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Why CIDR and classfull calculator shows different answers?????

Hi,

 

Why in my calculator subnet like 8 subnet with 62 hosts with IP 10.0.0.0 starts from 255.255.254.0 ......and not from 255.0.0.0 as 10.0.0.0 is

 

boundary like

 

nnnn nnnn.hhhh hhhh.hhhh hhhh. hhhh hhhh

it should start from host portion after first DOT.

 

like

 

nnnn nnnn.hhhh hhhh.hhhh hhhh. hhhh hhhh 

 

 

this all shloud be subnet portion why in calculator start from

 

 

nnnn nnnn.hhhh hhhh.hhhh hhhs. sshh hhhh

I have no idea may be it is CIDR mode if I use classfull all is well though. Why dont we use only CIDR confusing :( :( :(

 

Thnaks,

 

Bye,

 

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