JTIDS LATEST 2026 EXAM QUESTIONS AND ANSWERS
GUARANTEE A+
✔✔Which of the following MIDS LVTs can transmit at 1000 watts and is also known as
MIDS-on-Ship (MOS)? - ✔✔MIDS LVT (5)
✔✔What is the purpose of a Link 16 terminal's Secure Data Unit (SDU)? - ✔✔*NOT*
Stores Initialization Data Load (IDL) files
*NOT* Stores the terminal programming that support terminal functions
✔✔What JTIDS/MIDS protocol dictates that platforms take turns transmitting and
receiving data according to time? - ✔✔Time Division Multiple Access (TDMA)
✔✔Which type of relay requires only that at least one platform be assigned relay
timeslots and has enabled the relay function? - ✔✔*NOT* Conditional Relay
✔✔A ___________ is a group of participants, or terminals, in synchronization sharing a
common understanding of timeslot boundaries. - ✔✔JTIDS/MIDS Network
✔✔What JTIDS/MIDS net numbers are used to differentiate frequency-hopping
patterns? - ✔✔*NOT* 1 - 177
*NOT* 1 - 1,536
✔✔Which JTIDS/MIDS access mode allows only one unit to transmit per timeslot and
goes unused if that specific participant has no data to transmit? - ✔✔Dedicated access
✔✔Which JTIDS/MIDS access mode can be either operator-controlled or machine-
controlled? - ✔✔Contention access
✔✔Which JTIDS/MIDS access mode allows units to automatically and dynamically
assign surveillance capacity based on platform need? - ✔✔*NOT* Contention access
*NOT* Dedicated access
✔✔How many timeslots are in a frame in Link 16 communications? - ✔✔1,536
✔✔Which of the following is a characteristic of a JTIDS/MIDS pulse? - ✔✔*NOT* Each
pulse is 13 microseconds in duration
✔✔Each JTIDS/MIDS transmissions contains a ____________ pulse stream. -
✔✔*NOT* 72, 255 or 444
✔✔What portion of the electromagnetic spectrum do Link 16 terminals operate? -
✔✔960 - 1215 MHz frequency band
, ✔✔Link 16 jam resistance is defined in what two ways? - ✔✔*NOT* Hopping pattern
and network design
✔✔Which Link 16 jam resistance characteristic defines the power output needed to jam
Link 16 communications at equal distances? - ✔✔*NOT* Timeslot Duty Factor (TSDF)
*NOT* Electromagnetic Compatibility (EMC)
✔✔A link margin value of 21dB will force an enemy jammer using equal power to get
within how many miles of a receiving terminal if the transmitting terminal is 60 miles
away? - ✔✔*NOT* 15 miles or 1/4 the distance
✔✔What technique is used by Link 16 terminals to correct errors and erasures in a
message in order to pass uncorrupted data to the host system? - ✔✔*NOT*
Electromagnetic Compatibility (EMC)
*NOT* Message Security (MSEC)
✔✔Which JTIDS/MIDS access technique gives two or more platforms the same time
slot, net, and TSEC crypto in which to transmit because they have no requirement to
exchange information? - ✔✔Dedicated Timeslot Reuse
✔✔Which of the following IS NOT a function provided by the Link 16 terminal's Platform
J connection? - ✔✔*NOT* Provides time slot data to link monitoring systems
✔✔Which of the following IS NOT true of Link 16 spread spectrum processing? -
✔✔Decreases the power transmitted over any single frequency
✔✔Which JTIDS/MIDS access technique requires the assignment of a net number of 1
- 126 in the OPTASK LINK but is identified as the specific access mode in the Network
Description Document (NDD) as net 127? - ✔✔*NOT* Dedicated Timeslot Reuse
*NOT* Multi-Nets
✔✔Which of the following is determined by the Message Security (MSEC) variable in
Link 16? - ✔✔Encryption and decryption of message data
✔✔In which Link 16 security mode are discrete Crypto Variable Logic Labels (CVLLs)
assigned to both TSEC and MSEC? - ✔✔Partition Variable Mode (PVM)
✔✔Which of the following IS NOT true about Secure Data Units (SDUs)? - ✔✔Provides
crypto for eight days
✔✔What can an operator use to determine the Current Crypto Period Designator
(CCPD) for a specific calendar day? - ✔✔*NOT* Crypto Variable Logic Label (CVLLs)
