IPv6 quietly crossed 50% of Google's traffic in early 2026. A from-scratch explanation of why the internet ran out of IPv4 addresses, how IPv6 actually differs beyond just being bigger, and the genuinely useful things a 128-bit address space makes possible.
Addressing
-
IPv6 Basics: Why We Need It, How It Differs from IPv4, and What It Unlocks -
CCNA: IPv4 Addressing and Subnetting A complete guide to IPv4 addressing and subnetting for CCNA — binary conversion, CIDR, subnet masks, the magic number method that works under exam pressure, VLSM design, and route summarization with fully worked examples.