Which cable type is known for being easy to tap?

Unshielded Twisted Pair (UTP) cable is known for being relatively easy to tap because it does not have any shielding to protect the data being transmitted. UTP cable consists of pairs of wires twisted together, which helps reduce electromagnetic interference to some extent, but it still allows signals to leak out more easily compared to shielded cables.

This makes UTP more vulnerable to tapping, especially in environments with a high risk of data interception. In contrast, fiber-optic cables are generally very secure against tapping because they transmit data as light, which doesn’t radiate outside the medium. Coaxial cable, while somewhat more secure than UTP, can still be tapped but requires specific techniques and equipment. Shielded Twisted Pair (STP) offers better protection against interference and is less susceptible to tapping due to its additional shielding. Thus, UTP's lack of shielding and its design make it the most susceptible option for tapping among the cable types listed.