transmission media
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Transmission media in Computer NetworksTRANSCRIPT
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Transmission Media
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Figure 7.1 Transmission medium and physical layer
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Figure 7.2 Classes of transmission media
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Figure 7.3 Twisted-pair cable
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Twisted Pair Provide protection against cross talk(noise) One wire-signals Second wire-Ground reference
Twisting increases probability of both the wires are effected by noise.
Therefore no of twists per unit length determines the quality of cable.
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Figure 7.4 UTP and STP cables
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Table 7.1 Categories of unshielded twisted-pair cables
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Figure 7.5 UTP connector
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Coaxial cable
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Categories of coaxial cables
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Figure 7.10 Fiber optics: Bending of light ray