Posted - Jan 07 2002 : 6:49:00 PM
This a question of the day that was recently posted.
I can not see how they got the answer that they stae e.g sumnet mask 255.248.0.0
For example :
Class A is 0 -to- 127 Default subnet mask 255.0.0.0
Class B is 128 -to 191 Default subnet mask 255.255.0.0
Class C is 192 -to- 223 Default subnet mask 255.255.255.0
I think that subnet mask 255.255.254.0 would be correct.
Giving a host range of 512 per subnet.
If you have an answer please show all your working-out and progress the answer.
Posted - Jan 09 2002 : 7:23:44 PM
Only in classfull subnetting are you restricted to stick with the
subnet defaults.
In a classless subnetting your are not restricted to the default
mask boundaries.
The A answer is correct because if you look at the second octet of all you ranges, you can determine that the mask subnetting is done in this octet which eliminates answers b & C
Secondly, you can see that the second octet increments by 8.
so the low order bit in 224 is 32
and the low order bit in 248 is 8 (which is what the second octet is incremented by)
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Posted - Jan 07 2002 : 6:49:00 PM 
