ESA Certified Alarm Technician Practice Exam

Which system uses the existing electrical wiring at a premise to transmit data between components?

1. Wi-Fi network system

2. Line carrier

3. RF wireless system

4. Fiber optic system

The correct answer is: Line carrier

The choice that references the line carrier system is accurate because it specifically utilizes the existing electrical wiring within a structure to transmit data. This method works by modulating the data signals onto the electrical lines, allowing communication between devices without needing separate wiring for the data transmission. In contrast, the other options have distinct characteristics that set them apart. A Wi-Fi network system relies on radio waves to connect devices wirelessly, using a network router to facilitate data exchange over the air. An RF wireless system also utilizes radio frequency signals but does not connect through existing household wiring. A fiber optic system depends on glass fibers to transmit data as light signals, which provides high speeds and bandwidth, but requires a separate installation of fiber optic cables altogether. Thus, the line carrier system stands out due to its innovative use of pre-existing electrical infrastructure for data communication.