Topics index
A request, examined one boundary at a time.
Four connected areas guide this publication. Notes make assumptions explicit and separate proposed checks from observed results.
Area 01
Request Paths
Request maps distinguish name lookup, transport, TLS termination and application routing. Each arrow names the protocol and the observation that can confirm it.
- Resolution
- Connection reuse
- TLS termination
- HTTP routing
Area 02
Names & Identity
Studies examine recursive DNS caches, negative answers, service names and certificate checks. Success at one boundary does not prove the next one is healthy.
- DNS records
- Cache lifetimes
- Certificate names
- Trust stores
Area 03
Proxy Trust
Proxy notes describe who may supply client and scheme metadata, where direct access is blocked and how an upstream connection gets its own security policy.
- Forwarded metadata
- Trusted peers
- Loopback listeners
- Upstream verification
Area 04
Latency & Evidence
Methods separate freshness from validation and distinguish lookup, connection, handshake and response timings. A diagnostic result keeps its route, time and assumptions.
- HTTP validators
- Cache variants
- Timeout budgets
- Reproducible probes