TDL 100 study guide practice questions and correct answers GRADED A+

TDL 100 STUDY GUIDE
PRACTICE QUESTIONS
AND CORRECT ANSWERS
GRADED A+ 2025-2026
Define TDL - ANS-A standardized comms link suitable for transiting digital
information


What is the primary data transmission characteristic for Link 11? - ANS-Half Duplex


List the message type for L11? - ANS-M-Messages


Define Link 11 - ANS-tactical, 2 way data exchange radio link, used for mutual
exchange of data. It is characterized as being half-duplex, netted, secure data link,
which operates in the roll call mode and uses M-Series messages



What is the basic function of the Data Terminal / Modem? - ANS-To convert digital
data into a format for transmission used on a comms medium and to convert the
received signal back to digital


What is the purpose of Roll Call mode? - ANS-A network mode in which units will take
turns transmitting based on a poll by the NCS


What type of encryption unit does Canada employ for L11? - ANS-KG 40


What is the OTL and what does it provide? - ANS-OPTASK Link is a message that has
the coordinating instructions req for units to configure and operate multilinks in a
theatre or AOO