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A class B address has the subnet mask of $255.255.224.0$. what will be the IP address of the second host in the second sub network of the main network address $132.55.0.0$?

  1. $132.55.0.1$
  2. $132.55.32.2$
  3. $132.55.64.1$ 
  4. $132.55.64.2$
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Best answer
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We know class B default NetWork mask : 255.255.0.0 ..But subnet mask is 255.255.224.0..

So 3 1's have been borrowed from host bits which will now become subnet bit.

for subnets there are 8 subnets ( 23 = 8 ) possible like 000, 001, 010 , 011 and so on .....  the first subnet is 000, second subnet 001, third 010 and fourth 011

Hence subnet no of 2nd subnet = 001 and second host will be : 00000   00000010..which can be written in dotted decimal notation as : 32.2. ( 001 00000  00000 010 )

The first 2 octets will remain undisturbed as they are part of network id.

So  B) is the correct answer..

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