subnetting question

Im subnetting use the 256 rule.My question is, is there anytime that the 256 rule does not apply. I have an address such as 192.168.200.1/28 on th router ethernet interface and 192.168.200.2 on the pc. It seems that the 256 rule is not working on these ip address to find the subnet.

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EdTheLad

MALLYG34 wrote:

Im subnetting use the 256 rule.My question is, is there anytime that the 256 rule does not apply. I have an address such as 192.168.200.1/28 on th router ethernet interface and 192.168.200.2 on the pc. It seems that the 256 rule is not working on these ip address to find the subnet.

/28 = 255.255.255.240 i.e. 16

0,16,32...192,208

So the subnet is 192.168.192.0
Range is 192.168.192.1 -> 192.168.207.254

So the addresses you have above are within the range so you have no problem! 256 rule works, i didnt know there was a special name for this procedure.

MALLYG34

ed_the_lad wrote:

MALLYG34 wrote:

Im subnetting use the 256 rule.My question is, is there anytime that the 256 rule does not apply. I have an address such as 192.168.200.1/28 on th router ethernet interface and 192.168.200.2 on the pc. It seems that the 256 rule is not working on these ip address to find the subnet.

/28 = 255.255.255.240 i.e. 16

0,16,32...192,208

So the subnet is 192.168.192.0
Range is 192.168.192.1 -> 192.168.207.254

So the addresses you have above are within the range so you have no problem! 256 rule works, i didnt know there was a special name for this procedure.

I didnt see how you got that subnet with the 256 rule. I know how to get wth the boolean nd but that takes to long.

EdTheLad

ops! i was using a /20 mask, with a /28 mask it means first subnet is 0,second 16,third 48 etc from 256 rule.
So the host range is 1 -> 15, so 200.1 and 200.2 are in the same subnet.

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