Igama le- latency libhekisela kunoma yiziphi izinhlobo eziningana zokulibaziseka okuvame ukuqhutshwa ekusetshenzisweni kwedatha yenethiwekhi. Ukuxhumeka kwenethiwekhi ye- latency ephansi yilabo abathola izikhathi ezincane zokulibazisa, kanti uxhumano oluphezulu lwe- latency lunezikhathi ezinzima zokulibala.
Ngaphandle kokubambezeleka kokusabalalisa, i-latency ingase ihileleke ukulibaziseka kokudlulisa (izakhiwo ze-medium medium) nokucubungula ukulibaziseka (njengokudlula amaseva we-proxy noma ukwenza ama- network hops ku-intanethi).
Yize ukuqonda kwejubane lenethiwekhi nokusebenza kuvame ukuqondwa kuphela njenge- bandwidth , i-latency yinye into ebalulekile. Kodwa-ke, njengoba umuntu ojwayelekile ejwayele umqondo wokuhamba komkhawulokudonsa, ngoba nguye okhangiswa abakhiqizi bemishini yenethiwekhi, izindaba ze-latency ngokulinganayo ekuhlangenwe nakho komsebenzisi wokuphela.
I-Latency vs. Throughput
Nakuba i-bandwidth yezintambo zokufinyelela kwenethiwekhi ehlelwe ngokuvumelana nobuchwepheshe obusetshenzisiwe, inani lemali elihambayo phezu kwalo (elibizwa ngokuthi i- throughput ) liyahlukahluka ngokuhamba kwesikhathi futhi lithinteka ekugcineni kwezinga eliphezulu.
I-latency eyedlulele yenza ama-bottlenecks avimbela idatha ekugcwaliseni ipayipi yenethiwekhi, ngaleyo ndlela inciphise ukungena nokunciphisa umkhawulokudonsa osebenzayo wokuxhumana.
Umthelela we-latency kwinethiwekhi ye-input ingaba yesikhashana (ihlala imizuzwana embalwa) noma iphikelela (njalo) kuye ngokuthi umthombo wokulibaziseka.
I-Latency yezinsizakalo ze-intanethi, i-Software, namadivayisi
Kuxhumano lwe-DSL noma intambo ye-intanethi, ama-latencies angaphansi kwamamitha ayi-100 e-millisecond (ms) ajwayelekile futhi angaphansi kuka-25 ms ngokuvamile avunyelwe. Njengoba uxhumano lwe- satellites lwe- intanethi , ngakolunye uhlangothi, ama-latency ejwayelekile angaba ngu-500 ms noma ngaphezulu.
Insizakalo ye-intanethi elinganiswe kuma-20 Mbps ingenza okubi kakhulu kunesevisi elinganiswe ku-5 Mbps uma isebenza nge-latency ephezulu.
Isevisi ye-intanethi ye-intanethi ibonisa umehluko phakathi kwe-latency kanye nomkhawulokudonsa kumanethiwekhi wikhompyutha. I-Satellite ithola kokubili umkhawulokudonsa eliphezulu ne-latency ephezulu. Uma ulayisha ikhasi lewebhu, isibonelo, abasebenzisi abaningi be-satellite bangabona ukulibaziseka okubonakalayo kusukela ngesikhathi bengena ikheli ngesikhathi ikhasi liqala ukulayisha.
Le latency ephakeme ngokuyinhloko ngokuyinhloko kubangelwa ukulibaziseka kokusabalalisa njengoba umlayezo wesicelo uhamba ngesivinini sokukhanya uye esiteshini seSatellite esikude futhi ubuyele kunethiwekhi yasendlini . Uma imilayezo ifika eMhlabeni, noma kunjalo, imithwalo yekhasi ngokushesha ifana namanye amaxhunyiwe e-bandwidth e-intanethi (njenge-DSL noma i-intanethi ye-intanethi).
I-WAN latency ingenye uhlobo lwe-latency engabangelwa lapho inethiwekhi isematasa isebenza nge-traffic kuze kube yilapho ezinye izicelo zibambezeleka ngenxa yokuthi i- hardware ayikwazi ukusingatha konke ngokusheshisa okukhulu. Lokhu kuthinta inethiwekhi yocingo futhi kusukela inethiwekhi yonke isebenza ndawonye.
Iphutha noma enye inkinga nge-hardware ingandisa isikhathi esithathayo ukuthi sifunde idatha, esinye isizathu sokubambezeleka. Lokhu kungase kube yikhompyutha ye-hardware noma ngisho ne-hardware yedivaysi, njengengcingo encane eyinkimbinkimbi ethatha isikhathi ukugcina noma ukuthola idatha.
Isofthiwe egijima ohlelweni ingabangela i-latency futhi. Ezinye izinhlelo ze-antivirus zihlaziya yonke idatha egeleza ngaphakathi nangaphandle kwekhompyutheni, okuyisona isizathu esisodwa isizathu sokuba amanye amakhompiyutha avikelwe ahambe kancane kunabalingani bawo. Idatha ehlaziywe ivame ukuhlukaniswa futhi iskenwe ngaphambi kokuthi isetshenziswe.
Ukulinganisa i-Network Latency
Amathuluzi enethiwekhi afana nokuhlolwa kwe-ping kanye ne- traceroute isilinganiso latency ngokunquma isikhathi esithatha iphakethe yenethiwekhi elinikeziwe ukuhamba ukusuka emthonjeni ukuya endaweni, futhi emuva - okuthiwa isikhathi sokubuya .
Isikhathi sokujikeleza akuyona indlela ewukuphela kokukala i-latency kepha iyona evame kakhulu.
Izici ze-Quality of Service (QoS) zamanethiwekhi wekhaya namabhizinisi aklanyelwe ukusiza ukuphatha kokubili umkhawulokudonsa kanye ne-latency ndawonye ukuhlinzeka ukusebenza okuqhubekayo.