INTRODUCTION TO JOINT MULTI TDL NETWORK POST 3
EXAM 2025/2026 QUESTIONS WITH ANSWERS GRADED
A+
✔✔What is required for a Link 16 terminal to obtain coarse synchronization? -
✔✔(Correct) Reception of one error free J0.0 Initial Entry Message (IEM)
✔✔What is the output of the Network Information Exchange Requirements (IER)
Definition step in the Network Management System? - ✔✔(Wrong) Network Description
Document (NDD) and Initialization Data Load (IDL) files
(?) Operations Order (OPORD)
(?) Link 16 Network Request Form sent to the Network Design Facility (NDF)
(?) OPTASK LINK message
✔✔Subscriber functions are the actions, other than maintenance, that are required to
maintain Link 16 network operations and include net number selection,
________________, and Network Participation Status, or NPS. - ✔✔(Correct) Platform
indicators
✔✔Which of the following IS NOT responsible for the Link 16 network maintenance
functions? - ✔✔(Correct) Grid Reference Unit
✔✔Which type of Link 16 network is based off GPS time corrected to UTC? -
✔✔(Wrong) Network Time Reference (NTR)
(?) External Time Reference Network (ETRN)
(?) Relative Time Referenced Network
(Wrong) System Time Reference Network (STRN)
✔✔What are the three types of words that make up a J-Series message? - ✔✔(Wrong)
Entry, Extension and Continuation
(?) Entry, Extended and Critical
(?) Initial, Extension and Continuation
(?) Initial, Extended and Critical
✔✔Which statement/statements regarding PPLIs is accurate? - ✔✔(Wrong) In RELNAV
operations, a position quality of 0 is the most accurate
(?) As the position qualities get lower, the error estimates get lower
(?) In RELNAV operations, a position quality of 15 is the most accurate
, (?) The Navigational Controller always reports a position quality of 0
✔✔What is the purpose of the Network Design step in the Network Management
System? - ✔✔(Correct) Selection, modification, or creation of the network design
✔✔What is the legal Link 16 surveillance track number value range? - ✔✔(Correct)
00001 - ZZ777
✔✔Which document will the JICO use to provide instructions on settings and
procedures about operational network entry and exit? - ✔✔(Correct) OPTASK LINK
✔✔What document defines Link 16 NPGs and J-Series messages? - ✔✔(Correct) MIL-
STD-6016 DoD Interface Standard Tactical Data Link (TDL) 16 Message Standard
✔✔What is required for a Link 16 terminal to ACTIVELY obtain fine synchronization? -
✔✔(Correct) Successful exchange of three Round Trip Timing (RTT) messages
✔✔Which of the following IS NOT true about an NTRE in an External Time Reference
Network (ETRN)? - ✔✔(Wrong) Required to establish an ETRN
(?) Will always have a time quality (QT) of 15
(Wrong) Behaves identically to a JUE once the network is established
(?) Not necessary in an ETRN to provide network stability
✔✔Which of the following IS NOT a characteristic of the Network Time Reference
(NTR)? - ✔✔(Wrong) Establishes network time
(?) Will always have a time quality (QT) of 15
(?) Automatically obtains coarse synchronization
(?) Transmits an Initial Entry Message (IEM)
✔✔A ____________ will use RTT exchanges to maintain and improve synchronization.
- ✔✔(Correct) Primary User (PRU)
✔✔What is the output of the Network Planning step in the Network Management
System? - ✔✔(Correct) OPTASK LINK message
✔✔What OPTASK LINK set will identify the U.S. Navy network design identifying
information? - ✔✔(Correct) NATJNL
✔✔Subscriber functions are the actions, other than maintenance, that are required to
maintain Link 16 network operations and include _______________, platform
indicators, and Network Participation Status, or NPS. - ✔✔(Wrong) Timeslot Reuse
EXAM 2025/2026 QUESTIONS WITH ANSWERS GRADED
A+
✔✔What is required for a Link 16 terminal to obtain coarse synchronization? -
✔✔(Correct) Reception of one error free J0.0 Initial Entry Message (IEM)
✔✔What is the output of the Network Information Exchange Requirements (IER)
Definition step in the Network Management System? - ✔✔(Wrong) Network Description
Document (NDD) and Initialization Data Load (IDL) files
(?) Operations Order (OPORD)
(?) Link 16 Network Request Form sent to the Network Design Facility (NDF)
(?) OPTASK LINK message
✔✔Subscriber functions are the actions, other than maintenance, that are required to
maintain Link 16 network operations and include net number selection,
________________, and Network Participation Status, or NPS. - ✔✔(Correct) Platform
indicators
✔✔Which of the following IS NOT responsible for the Link 16 network maintenance
functions? - ✔✔(Correct) Grid Reference Unit
✔✔Which type of Link 16 network is based off GPS time corrected to UTC? -
✔✔(Wrong) Network Time Reference (NTR)
(?) External Time Reference Network (ETRN)
(?) Relative Time Referenced Network
(Wrong) System Time Reference Network (STRN)
✔✔What are the three types of words that make up a J-Series message? - ✔✔(Wrong)
Entry, Extension and Continuation
(?) Entry, Extended and Critical
(?) Initial, Extension and Continuation
(?) Initial, Extended and Critical
✔✔Which statement/statements regarding PPLIs is accurate? - ✔✔(Wrong) In RELNAV
operations, a position quality of 0 is the most accurate
(?) As the position qualities get lower, the error estimates get lower
(?) In RELNAV operations, a position quality of 15 is the most accurate
, (?) The Navigational Controller always reports a position quality of 0
✔✔What is the purpose of the Network Design step in the Network Management
System? - ✔✔(Correct) Selection, modification, or creation of the network design
✔✔What is the legal Link 16 surveillance track number value range? - ✔✔(Correct)
00001 - ZZ777
✔✔Which document will the JICO use to provide instructions on settings and
procedures about operational network entry and exit? - ✔✔(Correct) OPTASK LINK
✔✔What document defines Link 16 NPGs and J-Series messages? - ✔✔(Correct) MIL-
STD-6016 DoD Interface Standard Tactical Data Link (TDL) 16 Message Standard
✔✔What is required for a Link 16 terminal to ACTIVELY obtain fine synchronization? -
✔✔(Correct) Successful exchange of three Round Trip Timing (RTT) messages
✔✔Which of the following IS NOT true about an NTRE in an External Time Reference
Network (ETRN)? - ✔✔(Wrong) Required to establish an ETRN
(?) Will always have a time quality (QT) of 15
(Wrong) Behaves identically to a JUE once the network is established
(?) Not necessary in an ETRN to provide network stability
✔✔Which of the following IS NOT a characteristic of the Network Time Reference
(NTR)? - ✔✔(Wrong) Establishes network time
(?) Will always have a time quality (QT) of 15
(?) Automatically obtains coarse synchronization
(?) Transmits an Initial Entry Message (IEM)
✔✔A ____________ will use RTT exchanges to maintain and improve synchronization.
- ✔✔(Correct) Primary User (PRU)
✔✔What is the output of the Network Planning step in the Network Management
System? - ✔✔(Correct) OPTASK LINK message
✔✔What OPTASK LINK set will identify the U.S. Navy network design identifying
information? - ✔✔(Correct) NATJNL
✔✔Subscriber functions are the actions, other than maintenance, that are required to
maintain Link 16 network operations and include _______________, platform
indicators, and Network Participation Status, or NPS. - ✔✔(Wrong) Timeslot Reuse
