Tutorials

• Step 1: Binary IP Calculation

  
  Tutorial on Binary IP Calculation and explains decimal and binary conversion used in IP and subnetmask calculations.
  Modified: May 23 2008
  
  

• Step 2: Old-school IP Classes

  
  Tutorial on classic IP classes and associated subnet masks explaining ANDing and subnet mask function
  Modified: May 23 2008
  
  

• Step 3: Subnet Masking

  
  Tutorial explaining the subnet function in detail. How to determine hosts, networks and subnets
  Modified: May 23 2008
  
  

• Step 4: Subnetting backwards

  
  Tutorial on reverse calculation of the subnet mask. Determine networks and hosts based on an IP address and subnet mask
  Modified: May 23 2008
  
  

• Step 5: CIDR Addressing Scheme

  
  
  Modified: Jun 18 2008