ISPs delegate an entire prefix block to your router — not a single address. Here's how DHCPv6-PD works, how routers subdivide it into subnets, and how routing and firewalling work without NAT.
IPv6 replaces ARP with NDP and lets devices configure addresses without a server. Here's how Neighbor Discovery, SLAAC, and DHCPv6 work together.
IPv6 replaces 32-bit addresses with 128-bit ones — but the change goes deeper than size. Here's how IPv6 addresses are structured, what the different types mean, and how subnetting works.
Unencrypted DNS leaks every domain you visit to your ISP and any on-path observer. Here's how DNS-over-TLS, DNS-over-HTTPS, and DNS-over-QUIC fix that — and how they differ.
XGS-PON is the 10-gigabit symmetric fiber standard behind most new FTTH deployments. This post covers the full stack — physical architecture, wavelength multiplexing, upstream TDMA, PLOAM registration, GEM port encapsulation, T-CONT QoS, and dynamic bandwidth allocation.