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Data Communication Network

Data Communication Network. 331: STUDY DATA COMMUNICATIONS AND NETWORKS. 331: STUDY DATA COMMUNICATIONS AND NETWORKS. 1. Discuss computer networks (5 hrs) 2. Discuss data communications (15 hrs). 331.2: Discuss Data Communications. PERFORMANCE STANDARD

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Data Communication Network

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  1. Data Communication Network 331: STUDY DATA COMMUNICATIONS AND NETWORKS

  2. 331: STUDY DATA COMMUNICATIONS AND NETWORKS • 1. Discuss computer networks (5 hrs) • 2. Discuss data communications (15 hrs)

  3. 331.2: Discuss Data Communications • PERFORMANCE STANDARD • Given a network system, identify and illustrate the different data communications components clearly • Objectives: • Define elements of a communication system • Define data communications • Discuss various types of transmission media and their characteristics • Discuss encoding of information for transmission • Discuss types of signal & their characteristics • Relate data capacity of a channel and bandwidth • Classify media based on bandwidth • Discuss channel organization

  4. SKILL AREA 331.2.7 Classify media based on bandwidth

  5. Bandwidth • Bandwidth (BW) is that portion of electromagnetic spectrum occupied by a signal. • It is also the frequency range over which a receiver operates. • Widerbandwidth means more data can be transmitted • More specifically, bandwidth is the difference between the upper and lower frequency limit of the signal. BW=upper frequency-lower frequency

  6. Bandwidth • Ex: • A common used frequency range is 300Hz to 3 MHz. What is the width of this band? f1=300Hz; f2=3MHz; BW=f2-f1 BW=3000-300 BW=2.7MHz

  7. Bandwidth

  8. Bandwidth • Try it yourself; A television signal occupies a 6 MHz bandwidth. If the low frequency limit channel 2 is 54MHz, what is the upper frequency limit? Ans: 60MHz

  9. Types of transmission media

  10. CAT cable (UTP) characteristic

  11. Category 3 Class C Category 5 Class D Category 5E Category 6 Class E Category 7 Class F Bandwidth 16 MHz 100 MHz 100 MHz 200 MHz 600 MHz Cable Type UTP UTP/FTP UTP/FTP UTP/FTP SSTP Link Cost (Cat 5 =1) 0.7 1 1.2 1.5 2.2 Twisted Pair Categories and Classes

  12. Twisted Pair - Transmission Characteristics • Limited distance • Limited bandwidth (1MHz) • Limited data rate (100MHz) • Susceptible to interference and noise

  13. Coaxial cable • Compared to twisted-pair, coax provides greater bandwidth, and it also offers greater bandwidth for each channel. • Because it has greater bandwidth per channel, it supports a mixed range of services. Voice, data, and even video and multimedia can benefit from the enhanced capacity.

  14. Fiber Optic Cable • Single Mode Fiber Optic Cable • At distances up to 3 km, single mode fiber will deliver data rates up to 10 Gbps with a bandwidth of 20Ghz. • Single mode fiber's primary uses are full motion video and any applications requiring extremely high bandwidth.

  15. Fiber Optic Cable • Multimode Fiber Optic Cable • It can deliver data rates up to 1 Gbps. • For distances of 100 m or less, the bandwidth is virtually unlimited. Multimode fiber is used for voice, data, security, and video systems.

  16. Wireless BW table

  17. Exercise

  18. QUESTION?

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