Optics and transceivers: SFP, QSFP, DAC and AOC
Pluggable form factors, what the shape does and doesn't tell you, and choosing the right module or cable.
- Level
- Intermediate
- Length
- About 40 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Distinguish SFP-family and QSFP-family form factors
- Explain why speed and reach must be read from the label or part number
- Choose between optics, DAC and AOC for a given link
Course outline
- 1.Optics and transceiversVideo · 2 min
- 2.Form factors vs what's insideLesson · 15 min
- 3.Choosing and installing a transceiverLesson · 12 min
- 4.Reading optic diagnostics (DOM) and fixing dark linksLesson · 12 min
- 5.Optics and transceivers: SFP, QSFP, DAC and AOC: knowledge checkKnowledge check · 22 questions
- 6.New 10G link won't come upScenario
- 7.Final exam6 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- SFF / MSA specifications for SFP, SFP+, QSFP and QSFP28 pluggable modules
- Your equipment vendors' installation and service guides (rail kits, PSU and BMC documentation)
See it with your own jobs and topics
Tell us about your team and we'll walk you through setup, from choosing jobs to your first skills check.