The Magic Number Process

Question 1

Step 1

Answer 1

Convert the subnet mask to decimal

Question 2

Step 2

Answer 2

Identify the “interesting octet” (the octet that is not 255 or 0)

Question 3

Step 3

Answer 3

Calculate the “magic number” (256 - interesting octet mask)

Question 4

Step 4

Answer 4

Calculate the host range (Subnet ID + Broadcast address)

Question 5

Step 5

Answer 5

Identify the network address (first address in the range)

Question 6

Step 6

Answer 6

Identify the broadcast address (last address in the range)