Binary Method Example 2

172.16.35.123/20

FIRST CONVERT THE CONCERN & THE REMANING OCTET INTO BINARY

172.16.00100011.01111011

1. To workout the Network/Subnet Address

• Fill the host portion of Address with Binary 0's (then convert it to Decimal)

• 172.16.35.123 - 172.16.00100000.00000000.0

  (convert Binary into Decimal we get...)

• Network Address = 172.16.32.0

  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)

• 172.16.35.123 - 00010000.00000001.0

  (convert Binary into Decimal we get...)

• First Host Address = 172.16.32.1

  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 Binary 0 (then convert it to Decimal)

• 172.16.35.123 - 172.16.00101111.11111110

  (convert Binary into Decimal we get...)

• Last Host Address = 172.16.47.254

  4. To workout the Broadcast Address

• Fill the host portion of the Address with Binary 1's (then convert it to Decimal)

• 172.16.35.123 - 172.16.00101111.11111111

  (convert Binary into Decimal we get...)

• Broadcast Address = 172.16.47.255

Reference:

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