Which of the following systems incorporates shared frequencies controlled by a computer that allocates the frequencies for each transmission?

The correct choice, trunking systems, refers to a sophisticated communication system used in emergency services, including firefighting, that optimizes the use of frequencies. In trunked radio systems, a computer manages the allocation of shared frequencies among multiple users. This allows the system to dynamically assign the available channels based on current communication needs, ensuring that users can communicate effectively without interference and with minimal downtime.

Trunking effectively accommodates many users on a limited number of frequencies, making it an efficient choice for departments that need to maintain communication among numerous units, such as during large-scale emergencies. The computer-controlled aspect helps minimize the chances of channel congestion and ensures that communications can be prioritized according to operational needs.

Understanding trunking systems is essential for fire fighters, as it enhances their ability to communicate quickly and clearly, which is critical in emergency situations where coordination and response can save lives.