Variable Length Subnet Mask

In the lab below, I’ve taken the 192.168.5.0 /24 network and broken it down into 5 smaller variable length subnets. Each subnet has the required number of host IP addresses. The network has been broken down as follows:

• LAN2 is the largest subnetwork which requires 64 host IP addresses and has been given a /25 subnet mask.
• LAN1 is the second largest subnetwork which needs only 45 host IP addresses and has been given a /26 subnet mask.
• I then continued to subnet LAN3 and LAN4.
• Finally, the point-to-point network between R1 and R2 only requires 2 host IP addresses and has been given a /30 subnet mask.

 

 

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Class C IPv4 Subnetting Chart

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Circle of Subnets

circle-of-subnets-IPv4Download