For the given subnet mask 255.255.255.224 , Find the number of subnets in each class.

Hradesh @hradeshpatel 27 Dec 2016 04:04 pm

sir in  question  no. of subnet  for class A is 2^19  its correct but some times its use no.of subnets in class A = (2^19) -2 .  so sir which one use...or both 

sardendu @sardendubharti 29 Dec 2016 01:38 am

I think  it should use 219-2 since the two host id is used fordifferent purpose

 

 

Manu F Gomez @manufg 27 Dec 2016 06:35 pm

New routers allow SIDs having all 0's and all 1's . So no need to subtract 2. 

Habib Mohammad Khan @habibkhan 27 Dec 2016 07:18 pm

According to new convention , be it classful or classless , we take it as 2n only , as evident from previous gate questions on this particular topic also..

Hradesh @hradeshpatel 27 Dec 2016 10:01 pm

so i follow........if numerical type question ----> then its 2^n