VLSM-Subnetting

[bryanrobh]

Start by convert the 3rd octet into binary (176, 194, 183, 159, 179, 184) then anding each bit in the 3rd octet up to the 5th bit (which /21).
10110000 = 176
11000010 = 194  This one is a no
10110111 = 183  This one is a yes
10011111 = 159  This one is a no
10110011 = 179  This one is a yes
10111000 = 184  This one is a no