📖 7. Transmission Media

📖 From Data Communication and Networks • 169 questions available

About 7. Transmission Media

Transmission media are the physical pathways that carry signals between network devices, broadly classified into guided (wired) and unguided (wireless) categories. Guided media include twisted-pair cables for LANs, coaxial cables for broadband, and fiber-optic cables for high-speed backbones, each offering different trade-offs in cost, bandwidth, attenuation, and immunity to electromagnetic interference, forming the tangible foundation of any wired network installation.

Unguided media transmit electromagnetic waves through air, vacuum, or water without physical conductors, encompassing radio waves, microwaves, and infrared light for mobile and satellite communications. Selecting the appropriate medium depends on factors like distance, required data rate, environmental conditions, and budget; understanding propagation characteristics, antenna types, and regulatory constraints is essential for designing reliable wireless links and avoiding signal degradation or legal violations.

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🔄 Last updated: 2026-07-31