GUARANTEE A+
✔✔Which of the following MIDS LVTs can transmit at 1000 watts and is also known as
MIDS-on-Ship (MOS)? - ✔✔MIDS LVT (5)
✔✔What is the purpose of a Link 16 terminal's Secure Data Unit (SDU)? - ✔✔*NOT*
Stores Initialization Data Load (IDL) files
*NOT* Stores the terminal programming that support terminal functions
✔✔What JTIDS/MIDS protocol dictates that platforms take turns transmitting and
receiving data according to time? - ✔✔Time Division Multiple Access (TDMA)
✔✔Which type of relay requires only that at least one platform be assigned relay
timeslots and has enabled the relay function? - ✔✔*NOT* Conditional Relay
✔✔A ___________ is a group of participants, or terminals, in synchronization sharing a
common understanding of timeslot boundaries. - ✔✔JTIDS/MIDS Network
✔✔What JTIDS/MIDS net numbers are used to differentiate frequency-hopping
patterns? - ✔✔*NOT* 1 - 177
*NOT* 1 - 1,536
✔✔Which JTIDS/MIDS access mode allows only one unit to transmit per timeslot and
goes unused if that specific participant has no data to transmit? - ✔✔Dedicated access
✔✔Which JTIDS/MIDS access mode can be either operator-controlled or machine-
controlled? - ✔✔Contention access
✔✔Which JTIDS/MIDS access mode allows units to automatically and dynamically
assign surveillance capacity based on platform need? - ✔✔*NOT* Contention access
*NOT* Dedicated access
✔✔How many timeslots are in a frame in Link 16 communications? - ✔✔1,536
✔✔Which of the following is a characteristic of a JTIDS/MIDS pulse? - ✔✔*NOT* Each
pulse is 13 microseconds in duration
✔✔Each JTIDS/MIDS transmissions contains a ____________ pulse stream. -
✔✔*NOT* 72, 255 or 444
✔✔What portion of the electromagnetic spectrum do Link 16 terminals operate? -
✔✔960 - 1215 MHz frequency band
, ✔✔Link 16 jam resistance is defined in what two ways? - ✔✔*NOT* Hopping pattern
and network design
✔✔Which Link 16 jam resistance characteristic defines the power output needed to jam
Link 16 communications at equal distances? - ✔✔*NOT* Timeslot Duty Factor (TSDF)
*NOT* Electromagnetic Compatibility (EMC)
✔✔A link margin value of 21dB will force an enemy jammer using equal power to get
within how many miles of a receiving terminal if the transmitting terminal is 60 miles
away? - ✔✔*NOT* 15 miles or 1/4 the distance
✔✔What technique is used by Link 16 terminals to correct errors and erasures in a
message in order to pass uncorrupted data to the host system? - ✔✔*NOT*
Electromagnetic Compatibility (EMC)
*NOT* Message Security (MSEC)
✔✔Which JTIDS/MIDS access technique gives two or more platforms the same time
slot, net, and TSEC crypto in which to transmit because they have no requirement to
exchange information? - ✔✔Dedicated Timeslot Reuse
✔✔Which of the following IS NOT a function provided by the Link 16 terminal's Platform
J connection? - ✔✔*NOT* Provides time slot data to link monitoring systems
✔✔Which of the following IS NOT true of Link 16 spread spectrum processing? -
✔✔Decreases the power transmitted over any single frequency
✔✔Which JTIDS/MIDS access technique requires the assignment of a net number of 1
- 126 in the OPTASK LINK but is identified as the specific access mode in the Network
Description Document (NDD) as net 127? - ✔✔*NOT* Dedicated Timeslot Reuse
*NOT* Multi-Nets
✔✔Which of the following is determined by the Message Security (MSEC) variable in
Link 16? - ✔✔Encryption and decryption of message data
✔✔In which Link 16 security mode are discrete Crypto Variable Logic Labels (CVLLs)
assigned to both TSEC and MSEC? - ✔✔Partition Variable Mode (PVM)
✔✔Which of the following IS NOT true about Secure Data Units (SDUs)? - ✔✔Provides
crypto for eight days
✔✔What can an operator use to determine the Current Crypto Period Designator
(CCPD) for a specific calendar day? - ✔✔*NOT* Crypto Variable Logic Label (CVLLs)
