
Anycast vs Unicast - Under the Hood
Unicast maps one IP to one place. Anycast maps one IP to many places and lets BGP pick the path. How both work, where DNS and CDNs use them, and which failures look like app bugs.

Unicast maps one IP to one place. Anycast maps one IP to many places and lets BGP pick the path. How both work, where DNS and CDNs use them, and which failures look like app bugs.

DNS is a globally distributed, hierarchical, eventually consistent naming database. Stub, recursive resolver, root, TLD, authoritative name server, caching, TTL, and anycast.

A practical design guide for intent routing — route tables, layered classification, confidence thresholds, session stickiness, eval gates, and wiring dispatch into the agentic app before the model loop runs.

AI observability is not a dashboard. It is a capture-and-retention architecture with five signals, five retention policies, and four consumers.