txhua qhov xwm txheej. Qee qhov xwm txheej, kev ncua hauv lub network yuav kav ntev li ob peb milliseconds thiab muaj kev cuam tshuam tsis zoo rau qhov koj tab tom ua. Hauv lwm qhov xwm txheej, kev ncua hauv lub network tuaj yeem ua rau qeeb qeeb. Cov xwm txheej uas tshwj xeeb tshaj yog rau cov teeb meem ceev network suav nrog
- sijhawm los tsim kev sib txuas tshiab
- sijhawm thauj cov nplooj ntawv web
- sijhawm rub tawm ib qho app, thaj chaw ua haujlwm, lossis lwm yam ntaub ntawv
- muaj peev xwm tshaj tawm cov ntsiab lus video rau lub sijhawm ntev yam tsis muaj kev cuam tshuam
Lub luag haujlwm ntawm Bandwidth hauv Network Performance
Bandwidth yog qhov tseem ceeb hauv kev txiav txim siab ceev ntawm lub computer network. Cov neeg muab kev pabcuam tseem ceeb tshaj tawm cov qhab nia ntawm lawv cov kev pabcuam hauv internet hauv kev tshaj tawm cov khoom, yog li koj yuav paub ntau npaum li cas koj muaj thiab koj lub network router tuaj yeem ua haujlwm li cas.
Bandwidth hauv computer networking yog hais txog cov ntaub ntawv tus nqi txhawb los ntawm kev sib txuas hauv network lossis interface. Nws sawv cev tag nrho lub peev xwm ntawm kev sib txuas. Qhov muaj peev xwm ntau dua, qhov ua tau zoo dua yuav ua tau.
Bandwidth yog hais txog ob qho kev ntsuas theoretical thiab qhov tseeb dhau los, thiab nws tseem ceeb kom paub qhov txawv ntawm ob. Piv txwv li, tus qauv 802.11g Wi-Fi kev sib txuas muaj 54 Mbps ntawm qhov ntsuas bandwidth, tab sis hauv kev xyaum, nws ua tiav tsuas yog 50% lossis tsawg dua ntawm tus lej no.
Ib txwm Ethernet tes hauj lwm theoretically txhawb 100 Mbps lossis 1000 Mbps ntawm qhov siab tshaj plaws bandwidth, tab sis lawv tsis tuaj yeem tsim nyog ua tiav qhov nyiaj siab tshaj no. Cellular (mobile) tes hauj lwm feem ntau tsis thov ib qho kev ntsuas bandwidth, tab sis tib txoj cai siv. Kev sib txuas lus nyiaj siv ua haujlwm hauv computer hardware, network protocols, thiab operating systems tsav qhov sib txawv ntawm theoretical bandwidth thiab qhov tseeb throughput.
Ntsuas Network Bandwidth
Bandwidth yog tus nqi ntawm cov ntaub ntawv uas dhau los ntawm kev sib txuas hauv network dhau sijhawm raws li ntsuas hauv cov khoom ib ob (bps). Muaj ntau cov cuab yeej muaj rau cov thawj coj los ntsuas qhov bandwidth ntawm kev sib txuas hauv network. Ntawm LANs (hauv cheeb tsam network), cov cuab yeej no suav nrog Netperf thiab Test TCP. Hauv Is Taws Nem, muaj ntau qhov bandwidth thiab kev ntsuas ceev, thiab feem ntau yog dawb rau koj siv.
Txawm hais tias cov cuab yeej no ntawm koj qhov kev pov tseg, kev siv bandwidth nyuaj rau ntsuas qhov tseeb vim nws txawv raws lub sijhawm nyob ntawm kev teeb tsa ntawm cov khoom siv ntxiv rau cov yam ntxwv ntawm cov ntawv thov software, suav nrog lawv siv li cas.
About Broadband Speeds
Lo lus "siab bandwidth" feem ntau paub qhov txawv ntawm kev sib txuas hauv Is Taws Nem sai dua los ntawm kev hu xov tooj los yog xov tooj ntawm tes ceev. Cov ntsiab lus ntawm "siab" piv rau "qis" bandwidth sib txawv, thiab lawv tau hloov ntau xyoo raws li kev siv tshuab network tau txhim kho.
Nyob rau xyoo 2015, Tsoom Fwv Teb Chaws Kev Sib Txuas Lus (FCC) tau hloov kho lawv cov ntsiab lus ntawm kev sib txuas lus los ua cov kev sib txuas uas tau ntsuas tsawg kawg 25 Mbps rau rub tawm thiab tsawg kawg 3 Mbps rau uploads. Cov lej no tau cuam tshuam qhov nce ntxiv los ntawm FCC qhov tsawg kawg nkaus ntawm 4 Mbps nce thiab 1 Mbps nqis.
Bandwidth tsis yog tib yam uas ua rau pom kev ceev ntawm lub network. Lub ntsiab lus tsawg dua ntawm kev ua haujlwm hauv network - latency - kuj ua lub luag haujlwm tseem ceeb.
Latency hauv Broadband Speeds
Latency, uas tuaj yeem tshwm sim hauv qee qhov kev ntsuas nrawm li "ping," yog lub sijhawm nws siv cov ntaub ntawv xa tawm ntawm koj lub khoos phis tawj mus rau lub server thiab rov qab. Koj ntsuas nws hauv milliseconds. Ib qho ping zoo yog qis dua 10 ms. Ib tshaj 100 ms tuaj yeem ua rau muaj teeb meem, txawm li cas los xij, tshwj xeeb tshaj yog thaum koj tab tom ua yeeb yaj kiab lossis ua si hauv online. Lub latency siab tuaj yeem ua rau tsis muaj zog, hais lus tsis txaus siab, thiab qeeb qeeb (lossis "lag") uas cuam tshuam rau kev ua haujlwm.
