As a practical example, changing subnet mask from 255.255.255.0 to 255.255.254.0 on a 192.168.0.1 network allows users to expand into the 192.168.1.1 network without using a router, a total of 510 hosts instead of 255, effectively doubling available IP addresses. Changing the mask to 255.255.248.0 expands this further to 2046 IPs (192.168.0.1-192.168.7.254).
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