<ul><li>Subnetting is the process of dividing a large IP network into smaller, more manageable subnetworks called 'subnets'. It aids in efficient IP address allocation, improved network performance, and better security and isolation.</li><li>CIDR stands for Classless Inter-Domain Routing, replacing the old class-based IP system to define IP ranges more flexibly with format like 192.168.1.0/24. Different CIDR notations allocate varying numbers of usable hosts per subnet.</li><li>Calculating subnets, hosts, and address ranges manually can be tedious and error-prone. A subnet calculator like the free online tool provided can simplify this process and help in planning IP allocations efficiently.</li><li>Understanding CIDR and subnetting math enables deeper comprehension. Decreasing subnet sizes reduce available IPs but provide better control. CIDR notation signifies the fixed number of bits for the network, impacting the total and usable IPs per subnet.</li></ul>

🧠 Understanding CIDR and Subnetting: A Simple Guide for Beginners

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