I-subnet mask 255.255.255.0 idilesi yindlela eqhelekileyo yokuthunyelwa kwe-subnet esebenzisa kwiikhomputha ezixhunyiwe kwi- Intanethi ye-Intanethi (IPv4) . Ngaphandle kokusetyenziswa kwimizila yeenethwekhi zomnatha , unokukhawulelana nale maski kwiimviwo zeekhontrakthi zengcali ezifana neCCNA .
Iingxowankulu zisebenza njengezicingo ezinqabileyo , zahlula iibhloko ze-IP kwiiyunithi ezincinci. Lo mkhuba ukhulula ukudibanisa kwenethiwekhi kwaye uvumela ukungena kwe-grranular kumanqatha.
I-mask masinki ibonisa ukuthunyelwa komntu ngamnye.
255.255.255.0 kunye ne-Subnetting
Amanqatha endabuko asebenza kunye nezixhobo ezibizwa ngokuba yiinkqubo ezinxibelelwano ezinokuthi zahlule idilesi ze-IP kwenye yeeklasi ezintlanu (iCandelo A / B / C / D / E) ngokwexabiso leenombolo zedilesi ye-IP.
I-subnet mask 255.255.255.0 iguqula kwixabiso elibini le-bin-32:
- 11111111 11111111 11111111 00000000
Idijithi ezili-0 zale maski ziluhlu lwe-IP ye-subnet-8 bits okanye kwiidilesi ezi-256 kule meko. Inani elikhulu lee-subnetworks ezincinci zingaphinda zichazwe ngokuguqula imaski njengoko kuboniswe kwitheyibhile elingezantsi.
| Mask | Subnetworks | Amakhadi / i-Subnet |
|---|---|---|
| 255.255.255.0 | 1 | 254 |
| 255.255.255.128 | 2 | 126 |
| 255.255.255.192 | 4 | 62 |
| 255.255.255.224 | 8 | 30 |
| 255.255.255.240 | 16 | 14 |
| 255.255.255.248 | 32 | 6 |
| 255.255.255.252 | 64 | 2 |
Isitokisi se-subnet esingalunganga (esibizwa ngokuba yi- netmask ) senza ezinye iintlobo zokuxhunywa kwenethiwekhi .
Iingxelo kunye neCIDR
Kwinkqubo yeklasi eqhelekileyo, amaninzi amakheli e-IP angasetshenziswanga ngenxa yokuba ababoneleli ngeenkonzo ze-intanethi kunye neenkampani ezinkulu zigcinwe kwiibhloko ze-adware ezingenakukwabelwana ngazo.
Ininzi ye-intanethi yatshintshela kwi- IP engaxhaswanga kwiinkqubo zokunxibelelanisa ukuxhasa inkxaso-nkqubo yokwabiwa kwemibandela kwaye ihlangabezane nokunyuka kweemfuno zee-intanethi ze-intanethi kuma-1990.
Ii-intanethi ezingenakucala ziguqula ukumelwa kweendwendwe zendabuko kwi-short-notation ngokusekelwe kwinani lamadijithi ayi-1 kwimaski.
I-Inter-Domain Ukuhamba ngokukhawuleza okufutshane kwaye ibhala idilesi ye-IP kunye ne-mask yomnxeba enxulumene nayo:
xxx.xxx.xxx.xxx/n
Apha, n imele inombolo phakathi kwe-1 no-31 leyo yinani leebhitaki ezili-1 kwimaski.
I-CIDR isekela ii-IP ezingabonakaliyo zokunxibelelana ne-IP kunye namanethiwekhi enxulumene neenethiwekhi kunye neenombolo zenethiwekhi ze-IP ezizimeleyo kwiklasi yabo yesiko. Iirejista ezixhasa i-CIDR ziyabona ezi nxibaniso njengeendlela zomntu ngamnye, nangona zingabonakalisa i-aggregation yamanqatha amaninzi emveli.
Iiklasi zeNethwekhi
Inhlangano ye-InterNIC elawula amagama e-intanethi ye-intanethi ihlula idilesi ze-IP kwiiklasi. Ezona zininzi eziqhelekileyo zezi zifundo ze-A, B, kunye neC. C zonke zisebenzisa i-mask-subnet mask ye-255.255.255.0.
Ukusebenzisa i-255.255.255.0 njenge-Intanethi ye-IP
Nangona kuboniswe ngefom ye-IP yelesi dilesi, amadivaysi othungelwano angasebenzisa i-255.255.255.0 kuphela njenge-mask kwaye kungekhona njengedilesi ye-IP. Ukuzama ukusebenzisa le nombolo (okanye nayiphina inombolo ye-IP eqala nge-255) njengedilesi yedivayisi yenza ukuba uxhulumaniso lwe-intanethi ye-IP lwenzeke ngenxa yenkcazo yamanqanaba eenethwekhi kwi-IP.