Set up the certificate chain for secure message exchange.
Assessment scope
Step 11 - PKI & Certificate Chain. Before you can exchange a single TEL TSI message via the Common Interface - whether a PathRequestMessage to the first infrastructure manager or a TrainCompositionMessage before departure - a specific certificate chain must be in place. This module tests whether you know that chain and the obligations it creates.
Governing articles & annex points
The 5 questions in this module are judged against these provisions of Commission Implementing Regulation (EU) 2026/253. Each reference opens the official text in the EU Official Journal on EUR-Lex.
Source transparency: inside the assessment, every verdict cites its exact article or annex point - the references above are extracted from this module’s question set, not written for marketing.