IP 1
192.168.100.20/24
11000000.10101000.01100100.00010100
Network Mask
11111111.11111111.11111111.00000000
Network ID
11000000.10101000.01100100.00010100 11111111.11111111.11111111.00000000 ----------------------------------- (AND) 11000000.10101000.01100100.00000000 ← Network ID
Broadcast Address
NOT mask = 00000000.00000000.00000000.11111111
11000000.10101000.01100100.00010100 00000000.00000000.00000000.11111111 ----------------------------------- (OR) 11000000.10101000.01100100.11111111 ← Broadcast Address
IP 2
12.12.3.2/13
00001100.00001100.00000011.00000010
Network Mask
11111111.11111000.00000000.00000000
Network ID
00001100.00001100.00000011.00000010 11111111.11111000.00000000.00000000 ----------------------------------- (AND) 00001100.00001000.00000000.00000000 ← Network ID
Broadcast Address
NOT mask = 00000000.00000111.11111111.11111111
00001100.00001100.00000011.00000010 00000000.00000111.11111111.11111111 ----------------------------------- (OR) 00001100.00001111.11111111.11111111 ← Broadcast Address