Transmission media
Post on 26-May-2015
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Transmission media in Computer Networks
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Transmission Media
Figure 7.1 Transmission medium and physical layer
Figure 7.2 Classes of transmission media
Figure 7.3 Twisted-pair cable
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.
Figure 7.4 UTP and STP cables
Table 7.1 Categories of unshielded twisted-pair cables
Figure 7.5 UTP connector
Coaxial cable
Categories of coaxial cables
Figure 7.10 Fiber optics: Bending of light ray
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