IP addressing gives every device on a network a unique identifier, but the real security value comes from subnetting — dividing one large address space into smaller, isolated segments — and NAT, which lets many internal devices share a single public address while hiding their real addresses from the outside world. Together, subnetting and NAT are the earliest and cheapest network-level security controls available, because a well-segmented network limits how far an attacker who breaches one machine can actually reach.
Analogy🏏Cricket
💪 Think of it like fitness: injuries follow a predictable chain — poor warm-up, then form breakdown, then compensation, then the actual tear — and a good physio catalogs where each patient's chain can be interrupted early, rather than only treating the tear afterward. MITRE ATT&CK is the sports-medicine literature of intrusions: a public catalog of every observed breakdown pattern, organized by the stage it serves — how attackers get in, how they escalate, how they extract. Coaches worldwide describe an athlete's risk in that shared vocabulary. This reveals ATT&CK's real value: intrusions become a sequence you can interrupt at stage two, not a disaster you discover at stage five.