Introduction to Joint Multi-TDL Network (MTN) Operations JT101 (FOUO) (Link-16 US Members Student Course) (20 hrs)
The legal Link 11/11B Track Qualities (TQs) are _____ while Link 16 TQs range from _____.
0-7, 0-15
How many timeslots are in a frame in Link 16 communications? [Remediation Accessed :N]
1,536 wrong: 64
How many cryptographic keys can the JTIDS/MIDS Secure Data Unit (SDU) store?
1000 plus
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
How many nets can operate in a Link 16 network before reaching maximum spectral capacity? [Remediation Accessed :N]
20 nets wrong: 127 nets 31 nets
Which of the following are true about a JTIDS/MIDS pulse stream? Select all that apply. [Remediation Accessed :N] The pulse stream period is 13 microseconds Incompatible with the National Airspace System (NAS) 6.6 microsecond interval of dead time between each pulse Each pulse in stream maintains single pulse characteristics
3 w/o Each pulse
Which of the following are components of a timeslot in Link 16 communications? Select all that apply. Data Frame Jitter Sync/Header Propagation
4 w/o frame
How many frames are in an epoch in Link 16 communications?
64
Each JTIDS/MIDS transmissions contains a ____________ pulse stream. [Remediation Accessed :N]
72, 258 or 444 wrong: 51, 255 or 444
Which of the following IS NOT a characteristic of the Network Time Reference (NTR)? [Remediation Accessed :N]
Automatically obtains coarse synchronization
Which of the following IS NOT a terminal interrupt? [Remediation Accessed :N]
Built-In Test (BIT)
Where in the Network Description Document (NDD) can a platform operator reference to identify Crypto Variable Logic Label (CVLL) usage for their platform?
COMSEC Cross Reference Table
Under which MIDS terminal mode are all the IPF features disabled?
Combat Protect (2)
In which Link 16 security mode is a discrete Crypto Variable Logic Labels (CVLLs) assigned to only the TSEC which is used for message encryption as well?
Common Variable Mode (CVM)
Dedicated Timeslot Reuse is a form of what JTIDS/MIDS access mode?
Contention Wrong: Dedicated Timeslot Reuse
Which JTIDS/MIDS access mode allows multiple participants to share common timeslots using the same net resulting in receivers hearing the closest transmitter?
Contention access Wrong: Multi-nets Timeslot Reallocation (TSR)
Which of the following IS NOT a Built in Test (BIT) provided by Link 16 terminals?
Continuous BIT
A(n) ______________ is a number between 1 and 127 that the network designer assigns to the TSEC and MSEC for each time slot.
Crypto Variable Logic Label (CVLLs)
All Link 16 equipped systems must have an approved __________ entry in order to operate.
DD Form 1494
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 mode allows only one unit to transmit per timeslot and goes unused if that specific participant has no data to transmit?
Dedicated access
What are the two types of JTIDS/MIDS RF connectivity? [Remediation Accessed :N]
Direct connectivity and indirect connectivity wrong: Line-of-sight (LOS) and Beyond Line-of-sight (BLOS)
Which of the following is a characteristic of a JTIDS/MIDS pulse? [Remediation Accessed :N]
Each pulse is 3 MHz wide and 6.4 microseconds in duration
Which of the following IS NOT determined by the Transmission Security (TSEC) variable in Link 16?
Encryption and decryption of message data
Which source document is used to determine foreign JTIDS/MIDS EMC restrictions?
JTIDS/MIDS Multinational Ad Hoc Spectrum Support Working Group Notebook
A ___________ is a group of participants, or terminals, in synchronization sharing a common understanding of timeslot boundaries.
JTIDS/MIDS Network
Which of the following best describe the Black Traffic Encryption Key (BTEK) used for Network Enabled Weapons (NEW)? Select all that apply. Link 16 waveform key Unique to the weapon Split key, KS0 Allows the NEW to communicate on Link 16
Link 16 waveform key Unique to the weapon Allows the NEW to communicate on Link 16
Link 16 jam resistance is defined in what two ways?
Link margin and range ratio
Which of the following MIDS LVTs can transmit at 1000 watts and is also known as MIDS-on-Ship (MOS)? [Remediation Accessed :N]
MIDS LVT (5) wrong: MIDS LVT (11)
Which JTIDS/MIDS access technique is not operator selectable and allows different groups of users to exchange information in different Network Participation Groups (NPGs)?
