Demystifying DNS Internals & Anycast Routing: BGP Convergence, DNSSEC, and Global Edge Failover
A deep systems engineering guide to the architecture of internet routing and domain resolution. We examine how BGP Anycast routes global traffic across hundreds of edge data centers on a single IP address, dissect the DNS resolution lifecycle and EDNS Client Subnet (ECS) geo-steering, verify the DNSSEC cryptographic chain of trust, and explain why BGP route withdrawal achieves sub-second failover where DNS TTLs fail.
Read Full Deep-Dive →