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TCP/IP

Resolver Roundtable — DNS and HTTP edges

Pairs live resolver traces with CDN cache headers. You document cross-region behavior for learners based in Japan who support global SaaS tenants.

3 weeks · evening clinics · Hybrid cohort

JPY 76,000 · informational until enrollment PDF is signed

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Inside the syllabus

  • Resolver hop maps with color-coded risk notes
  • CDN header flashcards
  • English email templates for upstream partners
  • Office hours on ANY vs. CNAME pitfalls
  • Optional QUIC discussion clinic
  • Diagnostics reviewer office slots
  • Final evidence packet grading

Outcomes you can evidence

  1. Isolate resolver vs. origin issues within two measurement passes
  2. Explain TTL tradeoffs to product teams without jargon pile-ons
  3. Ship a bilingual summary email that upstream teams accept

Participant notes

Short punchy win: Resolver Roundtable’s CDN header flashcards stopped me from blaming “DNS ghosts.”

Jonah · Sapporo gaming backend

Program questions

We cover dual-stack behaviors but do not certify you as an IPv6 architect.