Understanding IPv4 Subnetting (Part 1)
ID: f65d1efc-c6cb-58ef-9da1-9a50101f8c03
STIX ID: report--f65d1efc-c6cb-58ef-9da1-9a50101f8c03
Feed Name: WatchGuard Secplicity Blog
This Security Fundamentals article introduces IPv4 subnetting, tracing the transition from classful addressing (A/B/C) to CIDR, and explaining how network vs. host portions and slash notation (/8, /16, /24, /22) work to manage address space. It provides historical context (ARPANET, ARIN exhaustion, IETF/RFC 950) and sets the stage for Part 2, which will cover subnet masks.
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