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Transmission Media презентация
Содержание
- 1. Transmission Media
- 2. NDSLab Copyright@2008 Figure 7.1 Transmission medium and physical layer
- 3. NDSLab Copyright@2008 Transmission Media By definition Broadly
- 4. NDSLab Copyright@2008 Figure 7.2 Classes of transmission media
- 5. NDSLab Copyright@2008 7-1 GUIDED MEDIA
- 6. NDSLab Copyright@2008 Figure 7.3 Twisted-pair cable
- 7. NDSLab Copyright@2008 Figure 7.4 UTP and STP cables Unshielded Twisted-Pair (UTP) Shielded Twisted-Pair (STP)
- 8. NDSLab Copyright@2008 Unshielded vs Shielded Twisted-Pair Cable
- 9. NDSLab Copyright@2008 Table 7.1 Categories of unshielded twisted-pair cables
- 10. NDSLab Copyright@2008 Figure 7.5 UTP connector
- 11. NDSLab Copyright@2008 Figure 7.6 UTP performance Gauge
- 12. NDSLab Copyright@2008 Figure 7.7 Coaxial cable
- 13. NDSLab Copyright@2008 Table 7.2 Categories of coaxial cables
- 14. NDSLab Copyright@2008 Figure 7.8 BNC connectors
- 15. NDSLab Copyright@2008 Figure 7.9 Coaxial cable performance
- 16. NDSLab Copyright@2008 Figure 7.10 Bending of light ray
- 17. NDSLab Copyright@2008 Figure 7.11 Optical fiber
- 18. NDSLab Copyright@2008 Figure 7.12 Propagation modes
- 19. NDSLab Copyright@2008 Figure 7.13 Modes
- 20. NDSLab Copyright@2008 Table 7.3 Fiber types
- 21. NDSLab Copyright@2008 Figure 7.14 Fiber construction
- 22. NDSLab Copyright@2008 Figure 7.15 Fiber-optic cable connectors
- 23. NDSLab Copyright@2008 Figure 7.16 Optical fiber performance
- 24. NDSLab Copyright@2008 7-2 UNGUIDED MEDIA:
- 25. NDSLab Copyright@2008 Figure 7.17 Electromagnetic spectrum for wireless communication
- 26. NDSLab Copyright@2008 Figure 7.18 Propagation methods
- 27. NDSLab Copyright@2008 Table 7.4 Bands
- 28. NDSLab Copyright@2008 Figure 7.19 Wireless transmission waves
- 29. NDSLab Copyright@2008 Figure 7.20 Omnidirectional antenna
- 30. NDSLab Copyright@2008 Radio waves are used for
- 31. NDSLab Copyright@2008 Figure 7.21 Unidirectional antennas
- 32. NDSLab Copyright@2008 Microwaves are used for
- 33. NDSLab Copyright@2008 Infrared signals can be
NDSLab Copyright@2008 Figure 7.1 Transmission medium and physical layer
Слайд 1Chapter 7
Transmission Media
長庚大學資訊工程學系 陳仁暉 副教授
Tel: (03) 211-8800 Ext: 5990
Email: jhchen@mail.cgu.edu.tw
URL: http://www.csie.cgu.edu.tw/~jhchen
Слайд 3NDSLab Copyright@2008
Transmission Media
By definition
Broadly defined as anything that can carry information
from a source to a destination.
e.g., air, twisted-pair cable, coaxial cable, fiber-optic cable, conductor, and so on.
Guided media
Provide a conduit from one device to another, include twisted-pair cable, coaxial cable, and fiber-optic cable.
e.g., air, twisted-pair cable, coaxial cable, fiber-optic cable, conductor, and so on.
Guided media
Provide a conduit from one device to another, include twisted-pair cable, coaxial cable, and fiber-optic cable.
Слайд 5NDSLab Copyright@2008
7-1 GUIDED MEDIA
Guided media, which are those that provide
a conduit from one device to another, include twisted-pair cable, coaxial cable, and fiber-optic cable.
Twisted-Pair Cable
Coaxial Cable
Fiber-Optic Cable
Topics discussed in this section:
Слайд 7NDSLab Copyright@2008
Figure 7.4 UTP and STP cables
Unshielded Twisted-Pair (UTP)
Shielded Twisted-Pair (STP)
Слайд 8NDSLab Copyright@2008
Unshielded vs Shielded Twisted-Pair Cable
Unshielded twisted-pair (UTP)
Shielded twisted-pair (STP)
Has a
metal foil or braided-mesh covering that encases each pair of insulated conductors.
Category
Electronic Industries Association (EIA) has developed standards to classify unshielded twisted-pair cable into seven categories. Table 7.1 shows these categories.
Connectors
Most common UTP connector is RJ-45 (RJ stands for registered jack).
Category
Electronic Industries Association (EIA) has developed standards to classify unshielded twisted-pair cable into seven categories. Table 7.1 shows these categories.
Connectors
Most common UTP connector is RJ-45 (RJ stands for registered jack).
Слайд 11NDSLab Copyright@2008
Figure 7.6 UTP performance
Gauge is a measure of the thickness
of the wire.
Слайд 24NDSLab Copyright@2008
7-2 UNGUIDED MEDIA: WIRELESS
Unguided media transport electromagnetic waves without
using a physical conductor. This type of communication is often referred to as wireless communication.
Radio Waves
Microwaves
Infrared
Topics discussed in this section:
Слайд 30NDSLab Copyright@2008
Radio waves are used for multicast communications, such as radio
and television, and paging systems.
Слайд 32NDSLab Copyright@2008
Microwaves are used for unicast communication such as cellular telephones,
satellite networks,
and wireless LANs.
Слайд 33NDSLab Copyright@2008
Infrared signals can be used for short-range communication in a
closed area using line-of-sight propagation.
