IPv4 subnets are used in order to expand the capacity of hosts and efficiently use one assigned IP.

This is a great tool for networking students as well as the network s who are working towards their certifications such as, CCNA, CCDA, CCNP, CCIE etc.

In networks having many unassigned IP addresses, a variable-length subnet mask (VLSM) can provide more efficient use of address space.

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