CISSP All-in-One Exam Guide by Fernando Maymi

Author:Fernando Maymi
Language: eng
Format: epub
Publisher: McGraw Hill LLC
Published: 2022-02-15T00:00:00+00:00

Figure 14-3 Twisted-pair cabling uses copper wires.

The twisting of the wires, the type of insulation used, the quality of the conductive material, and the shielding of the wire determine the rate at which data can be transmitted. The UTP ratings indicate which of these components were used when the cables were manufactured. Some types are more suitable and effective for specific uses and environments. Table 14-2 lists the cable ratings.

Table 14-2 UTP Cable Ratings

Copper cable has been around for many years. It is inexpensive and easy to use. A majority of the telephone systems today use copper cabling with the rating of voice grade. Twisted-pair wiring is the preferred network cabling, but it also has its drawbacks. Copper actually resists the flow of electrons, which causes a signal to degrade after it has traveled a certain distance. This is why cable lengths are recommended for copper cables; if these recommendations are not followed, a network could experience signal loss and data corruption. Copper also radiates energy, which means information can be monitored and captured by intruders. UTP is the least secure networking cable compared to coaxial and fiber. If an organization requires higher speed, higher security, and cables to have longer runs than what is allowed in copper cabling, fiber-optic cable may be a better choice.

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