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Data Communication Network

This study guide covers computer networks and data communications, exploring components, transmission media, encoding, and more. Learn about bandwidth, types of signal, and media classification based on bandwidth for a comprehensive understanding.

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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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