Answer Posted / r.k.gupta

if Network id- 192.115.103.64/27
subnet mask- 255.255.255.224
block size=32
no of possible network=8
1st network id-192.115.103.0-192.115.103.31
2nd network id-192.115.103.32-192.115.103.63
3rd network id-192.115.103.64-192.115.103.95
4th network id-192.115.103.96-192.115.103.127
5th network id-192.115.103.128-192.115.103.159
6th network id-192.115.103.160-192.115.103.191
7th network id-192.115.103.192-192.115.103.223
8th network id-192.115.103.224-192.115.103.255
our network id is 192.115.103.64
so valid ip range of this net is 192.115.103.65-192.115.103.94
because 192.115.103.64 is a network address
and 192.115.103.95 is a broadcast address

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