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Can somebody explain zero subnetting to me?
OnionJuice
Member Posts: 3 ■□□□□□□□□□
in CCNA & CCENT
Are the useable zero subnets any number between 0 the # before the first subnet (like 0-31)????
Comments
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Optionsbeef1218 Member Posts: 65 ■■□□□□□□□□Well, I assume you already read the book.
Here is an example for classA.
For 10.x.x.x/16, zero subnet: 10.0.0.0-10.0.255.255
For 10.x.x.x/24, zero subnet: 10.0.0.0-10.0.0.255
The point is to look at the mask and make the first subnet starting from 10.0.0.0 to be the zero subnet. -
Optionselphrank0 Member Posts: 67 ■■□□□□□□□□It would be 1-30 0 being network 31 being broadcast, 32 being the next subnet if you were working in a 32 block size.
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Optionsbillscott92787 Member Posts: 933Well, I assume you already read the book.
Here is an example for classA.
For 10.x.x.x/16, zero subnet: 10.0.0.0-10.0.255.255
For 10.x.x.x/24, zero subnet: 10.0.0.0-10.0.0.255
The point is to look at the mask and make the first subnet starting from 10.0.0.0 to be the zero subnet.
Beef does an excellent job of explaining it. Look at the mask which tells you which octect to concentrate as well as what the zero subnet should be. -
Optionsmanny355 Member Posts: 134So normally, subnet 0 and the Broadcast subnet would normally not be useable...in zero subnetting...those 2 throwaway subnets become useable.