Subnet Mask = 255.255.255.240
240 => 1111 0000 ( 1 represents Subnet Bits & 0 represents Host Bits )
Given IP Address = 205.18.136.187
187 => 1011 1011
- In direct broadcast address, host bits are all 1's
Therefore, for DBA : 1011 1111
DBA = 205.18.136.191