Twisted-pair cable is not a type of optical fiber; it uses copper wires to transmit electrical signals, whereas optical fiber transmits data as light through glass or plastic strands.

Key Differences

Transmission Medium: Twisted-pair cables consist of two insulated copper wires twisted together to reduce electromagnetic interference, transmitting data as electrical signals. Optical fiber cables, on the other hand, use thin strands of glass or plastic to transmit data as pulses of light, making them immune to electromagnetic interference and suitable for long-distance communication . Bandwidth and Speed: Optical fiber supports much higher bandwidth and faster data transmission over longer distances compared to twisted-pair cables, which are limited in speed and range . Applications: Twisted-pair cables are commonly used in local area networks (LANs), telephone systems, and home or office setups due to their low cost and ease of installation. Optical fiber is preferred for high-performance applications, backbone networks, and long-distance data transmission . Physical Characteristics: Twisted-pair cables are thicker and more flexible, while optical fibers are thin, fragile, and require specialized installation equipment . Signal Type: Twisted-pair cables transmit electrical signals, making them susceptible to crosstalk and electromagnetic interference. Optical fiber transmits optical signals, providing higher security and minimal signal loss over long distances . In summary, twisted-pair cables and optical fiber are distinct types of network cabling, each with unique materials, signal transmission methods, and use cases. Twisted-pair is copper-based and electrical, while optical fiber is glass or plastic-based and optical.