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:

• Cisco CCNA 200-301 Exam: Complete Course with practical labs | Udemy