Video: Dab tsi yog random nkag rau hauv cov ntaub ntawv sib txuas lus?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Random nkag hais txog kev muaj peev xwm nkag tau cov ntaub ntawv ntawm random . Qhov opposite ntawm random nkag yog ua raws nkag mus . Mus los ntawm point A rau point Z nyob rau hauv ib tug sequential- nkag mus system, koj yuav tsum dhau los ntawm txhua qhov kev cuam tshuam. Hauv ib random - nkag mus system, koj tuaj yeem dhia ncaj qha mus rau taw tes Z.
Nyob rau hauv no hais txog, dab tsi yog random nkag mus rau hauv networking?
A random - nkag mus channel (RACH) yog ib qho kev sib koom channel siv los ntawm wireless terminals rau nkag mus lub mobile network (TDMA/FDMA, thiab CDMA raws li network ) rau kev hu teeb tsa thiab tawg cov ntaub ntawv xa mus. Thaum twg mobile xav ua MO (Mobile Originating) hu nws teem caij rau RACH.
Tsis tas li ntawd, random nkag tau li cas? A random - nkag mus lub cim xeeb ntaus ntawv tso cai rau cov ntaub ntawv nkag mus (nyeem lossis sau) yuav luag tib lub sijhawm tsis hais lub cev qhov chaw ntawm cov ntaub ntawv hauv lub cim xeeb. Cov no suav nrog ntau hom ROM thiab hom flash nco hu ua NOR-Flash.
Nyob rau hauv tas li ntawd, dab tsi yog sequential thiab random access?
Sequential Access rau cov ntaub ntawv cov ntaub ntawv txhais tau hais tias lub computer system nyeem lossis sau cov ntaub ntawv rau cov ntaub ntawv ua ntu zus , pib los ntawm qhov pib ntawm cov ntaub ntawv thiab mus ua ib kauj ruam. Ntawm qhov tod tes, Random Access rau cov ntaub ntawv txhais tau hais tias lub computer system tuaj yeem nyeem lossis sau cov ntaub ntawv nyob qhov twg hauv cov ntaub ntawv.
Cov ntaub ntawv random yog dab tsi?
random ntaub ntawv . A ntaub ntawv koom nrog ib qho kev ntsuas. Kuj hu ua "direct ntaub ntawv "los yog "direct access ntaub ntawv , " nws ua kom nkag tau sai rau cov ntaub ntawv tshwj xeeb lossis lwm yam hauv lub ntaub ntawv tsis yog yuav tsum tau nyeem cov ntaub ntawv ua ntu zus. Lub index taw tes rau ib qho chaw tshwj xeeb hauv lub ntaub ntawv , thiab cov ntaub ntawv yog nyeem los ntawm qhov ntawd
Pom zoo:
Dab tsi yog qhov txawv ntawm cov ntaub ntawv davhlau ya nyob twg cov cuab yeej DTE thiab cov khoom siv sib txuas lus DCE)?
DTE (Data terminating equipment) thiab DCE (Data circuit terminating equipment) yog hom kev sib txuas lus serial. DTE yog ib qho khoom siv uas tuaj yeem ua tau raws li binary digital cov ntaub ntawv los yog qhov chaw. Thaum DCE suav nrog cov khoom siv uas xa lossis tau txais cov ntaub ntawv hauv daim ntawv digital lossis analog teeb liab hauv lub network
Dab tsi yog qhov sib txawv ntawm cov ntaub ntawv sib sau ua ke thiab cov ntaub ntawv tsis sib xws?
Kev sib sau cov ntaub ntawv yog sau thiab sau cov ntaub ntawv; kom disaggregate cov ntaub ntawv yog rhuav tshem cov ntaub ntawv sib sau ua ke rau hauv cov khoom siv lossis cov ntaub ntawv me me
Dab tsi yog tag nrho cov kab kev sib txuas lus uas xav tau rau kev sib txuas tag nrho rau taw tes network ntawm tsib lub khoos phis tawj rau lub khoos phis tawj?
Tus naj npawb ntawm cov kab sib txuas lus uas yuav tsum tau muaj rau kev sib txuas tag nrho ntawm qhov taw tes rau-taw tes ntawm yim lub khoos phis tawj yog nees nkaum yim. Ib tug tag nrho txuas cuaj lub computer network yuav tsum tau peb caug rau kab. Ib tug tag nrho txuas kaum lub computer network yuav tsum tau plaub caug tsib kab
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Dab tsi yog qhov sib txawv tseem ceeb ntawm kev sib txuas lus tsis sib xws thiab kev sib txuas lus taw qhia?
1. Hauv kev sib txuas lus tsis muaj kev sib txuas lus tsis tas yuav tsim kev sib txuas ntawm qhov chaw (sender) thiab qhov chaw (receiver). Tab sis nyob rau hauv kev sib txuas-taw qhia kev sib txuas lus kev sib txuas lus yuav tsum tau tsim ua ntej hloov cov ntaub ntawv