Which are the most expensive cable types to implement?

The most expensive cable types to implement are typically fiber optic cables, particularly those designed for long-distance communication, such as single-mode fibers. Their high cost is due to the materials used, specialized installation techniques, and the need for precision alignment of the fibers. Additionally, undersea cables, which require advanced technology and significant logistical support, also rank among the most expensive options. In contrast, traditional copper cables, while still costly, generally have lower installation and material costs.