Multi-nets
What is another term for the hopping pattern used by a terminal for a single transmission? [Remediation Accessed :N]
Net wrong: Network design Jam resistance
Which document will the JICO use to provide instructions on settings and procedures about operational network entry and exit? [Remediation Accessed :N]
OPTASK LINK
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.
Platform indicators
A ____________ will use RTT exchanges to maintain and improve synchronization.
Primary User (PRU)
Which of the following are advantages of Indirect (Relay) connectivity? Select all that apply. [Remediation Accessed :N] Multiplies the time slot requirements (the relayed message needs a time slot to be transmitted in) Increased Time Slot Duty Factor (TSDF) Extends the connectivity beyond LOS Increases overall anti-jam strength through increased signal level at the receiver Provides a robust connectivity through multiple paths
Provides a robust connectivity through multiple paths Increases overall anti-jam strength through increased signal level at the receiver Extends the connectivity beyond LOS Increased Time Slot Duty Factor (TSDF) wrong: 5 4 wo Extends the connectivity beyond LOS
What are the three requirements for Link 16 direct connectivity? Select all that apply. [Remediation Accessed :N] Radio frequency (RF) Point-to-point line-or-sight (LOS) Relay must be designed into the network Sufficient propagation time within the current time slot Sufficient signal strength at the receiver
Radio frequency (RF) Point-to-point line-or-sight (LOS) Sufficient propagation time within the current time slot Sufficient signal strength at the receiver wrong: 4
Which Link 16 jam resistance characteristic defines the required distance between a jammer and a receiver to jam Link 16 communications using equal power? [Remediation Accessed :N]
Range ratio wrong: Link margin
What factors must be considered when choosing crypto key for a network? Select all that apply. [Remediation Accessed :N] Different requirements for operational and training architectures Employment of Dedicated Timeslot Reuse Service and nationality of network participants Deconfliction of JTIDS/MIDS Networks
Service and nationality of network participants Different requirements for operational and training architectures Deconfliction of JTIDS/MIDS Networks wrong: 4 3 wo Deconfliction of JTIDS/MIDS Networks
What is the purpose of a Link 16 terminal's Secure Data Unit (SDU)? [Remediation Accessed :N]
Stores cryptovariables for message and transmission security wrong: Stores Initialization Data Load (IDL) files
What measurement is used to express the pulse density of all Link 16 transmissions in a 12 second frame?
Time Slot Duty Factor (TSDF)
Which JTIDS/MIDS access mode allows units to automatically and dynamically assign surveillance capacity based on platform need?
Timeslot Reallocation (TSR)
If a TN is in use, operators should be alerted and prohibited from assigning that TN.
True
Which type of relay requires only that at least one platform be assigned relay timeslots and has enabled the relay function?
Unconditional Relay
Which of the following IS NOT true about an NTRE in an External Time Reference Network (ETRN)? [Remediation Accessed :N]
Will always have a time quality (QT) of 15
Which OPTASK LINK set designates the crypto required and which CVLL is to be loaded? [Remediation Accessed :N]
Wrong: CVLL
Which JTIDS/MIDS access technique allows a common group of timeslots to be used for the same function but on different operating selectable nets?
Wrong: Multi-nets Dedicated Timeslot Reuse
Match the correct Built in Test (BIT) to the correct description. a) Conducted any time the terminal is switched from the OFF or Standby (STBY) state to the ON state. It is a self-test that will detect general Line Replaceable Unit (LRU) and Shop Replaceable Unit (SRU) failures. b) This BIT is always running in the background while the terminal is on. It will detect a degradation in the terminal's performance, communication/network degradation, or terminal failure such as a LRU or SRU fail. c) This BIT is an operator initiated BIT that will stop the terminal from transmitting and fault-isolate to the first, second, and third most probable SRU. Start-Up BIT a b c Interruptive BIT a b c Operational BIT
abc?
