How this course works

This is the first lesson in a three-course track on domain registration and DNS. Read this one before the others. It tells you the shape of what’s ahead so the rest stops feeling like loose pieces.

The three courses, end to end

The track splits into three:

• Foundation (this course). The four-layer mental model that runs through everything else (registrar, DNS host, web host, mail host as separate companies), then domain registration end to end, then the daily-bread DNS records you’ll touch every shift: A, AAAA, CNAME, MX, TXT, and TTL.
• Records and mail authentication. The less-common records (SRV, CAA, NS delegation, PTR), the lookup-tools toolbelt (dig, nslookup, Resolve-DnsName), and email authentication: SPF, DKIM, and DMARC at identify-and-apply depth.
• Transfers and judgement. The highest-stakes routine work in the space: registrar and DNS-host transfers, mail-vs-web migration independence, TTL discipline as the universal pre-flight, the DNSSEC safe-disable checklist, and the judgement calls that prevent client outages.

Each course sits on the one before it. The records course assumes you know the four-layer model. The transfers course assumes you can read a zone and verify an SPF record. Don’t skip ahead.

How the lessons run

Most lessons are 5 to 12 minutes. You read, you walk through a decision or two, then a short recall check confirms it landed. Some lessons are action-shaped (the safe-disable checklist, the post-cutover verification sequence) and walk you through a procedure step by step. A handful are pure judgement (the cardinal sins lesson, the two-question reversibility test).

You’ll see Decision walkthroughs at the end of most lessons. They are interactive: pick the option that matches what you’d do, and the response tells you why your pick was right or wrong. Wrong picks are where the teaching happens, so don’t gun for the right answer on first read.

How knowledge checks gate progress

Each course ends with a final quiz. Pass it and the next course unlocks. Some lessons also have short checkpoints inline: one or two questions to confirm a particular concept landed before you move on. Checkpoints don’t carry forward to your course score; they’re for you, not the LMS.

The questions don’t trick you. If a lesson didn’t put the answer in front of you, the question isn’t on the check.

What course completion means

Passing the final scenario assessment at the end of the Transfers and judgement course is a recommendation of readiness, not your MSP’s sign-off. Your MSP runs its own shadow-and-sign-off process: a senior reviews your first live tickets and signs off when the work is good. The course score is one input the senior reads when deciding whether you’re ready for that review.

What’s next

The next lesson sets up the habit that runs through the rest of the course: a running list of the bits that didn’t quite click, so they don’t slip away between sittings.