I-Subnet Mask Incazelo kanye Nezibonelo
I-subnet mask yiyona ikheli le-IP elifana negama le-subnetwork lapho ikhompyutha noma enye idivayisi yenethiwekhi ingeyakho. Yinombolo ye-32-bit ehlukanisa ikheli le-IP ezinhlangothini zalo ezimbili: ikheli lenethiwekhi nekheli le-host.
I-subnet mask (ebizwa nangokuthi netmask), ke, ihlelwe kanje:
I-subnet mask idalwe ngokusetha zonke izinkinobho zenethiwekhi kuya ku-1s kanye ne-bits host host kuya ku-0s. I-inethiwekhi igcina amakheli amabili angabelwe abakwaSomnini, futhi lawo afaka i-0 yekheli lenethiwekhi kanye ne-255 yekheli lokusakaza.
Izibonelo zeMask Mask
Lezi yi-netmasks ezisetshenziselwa i-Class A (16-bit), i-Class B (16-bit), namanethiwekhi ase-Class C (24-bit):
- Amanethiwekhi ase-Class A asekela abantu abangu-16,777.216 futhi anesiski se-subnet of 255.0.0.0.
- Amanethiwekhi e-Class B ane mask subnet ye 255.255.0.0 futhi angaba namadivayisi angu-65,534 kuphela.
- Iningi lamanethiwekhi asekhaya ayingxenye C, ekhethwe yi-subnet mask ka 255.255.255.0. Lokhu usayizi wenethiwekhi ingaqukatha amadivayisi angu-256 we-IP, iningi lamakamelo kunoma yiliphi ibhizinisi elijwayelekile noma lebhizinisi elincane.
Cabanga ngekheli le-IP 128.71.216.118. Uma sicabanga ukuthi ikheli le-Class B, izinombolo ezimbili zokuqala (128.71) zichaza ikheli lenethiwekhi yeClass B ngenkathi ezimbili zokugcina (216.118) zikhomba ikheli lokusingatha.
Bona okuningi mayelana nama-subnet masks ku- Subnet Masks ne-Subnetting tutorial.