Lub sij hawm latency hais txog qee hom ntawm ntau yam kev qeeb raws li tau tsim hauv kev ua cov ntaub ntawv network. Qhov qis latency network txuas yog ib qho uas ua rau me me ncua sij hawm, thaum muaj kev sib txuas kev siab tshaj plaws ntawm kev qeeb ntev.
Tsis tas li ntawd, cov lus qhia qis qis qis qis qis qee zaum yuav kis tau qeeb qeeb (cov khoom nruab nrab ntawm lub cev) thiab ua qeeb qeeb (xws li mus dhau ntawm cov npe tso cai lossis ua haujlwm qw hauv internet).
Txawm hais tias kev xaav ntawm kev ceev ceev thiab kev ua haujlwm feem ntau tsuas yog to taub tias bandwidth , latency yog lub ntsiab tseem ceeb. Txawm li cas los, txij li tus neeg nruab nrab mas paub zoo dua txog lub tswv yim ntawm bandwidth, vim nws yog ib qhov tshaj tawm los ntawm cov tuam txhab ntawm cov khoom siv network, latency matters ncaj qha mus rau qhov kawg neeg siv.
Latency thiab Kev Nkag Siab
Txawm hais tias qhov theoretical peak bandwidth ntawm kev sib txuas hauv lub network yog tsau raws li cov tshuab siv, qhov nqi ntawm cov ntaub ntawv uas faib tawm nws (hu ua kev sib tw ) txawv cov sij hawm thiab cuam tshuam los ntawm ntau dua thiab qis latencies.
Ntev li ntawm latency tsim cov kev lag luam uas tiv thaiv tau cov ntaub ntawv los ntawm kev sau cov yeeb nkab, qhov no txo qis los ntawm kev siv thiab limiting ntau qhov zoo ntawm txoj kab txuas.
Tej yam teeb meem ntawm latency ntawm lub network siv tau yog ib ntus (kav ntev li ob peb feeb) los sis tsis tuaj yeem (tsis tu ncua) nyob ntawm qhov chaw ntawm qeeb.
Latency Kev Siv Internet, Software, thiab Devices
Txog DSL lossis cable txuas hauv internet, latencies ntawm tsawg dua 100 milliseconds (ms) raug thiab tsawg dua 25 ms feem ntau tau. Nrog satellite kev sib txuas hauv internet , ntawm qhov tod tes, cov latencies raug 500 ms lossis siab dua.
Ib qho kev pab cuam hauv internet ntawm 20 Mbps tuaj yeem ua phem tshaj li qhov kev pab cuam uas nyob ntawm 5 Mbps yog tias nws khiav qeeb siab.
Cov kev qhia hauv satellite ua qauv qhia txog qhov sib txawv ntawm latency thiab bandwidth ntawm computer networks. Satellite muaj ob qho tib si ntawm high bandwidth thiab siab latency. Thaum thau qhov webpage, piv txwv li, feem ntau cov neeg siv xov xwm hauv satellite tuaj yeem pom zoo ncua ntev thaum lub sij hawm lawv nkag mus rau qhov chaw nyob rau lub sij hawm nplooj ntawv pib.
Qhov siab latency no yog vim feem ntau rau kev tso tawm qeeb raws li qhov kev thov xov mus ncig ntawm kev khiav ntawm lub teeb mus rau qhov chaw nres tsheb nyob deb hauv tsev thiab rov qab mus rau lub tsev network . Thaum cov lus nyob rau hauv Lub Ntiaj Teb, li cas los xij, nplooj ntawv ceev nrawm zoo li lwm cov kev sib txuas hauv internet (xws li DSL lossis cable internet).
WAN latency yog lwm hom latency uas tuaj yeem tshwm sim thaum lub network yog tsis khoom rau kev khiav tsheb mus rau qhov chaw uas lwm qhov kev thov tau qeeb vim txij li qhov kho vajtse tsuas yog tsis tuaj yeem ua txhua yam ntawm max max. Qhov no cuam tshuam rau lub wired network dhau lawm vim hais tias tag nrho lub network yog kev khiav hauj lwm ua ke.
Ib qho yuam kev lossis lwm yam teebmeem nrog kho vajtse yuav ua rau lub sijhawm nws siv sijhawm los nyeem cov ntaub ntawv, uas yog lwm qhov laj thawj rau latency. Qhov no tej zaum yog rooj plaub ntawm lub network khoom lag luam los yog txawm tias lub cuab yeej kho mob, zoo li lub zog qeeb uas yuav siv sij hawm los khaws los yog muab cov ntaub ntawv.
Tus software uas khiav hauv lub tshuab yuav ua rau mob qis heev. Qee qhov kev pabcuam antivirus soj ntsuam tag nrho cov ntaub ntawv uas tau ntws tawm hauv thiab tawm ntawm lub computer, uas yog lub hauv paus qee zaum muaj qee cov kev tiv thaiv computers qeeb dua lawv cov khub. Cov ntaub ntawv soj ntsuam feem ntau yog torn sib nrug thiab luam ua ntej nws tuaj yeem usable.
Ntsuas Network Latency
Cov cuab yeej xws li ping tests thiab traceroute ntsuas latency los txiav txim lub sijhawm nws yuav siv lub pob ntawv pabcuam xa kom tawm ntawm qhov chaw mus rau qhov chaw, thiab rov qab - hu ua round-trip time .
Lub sij hawm Round-trip tsis yog tib txoj kev ntsuas latency tab sis nws yog qhov ntau tshaj.
Kev Ua Haujlwm Zoo (QoS) ntawm lub tsev thiab cov lag luam kev lag luam yog tsim los pab tswj ob qhov kev siv bandwidth thiab latency ua ke kom muaj kev kawm zoo sib xws.