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Video: Dab tsi yog classless chaw nyob hauv IPv4?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Classless IPv4 Chaw Nyob
Classful hais lus faib tus IP chaw nyob mus rau hauv Network thiab Host feem raws octet ciam teb. Classless chaw nyob kho tus IP chaw nyob raws li 32-ntsis kwj ntawm ib qho thiab xoom, qhov twg ciam teb ntawm network thiab cov tswv cuab feem tuaj yeem poob qhov twg ntawm ntsis 0 thiab bit31.
Tsis tas li ntawd, qhov txawv ntawm Classful addressing thiab classless addressing hauv IPv4 yog dab tsi?
Ob nqe lus hais txog qhov kev xav ntawm tus qauv ntawm asubnetted IP chaw nyob . Classless chaw nyob siv ob feem saib ntawm IP chaw nyob, thiab classful chaw nyob muaj peb feem saib. Nrog classful chaw nyob , cov chaw nyob ib txwm muaj 8-, 16-, lossis 24-ntsis network teb, raws li Chav Kawm A, B, thiab C hais lus txoj cai.
Ib sab saum toj no, vim li cas peb siv classless IP chaw nyob? Classless Internet hais lus . Yog li ntawd, nyob rau hauv thaum ntxov 1990s, Internet tau tsiv tawm ntawm ib tug chav nyob space rau a classless chaw nyob qhov chaw. Hauv lwm lo lus, tus naj npawb ntawm cov khoom siv rau ib feem ntawm lub network IP chaw nyob ua variable es tsis txhob ruaj. Lub network feem ntawm classful IP chaw nyob yog kho.
Ntxiv mus, lub npog ntsej muag yog dab tsi hauv IPv4 chaw nyob?
Nws yog hu ua subnet daim npog qhov ncauj vim nws yog siv los txheeb xyuas qhov chaw nyob network ntawm tus IP chaw nyob los ntawm kev ua haujlwm bitwiseAND ntawm netmask. Ib Subnet daim npog qhov ncauj yog 32-bitnumber uas daim npog qhov ncauj tus IP chaw nyob, thiab faib tus IP chaw nyob rau hauv lub network chaw nyob thiab chaw nyob host.
Dab tsi classless hais lus?
Classless Chaw Nyob yog ib qho kev txhim kho IP Chaw nyob qhov system. Nws ua rau kev faib tawm ntawm IP Chaw nyob siv tau ntau dua. Nws hloov cov qub chav kawm hais lus system raws li cov chav kawm. Nws tseem hu ua Classless Inter Domain Routing ( CIDR ).
Pom zoo:
Qhov txawv ntawm qhov chaw nyob thiab qhov chaw nyob yog dab tsi?
Qee zaum, 'txoj kev chaw nyob' hais txog koj lub cev qhov chaw nyob ntawm qib zoo dua hauv nroog. Piv txwv li, '1313Mockingbird Lane', tsis muaj lub nroog lub npe txuas nrog. Tab sis yog, feem ntau nws tsuas yog ib daim ntawv rov qab kom paub qhov txawv ntawm qhov chaw xa ntawv (thaum chiv keeb) thiab tam sim no e-mail chaw nyob, chaw nyob hauv web, IPaddress, thiab lwm yam
Qhov chaw nyob ntawm lub cev thiab qhov chaw nyob qhov chaw nyob yog dab tsi?
Qhov sib txawv yooj yim ntawm Logical thiab lub cev chaw nyob yog qhov chaw nyob Logical yog tsim los ntawm CPU hauv kev xav ntawm ib qho kev pab cuam. Ntawm qhov tod tes, qhov chaw nyob ntawm lub cev yog qhov chaw nyob uas muaj nyob hauv lub cim xeeb. Cov txheej txheem ntawm txhua qhov chaw nyob uas tsim los ntawm CPU fora program hu ua Logical Address Space
Dab tsi yog qhov txawv ntawm Classful addressing thiab classless addressing hauv IPv4?
Txhua tus IP chaw nyob muaj lub network thiab tus tswv tsev. Kev hais lus tsis sib xws, feem hauv lub network xaus rau ntawm ib qho ntawm cov dots sib cais hauv qhov chaw nyob (ntawm ib thaj tsam octet).Classless chaw nyob siv tus lej sib txawv ntawm cov khoom siv rau lub network thiab cov tswv cuab ntawm qhov chaw nyob.
Dab tsi yog qhov chaw nyob thiab lub cev nyob hauv OS?
Qhov sib txawv yooj yim ntawm Logical thiab lub cev chaw nyob yog qhov chaw nyob Logical yog tsim los ntawm CPU hauv kev xav ntawm ib qho kev pab cuam. Ntawm qhov tod tes, qhov chaw nyob ntawm lub cev yog qhov chaw nyob uas muaj nyob hauv lub cim xeeb. Cov txheej txheem ntawm txhua qhov chaw nyob uas tsim los ntawm CPU rau ib qho kev pab cuam hu ua Logical Address Space
Qhov txawv ntawm qhov chaw nyob sib txuas lus thiab qhov chaw nyob ruaj khov yog dab tsi?
Qhov chaw nyob xa ntawv yog chaw nyob sib txuas lus piv txwv li qhov koj nyob tam sim no. & chaw nyob Apermanent yog ntawm koj cov ntaub ntawv yog sau rau ntawm koj daim ntawv pov thawj hnub yug & daim npav pov npav. Qhov chaw nyob ruaj khov & kev sau ntawv yuav zoo ib yam lossis txawv ntawm cov ntaub ntawv siv tau