255.255.255.0 i-Subnet Mask

I-subnet mask 255.255.255.0 ikheli yi- subnet mask ejwayelekile kunazo zonke ezisetshenziselwa amakhompiyutha axhunyiwe kumanethiwekhi e- Inthanethi Protocol (IPv4) . Ngaphandle kokusetshenziswa kwayo kumanethiwekhi wenethiwekhi ekhaya , ungase uhlangabezane nalokhu mask on izivivinyo zezitifiketi zobuchwepheshe ezifana ne- CCNA .

Ukuthungatha okusebenza njengezingcingo ezibonakalayo, ukuhlukanisa i-block yamakheli e-IP zibe amayunithi amancane. Lo mkhuba ukhulula ukuhlanganiswa kwenethiwekhi futhi uvumela ukungena kwe-granular kuwo wonke ama-subnet.

Umasikisi we-subnet uveza ukuthunyelwa komuntu ngamunye.

255.255.255.0 kanye ne-Subnetting

Amanothi angokweziko asebenza ngamanethiwekhi amanethiwekhi ahlukanisa amakheli e-IP kwelinye lamakilasi amahlanu (i-Class A / B / C / D / E) ngokubaluleka kwenombolo yekheli le-IP.

I-subnet mask 255.255.255.0 iguqula ku-32-bit value kanambambili:

• 11111111 11111111 11111111 00000000

Amadijithi angu-0 ale maski ahlukanisa ububanzi be-IP yamabhithi angu-8 noma amakheli angafika ku-256 kulokhu. Inombolo ekhudlwana ye-subnetworks encane encane ingachazwa ngokushintsha imaski njengoba kuboniswe etafuleni elingezansi.

I-mask ekhonjiwe engalungile (ebizwa nangokuthi netmask ) ibangela ezinye izinhlobo zokuhluleka kwenethiwekhi kwenethiwekhi .

Izigcawu ze-CIDR

Esikimweni sokuhlelwa ngokweqile, amakheli amaningi we-IP angasetshenzisiwe alahlekile ngoba abahlinzeki bezinsizakalo ze-intanethi namabhizinisi amakhulu agcinwe amabhulokhi ekheli angakwazi ukwabelwana ngawo.

Iningi le-intanethi liphendukele kuma- IP angenakunethiwekhi ekuxhumaniseni izinqubomgomo zokwabiwa eziguquguqukayo futhi ihlangabezane nokuphakama kwesidingo samakheli e-IPv4 e-intanethi ngawo-1990.

Amanethiwekhi angenakulinganiswa aguqula ukumelela kwe-subnet yendabuko kumfushane kanye nokwaziswa ngokusekelwe kwinombolo yamadijithi angu-1 kumaski.

I-inter-Domain Routing encane engafanele engabonakali ibhala ikheli le-IP kanye ne-mask yalo yenethiwekhi ehambisanayo:

xxx.xxx.xxx.xxx/n

Lapha, n imelela inombolo ephakathi kuka-1 no-31 okungukuthi inani lama-bits angu-1 kumaski.

I-CIDR isekela ama-IP angenakuthola ukukhuluma nokuhlanganisa amaski enethiwekhi ngezinombolo zenethiwekhi ze-IP ezizimele eziklasini zazo zendabuko. Ama-routers asekela i-CIDR ayawabona la makanethiwekhi njengemizila ngabanye, noma ngabe angabonisa ukuhlanganiswa kwezintambo eziningana zendabuko.

Amakilasi enethiwekhi

Inhlangano ye-InterNIC ephethe amagama wesizinda se-intanethi ihlukanisa amakheli e-IP emakilasini. Okuvamile kakhulu kulawa amakilasi A, B, kanye namanethiwekhi aseClassi C bonke basebenzisa i-mask subnet okuzenzakalelayo ye-255.255.255.0.

Usebenzisa i-255.255.255.0 njengekheli le-IP

Nakuba kuboniswe ngesimo senombolo yekheli le-IP, amadivaysi enethiwekhi angasebenzisa kuphela i-255.255.255.0 njenge-mask hhayi njengekheli le-IP elisebenzayo. Ukuzama ukusebenzisa le nombolo (noma yinoma iyiphi inombolo ye-IP eqala nge-255) njengekheli ledivaysi kubangela ukuxhumeka kwenethiwekhi ye-IP ukuthi kuhluleke ngenxa yencazelo yamanani emigqa yamanethiwekhi e-IP.