Which statement is true about coaxial cable?

Coaxial cable is known for its construction, which consists of a central conductor surrounded by an insulating layer, a metallic shield, and an outer insulating layer. This design indeed results in coaxial cables typically having a larger outer diameter compared to twisted pair cables, which are comprised of pairs of wires twisted together within a more compact outer jacket. The larger outer diameter of coaxial cables is largely due to the additional layers that serve to shield against electromagnetic interference and maintain the integrity of signal transmission.

The other statements do not accurately reflect the characteristics of coaxial cable. For instance, while coaxial cable is more resistant to electromagnetic interference than twisted pair cables, it is not entirely immune to it. The idea that coaxial cables transmit data using photons is incorrect, as they rely on electrical signals rather than light. Additionally, coaxial cables do not require higher installation tension compared to fiber optic cables; in fact, fiber optic cables typically demand more careful handling due to their fragility and the nature of light transmission involved. Thus, the statement regarding the outer diameter being larger is accurate in the context of electrical cables and their typical configurations.