Vol 2 Unit 4

1. The process of unscrambling encrypted information so that it is intelligible is known as

Decryption.

Encryption.

Cryptography.

Cryptanalysis.

2. Which type of site configuration was designed to provide coverage for a small geographical area?

Single-site.

Multi-site.

Simulcast.

Multicast.

3. The common name for the method of changing encryption keys over the radio channel in a two-way radio system is called

Over-the-air rekeying (OTAR).

Asymmetric.

Symmetric.

Off-line.

4. Which statement is not a benefit of having a trunking network?

Selective radio inhibit.

Faster system access.

Unbalanced channel loads.

Better channel efficiency.

5. Which Air Force instruction (AFI) requires communications squadrons to maintain installation notification and warning systems (INWS)?

AFI 10-2501, Air Force Emergency Management Program.

AFI 10-2801, Force Development Concepts.

AFI 33-115, Air Force Information Technology Service Management.

AFI 33-217, Voice Call Sign Program.

6. In the paint-voice system, this controls the system's signal routing and power distribution.

Landline board.

Control board.

Radio board.

Encoder.

7. Which type of cryptographic algorithm permits the encryption key to be public?

Asymmetric.

Symmetric.

Encoder.

Secret.

8. Which type of conventional land mobile radio (LMR) device maximizes the communications distance between lower-powered equipment items?

Mobile.

Portable.

Repeater.

Base station.

9. This provides the interface between dispatch consoles and the central controller in a typical trunking system.

Modems.

Access control.

Switching equipment.

System management computer.

10. Which is not a major component of the giant-voice system?

Siren cabinet.

Siren stack.

Decoder.

Encoder.

11. Which secure communications device operates by simple sliding the key tape into the reader?

KYK-13.

KOI-18.

KY-57.

KY-99A.

12. In a land mobile radio (LMR) repeater system, a device that separates and isolates the incoming receive signal from the outgoing transmit signal and vice versa is known as a

Duplexer.

Comparator.

Key-unkey relay.

Transmit-receive switch.

13. When setting up a trunking network, users with common missions or functions are assigned as

Nets.

Channels.

Talk groups.

Subscribers.

14. This differentiates the enterprise land mobile radio (ELMR) network from a regular trunking or conventional network.

Advanced encryption standard (AES) encryption.

Association of Public-Safety Communications Officials (APCO) P25 standard.

Repeater.

Centralized core controller.

Vol 2 Unit 4

1. The process of unscrambling encrypted information so that it is intelligible is known as

2.

What first name or nickname would you like us to use?

2. Which type of site configuration was designed to provide coverage for a small geographical area?

3. The common name for the method of changing encryption keys over the radio channel in a two-way radio system is called

4. Which statement is not a benefit of having a trunking network?

5. Which Air Force instruction (AFI) requires communications squadrons to maintain installation notification and warning systems (INWS)?

6. In the paint-voice system, this controls the system's signal routing and power distribution.

7. Which type of cryptographic algorithm permits the encryption key to be public?

8. Which type of conventional land mobile radio (LMR) device maximizes the communications distance between lower-powered equipment items?

9. This provides the interface between dispatch consoles and the central controller in a typical trunking system.

10. Which is not a major component of the giant-voice system?

11. Which secure communications device operates by simple sliding the key tape into the reader?

12. In a land mobile radio (LMR) repeater system, a device that separates and isolates the incoming receive signal from the outgoing transmit signal and vice versa is known as a

13. When setting up a trunking network, users with common missions or functions are assigned as

14. This differentiates the enterprise land mobile radio (ELMR) network from a regular trunking or conventional network.