Title: Transmission Media
1Chapter 7
TransmissionMedia
2Figure 7.1 Transmission medium and physical
layer
3Figure 7.2 Classes of transmission media
47.1 Guided Media
Twisted-Pair Cable Coaxial Cable Fiber-Optic
Cable
5Figure 7.3 Twisted-pair cable
6Figure 7.4 UTP and STP
7Table 7.1 Categories of unshielded twisted-pair
cables
8Figure 7.5 UTP connector
9Figure 7.6 UTP performance
10Figure 7.7 Coaxial cable
11Table 7.2 Categories of coaxial cables
12Figure 7.8 BNC connectors
13Figure 7.9 Coaxial cable performance
14Figure 7.10 Bending of light ray
15Figure 7.11 Optical fiber
16Figure 7.12 Propagation modes
17Figure 7.13 Modes
18Table 7.3 Fiber types
19Figure 7.14 Fiber construction
20Figure 7.15 Fiber-optic cable connectors
21Figure 7.16 Optical fiber performance
227.2 Unguided Media Wireless
Radio Waves Microwaves Infrared
23Figure 7.17 Electromagnetic spectrum for
wireless communication
24Figure 7.18 Propagation methods
25Table 7.4 Bands
26Figure 7.19 Wireless transmission waves
27Figure 7.20 Omnidirectional antennas
28Note
Radio waves are used for multicast
communications, such as radio and television, and
paging systems.
29Figure 7.21 Unidirectional antennas
30Note
Microwaves are used for unicast communication
such as cellular telephones, satellite networks,
and wireless LANs.
31Note
Infrared signals can be used for short-range
communication in a closed area using
line-of-sight propagation.