The only tracks that can't be manually correlated are: Select all that apply. [Remediation Accessed :N] A local track and a remote track Simulated to live Different environments of track with active environment conflict Two remote tracks
not: 3 wo Different environments of track with active environment conflict
_______ exist when the same track number is used by two or more IUs for two or more different tracks. [Remediation Accessed :N]
not: Environmental conflicts
Which of the following is directed in CJCSI 6232.01 Link 16 Spectrum Deconfliction? Select all that apply. [Remediation Accessed :N] States that JTIDS/MIDS transmissions are on not-to-interfere basis Affects all Link 16 users operating within 200 NM of U.S. and its possessions (US&P) Provides information about timeslot allocation Requires terminal restrictions and transmission deconfliction procedures
requires ... Wrong:4 3 wo states
Mutual Tracking is a plan in which all track-producing units will ___________.
transmit their track data allowing correlation rules to determine the reporting responsibility (R2)
Which of the following is true of Link 16 spread spectrum processing? Select all that apply. [Remediation Accessed :N] Decreases the power transmitted over any single frequency Covers the entire 51 frequency bandwidth Each chip of each pulse is transmitted at full power (normally 200w) Uses a 3MHz pulse width
wrong: 4
Which of the following is true of the use of the Link 16 information assurance feature known as double pulse transmissions? Select all that apply. [Remediation Accessed :N] Will not cancel itself out at the receiver Each pulse occurs on identical frequencies Receiving terminal will decode the redundant information as normal Provides redundancy to prevent against jamming-induced data loss
wrong: 4 3 wo will not cancel itself ...
Which statement/statements is true about the RELGRID? [Remediation Accessed :N]
wrong: RELGRID was specifically designed for to be used with GMT/UTC RELGRID is always present and started by the PR
Correctly identify each segment of the NDD naming convention for USFU0020A a) Country of origin b) Originating NDF c) Version Number d) National Use e) Series Identifier f) Network Use 20 a b c d e f US a b c d e f 00 a b c d e f A a b c d e f F a b c d e f U
wrong: eadfbc?
How many JTIDS/MIDS net numbers are there? [Remediation Accessed :N]
wrong: 177
What portion of the electromagnetic spectrum do Link 16 terminals operate? [Remediation Accessed :N]
wrong: 225 - 400 MHz frequency band 175 - 255 MHz frequency band
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? [Remediation Accessed :N]
wrong: 30 miles or 1/2 the distance
Which are the two ways to achieve a multi-net? Select all that apply. [Remediation Accessed :N]
wrong: 4
Which of the following are characteristics of a frame in Link 16 communications? Select all that apply. [Remediation Accessed :N] There are 112.5 frames in an epoch The basic reoccurring unit of time Each frame contains 1,536 timeslots Each frame is 12 seconds in duration
wrong: 4
Which of the following are characteristics of a timeslot in Link 16 communications? Select all that apply. [Remediation Accessed :N] Consist of either 72, 258, or 444 pulses There are 64 frames in a timeslot Each timeslot is 7.8125 milliseconds (msec) in duration The basic unit of access
wrong: 4
Which of the following are true about JTIDS/MIDS transmissions? Select all that apply. [Remediation Accessed :N] A full transmission occurs in a single timeslot Each transmission contains one or more fixed format messages or a free text transmission Hopping pattern has a hopping rate of 76,923 hops per second A full transmission may require more than one timeslot
wrong: 4
Which of the following is true about the basic characteristics of the MIDS LVT family of Link 16 terminals? Select all that apply. [Remediation Accessed :N] Light-weight replacements for JTIDS terminals Used only by the U.S. military Several variants: LVTs (1-11) All MIDS LVTs are capable of 1,000 watts of power output Fully interoperable with other Link 16 Terminals
wrong: 4
Which are NOT methods that can be used to deconflict Link 16 networks? Select all that apply. [Remediation Accessed :N] Sufficient Geographic separation Using unique TSEC crypto keys for the main net Using different Initialization Data Load (IDL) files Employing a network time offset
wrong: 4 3 wo Sufficient Geographic separation
Which of the following is true about Secure Data Units (SDU)? Select all that apply. [Remediation Accessed :N] Limited to only 8 storage locations Can store 1000 plus keys On MIDS terminals the SDU is an external encryption unit Stores cryptographic keys
