Question Bank - Computer Networks

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The address of a class B host is to be split into subnets with a 6 - bit subnet number. What is the maximum number of subnets and maximum number of hosts in each subnet ?

A.
62 subnets and 1022 hosts
B.
64 subnets and 1024 hosts
C.
62 subnets and 254 hosts
D.
64 subnets and 256 hosts

Solution:

Concept:In class B, 16 bits are reserved for Network id and 16 for host id.Explanation6 bit is added due to subnettingNumber of subnest = 26 ? 2= 62Total Network Id = 16 + 6 = 22Network Id + Host Id = 32 bitsNumber of bit in host id = h = 32 - 22 = 10 bitsThe number of available hosts = 2h ? 2,= 210 - 2 = 1024 - 2 = 1022Therefore option 1 is the correct answer 2 is subtracted because subnet values consisting of all zeros and all ones (broadcast), reducing the number of available subnets by two in classic subnetting. In modern networks. Those two are counted leading to 64 subnets.

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