The coaxial cable represents bearing copper vein in an insulator and a shielding braid. Advantages: low cost of a cable, high range of data transmission without relaying. Lacks: low speed of data transmission, low security from not authorized listening. The given kind of a cable already attains the age.

The twisted pair represents some pairs copper wires twisted around each other. Depending on thickness of these wires and quantity of pairs cables share on a category from 1 up to 6. The first category - a simple telephone wire, the fifth category - four pairs (8 wires). The letter "S" means, that a cable is shielded. Advantages: high speed of data transmission, low cost, wide applicability. Lacks: low security from not authorized listening, low range of data transmission without relaying (depends on a category, but all the same it is not high).

The fiber-optical cable represents a vein from a transparent fiber, the factor of which refraction of a material allows to transfer by repeated internal reflections a light signal to long distances with the minimal losses. The fiber-optical vein is in special gel, in the same gel there is the protective cord stiffening a cable. Outside all structure is covered by the protective braid proof to mechanical influences. Advantages of the given kind of a cable: high range of data transmission, high security from listening, high speed of data transmission. Lacks: rather high cost.