wrong: 4 3 wo stores
Which of the following is a function of Link 16 terminals? Select all that apply. [Remediation Accessed :N] Data Recording Built in Test Secure Voice Relay Relative Navigation
wrong: 4 wo relative 4 wo secure voice
Which of the following are disadvantages of Indirect (Relay) connectivity? Select all that apply. [Remediation Accessed :N]
wrong: 5
Which of the following IS NOT true about a JTIDS/MIDS pulse stream? [Remediation Accessed :N]
wrong: 6.6 microsecond interval of dead time between each pulse Each pulse in stream maintains single pulse characteristics
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? [Remediation Accessed :N]
wrong: 72 dB 31 dB 16 dB
Which JTIDS/MIDS access mode gives specific, unique transmit timeslots to participant(s) in which all other participants will receive? [Remediation Accessed :N]
wrong: Contention access
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? [Remediation Accessed :N]
wrong: Dedicated Timeslot Reuse Multi-nets
Which of the following IS NOT a factor when choosing crypto key for a network? Select all that apply. [Remediation Accessed :N]
wrong: Different requirements for operational and training architectures
Which of the following accurately describes Time Division Multiple Access (TDMA)? [Remediation Accessed :N]
wrong: Divides the frequency band and assigns a frequency to an individual transmission Allows multiple radios to share the same bandwidth by assigning unique codes to each transmission
Which source document is used to determine foreign JTIDS/MIDS EMC restrictions? [Remediation Accessed :N]
wrong: JTIDS/MIDS Spectrum Users Guide (JSUG)
What JTIDS/MIDS protocol dictates that platforms take turns transmitting and receiving data according to time? [Remediation Accessed :N]
wrong: Joint Range Extension Application Protocol (JREAP) Code Division Multiple Access (CDMA)
The ____________ pseudo-randomly assigns a center frequency to each pulse. [Remediation Accessed :N]
wrong: Message Security (MSEC) crypto variable
Which OPTASK LINK set designates the crypto required for Network Enabled Weapons (NEW)? [Remediation Accessed :N]
wrong: NATJNL
Which of the following is a function provided by the Link 16 terminal's JREAP C connection? [Remediation Accessed :N]
wrong: Provides time slot data to link monitoring systems
Which of the following IS NOT a function provided by the Link 16 terminal's Platform J connection? [Remediation Accessed :N]
wrong: Provides time slot data to link monitoring systems Communicates Functional Input Messages (FIMs) and Functional Output Messages (FOMs) Allows for terminal hosting
To prevent interference with the _______________there are buffer zones within the JTIDS/MIDS frequency band. [Remediation Accessed :N]
wrong: Public Broadcast System (PBS)
Which Link 16 jam resistance characteristic defines the power output needed to jam Link 16 communications at equal distances? [Remediation Accessed :N]
wrong: Range ratio
Which of the following IS NOT true of the use of the Link 16 information assurance feature known as double pulse transmissions? [Remediation Accessed :N]
wrong: Receiving terminal will decode the redundant information as normal Provides redundancy to prevent against jamming-induced data loss
Which of the following IS NOT directed in CJCSI 6232.01 Link 16 Spectrum Deconfliction? [Remediation Accessed :N]
wrong: Requires terminal restrictions and transmission deconfliction procedures States that JTIDS/MIDS transmissions are on not-to-interfere basis
Link 16 line-of-sight connectivity is limited by what type of signal propagation? [Remediation Accessed :N]
wrong: Skywave propagation
Which of the following IS NOT a Built in Test (BIT) provided by Link 16 terminals? [Remediation Accessed :N]
wrong: Start-Up BIT
What two methods can be used for Link 16 network deconfliction? Select all that apply. [Remediation Accessed :N]
wrong: Sufficient geographic separation Employing a network time offset wrong:
What are the two types of Link 16 capacity? Select all that apply. [Remediation Accessed :N]
wrong: System capacity
Which JTIDS/MIDS access mode can be either operator-controlled or machine-controlled? [Remediation Accessed :N]
wrong: Timeslot Reallocation (TSR)
Match the proper terminology to the correct definition a) A set of protocols used to exchange J-Series messages using non-JTIDS/MIDS equipment b) The language Link 16 capable weapons systems use to exchange tactical information c) Conventions and record message formats that support information exchange defined by MIL-STD-6016 d) Communications component of Link 16 JTIDS/MIDS Link 16 J-Series Messages JREAP
