How to Find Network Address

To find Network address
                                          IP Address
                                             AND
                                         Subnet Mask
                                      Network Address


IP address = 192.168.100.0
Subnet Mask = 255.255.255.0

192.168.100.0 (decimal) ---> 11000000 10101000 01100100 00000000 (binary)
255.255.255.0 (decimal) ---> 11111111 1111111 1111111 000000 (binary)

                                            11000000 10101000 01100100 00000000
                                  AND 11111111 11111111 11111111 00000000
                                            11000000 10101000 01100100 00000000

110000000 10101000 01100100 0000000 = 192.168.100.0