JTIDS FINAL EXAM ACTUAL QUESTIONS AND ANSWERS
GUARANTEE A+
✔✔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
✔✔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)
✔✔Which of the following IS NOT a factor when choosing crypto key for a network?
Select all that apply. - ✔✔Employment of Dedicated Timeslot Reuse
✔✔Which OPTASK LINK set designates the crypto required and which SDU locations
the crypto is to be loaded? - ✔✔JCRYPDAT
✔✔Which of the following IS NOT directed in CJCSI 6232.01 Link 16 Spectrum
Deconfliction? - ✔✔*NOT* Affects all Link 16 users operating within 200 NM of U.S. and
its possessions (US&P)
*NOT* States that JTIDS/MIDS transmissions are on not-to-interfere basis
✔✔Which category of frequency assignment authorization is good for five years and is
entered into the Government Master File (GMF)? - ✔✔*NOT* Static Frequency
Assignment
✔✔Under which MIDS terminal mode are all the IPF features disabled? - ✔✔Combat
Protect (2) (Slide 14)
✔✔Which of the following IS NOT a Built in Test (BIT) provided by Link 16 terminals? -
✔✔Continuous BIT
✔✔Which of the following accurately describes Time Division Multiple Access (TDMA)?
- ✔✔*NOT* Used to exchange J-Series messages using non-JTIDS/MIDS equipment
, *NOT* Divides the frequency band and assigns a frequency to an individual
transmission
✔✔Which type of relay allows messages received on one net number to be relayed to
another net number? - ✔✔Zoom Relay
✔✔How many JTIDS/MIDS net numbers are there? - ✔✔127
✔✔How many nets can operate in a Link 16 network before reaching maximum spectral
capacity? - ✔✔20 nets
✔✔Which JTIDS/MIDS access mode gives specific, unique transmit timeslots to
participant(s) in which all other participants will receive? - ✔✔*NOT* Multi-nets
✔✔Which JTIDS/MIDS access mode is designed for all Network Participation Groups
(NPGs) but is currently used only for NPG 7 Surveillance? - ✔✔Timeslot Reallocation
(TSR)
✔✔The ____________ pseudo-randomly assigns a center frequency to each pulse. -
✔✔Transmission Security (TSEC) crypto variable
✔✔Which of the following IS NOT true about a JTIDS/MIDS pulse stream? -
✔✔Incompatible with the National Airspace System (NAS)
✔✔To prevent interference with the _______________there are buffer zones within the
JTIDS/MIDS frequency band. - ✔✔*NOT* Emergency Position Indicating Radio Beacon
(EPIRB)
*NOT* Military UHF band
✔✔What is another term for the hopping pattern used by a terminal for a single
transmission? - ✔✔Net
✔✔What is the link margin value that must be achieved to force an enemy jammer at
equal distance to a receiving Link 16 terminal to use 128 times more power than the
transmitting terminal? - ✔✔21 dB
✔✔Which Link 16 jam resistance characteristic defines the required distance between a
jammer and a receiver to jam Link 16 communications using equal power? - ✔✔Range
ratio
✔✔How many of the 31 symbols that are transmitted for each JWORD must be
received in order to pass uncorrupted data to the host system? - ✔✔16
GUARANTEE A+
✔✔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
✔✔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)
✔✔Which of the following IS NOT a factor when choosing crypto key for a network?
Select all that apply. - ✔✔Employment of Dedicated Timeslot Reuse
✔✔Which OPTASK LINK set designates the crypto required and which SDU locations
the crypto is to be loaded? - ✔✔JCRYPDAT
✔✔Which of the following IS NOT directed in CJCSI 6232.01 Link 16 Spectrum
Deconfliction? - ✔✔*NOT* Affects all Link 16 users operating within 200 NM of U.S. and
its possessions (US&P)
*NOT* States that JTIDS/MIDS transmissions are on not-to-interfere basis
✔✔Which category of frequency assignment authorization is good for five years and is
entered into the Government Master File (GMF)? - ✔✔*NOT* Static Frequency
Assignment
✔✔Under which MIDS terminal mode are all the IPF features disabled? - ✔✔Combat
Protect (2) (Slide 14)
✔✔Which of the following IS NOT a Built in Test (BIT) provided by Link 16 terminals? -
✔✔Continuous BIT
✔✔Which of the following accurately describes Time Division Multiple Access (TDMA)?
- ✔✔*NOT* Used to exchange J-Series messages using non-JTIDS/MIDS equipment
, *NOT* Divides the frequency band and assigns a frequency to an individual
transmission
✔✔Which type of relay allows messages received on one net number to be relayed to
another net number? - ✔✔Zoom Relay
✔✔How many JTIDS/MIDS net numbers are there? - ✔✔127
✔✔How many nets can operate in a Link 16 network before reaching maximum spectral
capacity? - ✔✔20 nets
✔✔Which JTIDS/MIDS access mode gives specific, unique transmit timeslots to
participant(s) in which all other participants will receive? - ✔✔*NOT* Multi-nets
✔✔Which JTIDS/MIDS access mode is designed for all Network Participation Groups
(NPGs) but is currently used only for NPG 7 Surveillance? - ✔✔Timeslot Reallocation
(TSR)
✔✔The ____________ pseudo-randomly assigns a center frequency to each pulse. -
✔✔Transmission Security (TSEC) crypto variable
✔✔Which of the following IS NOT true about a JTIDS/MIDS pulse stream? -
✔✔Incompatible with the National Airspace System (NAS)
✔✔To prevent interference with the _______________there are buffer zones within the
JTIDS/MIDS frequency band. - ✔✔*NOT* Emergency Position Indicating Radio Beacon
(EPIRB)
*NOT* Military UHF band
✔✔What is another term for the hopping pattern used by a terminal for a single
transmission? - ✔✔Net
✔✔What is the link margin value that must be achieved to force an enemy jammer at
equal distance to a receiving Link 16 terminal to use 128 times more power than the
transmitting terminal? - ✔✔21 dB
✔✔Which Link 16 jam resistance characteristic defines the required distance between a
jammer and a receiver to jam Link 16 communications using equal power? - ✔✔Range
ratio
✔✔How many of the 31 symbols that are transmitted for each JWORD must be
received in order to pass uncorrupted data to the host system? - ✔✔16