wrong: a Link 16 b JTIDS/MIDS c JREAP d J-Series Messages b JTIDS/MIDS c J-Series Messages a JREAP d Link 16 b JTIDS/MIDS a J-Series Messages d Link 16 c JREAP a Link 16 b JTIDS/MIDS c JREAP b J-Series Messages
Correctly choose the data registration process and its description a) Process in which a JTIDS/MIDS Unit (JU) monitors and adjusts positional data with information derived through Relative Navigation (RELNAV). b) Compares local data to tracks received from a selected IU and applies corrective values to positional data received from that IU. c) Process that corrects alignment of the sensor elements used for the measurement of a tracked object's position. Sensor Registration a b c Geodetic Registration a b c Remote IU Registration a b c
wrong: a Sensor Registration b Geodetic Registration c Remote IU Registration a Sensor Registration b Geodetic Registration c Remote IU Registration b Sensor Registration a Geodetic Registration c Remote IU Registration c Sensor Registration b Geodetic Registration a Remote IU Registration
Match the correct Network Participation Group (NPG) to the correct description. a) Supports the reporting of PPLI and system status messages b) Supports reporting of all surveillance tracks, Electronic Warfare product information, lines, areas, points, and associated track management messages c) Used to exchange formatted text messages, commonly called JTIDS free text messages d) Supports the exchange of Electronic Warfare parametric data. e) Used for Network Enabled Weapons f) Used by C2JUs to control non-C2JUs and by non-C2JUs to provide backlink responses and targets NPG 7 a b c d e f NPG 18 a b c d e f NPG 29 a b c d e f NPG 6 a b c d e f NPG 10 a b c d e f NPG 9
wrong: abcdef
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? [Remediation Accessed :N]
wrong: contention Stacked Nets
Which of the following is true about the SDU used by the MIDS LVTs? Select all that apply. [Remediation Accessed :N] Uses the Programmable KOV-55 LVT Crypto Module (LCM) Uses the KGV-8 Thornton Certified to secure SECRET data and below Doesn't perform automatic key rollover
wrong: 4 3 wo Uses the KGV-8 Thornton
What JTIDS/MIDS net numbers are used to differentiate frequency-hopping patterns?
0 - 126
_________ produce and transmit surveillance tracks.
C2IUs
Data Registration is ___________.
a condition of correct relative alignment between local and remote track positional data
Which statement/statements is true regarding GEOGRID and RELGRID operations? [Remediation Accessed :N]
wrong: RELGRID operations can be activated by the Positional Reference (PR)
Match the correct Built in Test (BIT) to the correct description. [Remediation Accessed :N] a)Conducted any time the terminal is switched from the OFF or Standby (STBY) state to the ON state. It is a self-test that will detect general Line Replaceable Unit (LRU) and Shop Replaceable Unit (SRU) failures. b)This BIT is always running in the background while the terminal is on. It will detect a degradation in the terminal's performance, communication/network degradation, or terminal failure such as a LRU or SRU fail. c)This BIT is an operator initiated BIT that will stop the terminal from transmitting and fault-isolate to the first, second, and third most probable SRU. a b c Start-Up BIT a b c Interruptive BIT a b c Operational BIT
wrong: a Start-Up BIT b Interruptive BIT c Operational BIT
Match the component of a Link 16 timeslot to the correct definition a) Variable wait time before data pulses are transmitted that contributes to jam resistance b) Time allowed for the transmission to travel to potential receivers that determines the maximum range of point-to-point connectivity c) Contains the majority of information and is made up of 186 or 372 pulses depending on packing structure d) Consists of 72 pulses and provides time refinement and timeslot specific information such as timeslot and message type
wrong: abcd
Match the correct J-Series Message category to the correct description. a) Land Point PPLI: Transmitted by stationary land platforms b) Air Track: Transmitted by C2JUs to report air tracks c) Residual Message: Allows various Link 16 participants to send free text messages among themselves d) Command Message: Used by C2JUs to exchange threat warning conditions, alert states, weapons condition orders and to direct weapon system engagements e) Mission Assignment Message: Normally sent from a C2JU to a non-C2JU to assign missions, designates targets and provides target information f) Correlation Message: Used by C2JUs to resolve air and surface track dual designations J28.2 a b c d e f J9.0 a b c d e f J3.2 a b c d e f J2.5 a b c d e f J12.0 a b c d e f J7.2 a b c d e f
wrong: abcdef
