Basic Qualification · B-003 Station assembly, practice and safety · B-003-015-010
Un protocole numérique inclut la demande automatique de répétition ("ARQ"). Quel en est l'avantage?
- ALa correction d'erreur
- BL'exploitation sans surveillance
- CLa détection d'erreur
- DL'établissement automatique de la liaison
Correct answer: A — La correction d'erreur. Question tirée de la banque officielle d'ISDE.
Why
Automatic repeat request, or ARQ, lets a digital system ask for a message to be sent again when it arrives with mistakes, which effectively fixes the error so the data is perfect. The full explanation — and one for every question — is in Pro.
Practise this section
Station assembly, practice and safety is section B-003 of the Basic exam: Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.
Drill B-003 — free, no account