Binary Method Example 1
192.168.1.18/24
FIRST CONVERT THE CONCERN & THE REMANING OCTET INTO BINARY
192.168.1.00010010
THEN ADDRESS INTO BINARY
01000000.10101000.00000001.00010010
1. To workout the Network/Subnet Address
Fill the host portion of Address with Binary 0's (then convert it to Decimal)
192.168.1.18 - 192.168.1.00000000
(convert Binary into Decimal we get...)
Network Address = 192.168.1.0
2. To workout the First Host Address in a Subnet
Fill the host portion of the Address with Binary 0's except for the last bit which is set to Binary 1 (then convert it to Decimal)
192.168.1.18 - 192.168.1.00000001
(convert Binary into Decimal we get...)
First Host Address Address = 192.168.1.1
3. To workout the Last Host Address in a Subnet
Fill the host portion of the Address with Binary 1's except for the last bit which is set to 0. (then convert it to Decimal)
192.168.1.18 - 192.168.1.11111110
(convert Binary into Decimal we get...)
Last Host Address = 192.168.1.254
4. To workout the Broadcast Address
Fill the host portion of the Addresses with Binary 0's except for the last bit which is set to 1.(then convert it to Decimal)
192.168.1.18 - 192.168.1.00000001
(convert Binary into Decimal we get...)
Broadcast Address = 192.168.1.255
Reference:
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