Introduction1

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CGS 3285Computer Network ConceptsSpring
2004Rong Wang
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Syllabus Overview Our Goals

• Basic Concept of Data Communication and Computer
  Networking
• Understand some basic concept of data
  communication and computer networking
• Be able to describe various aspects of data
  communications networks and equipment
• Understand layers within the OSI network
  architecture model and be able to place network
  components (protocols, hardware, programs , etc.)
  with the appropriate network
• Understand TCP/IP model, internetworking with
  TCP/IP and internet application services.

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Syllabus Overview Time Date

• Class Times
• Mon Wed, 1030 1145AM, BA Room 116
• Other Dates
• Jan. 19 Martin Luther King. Jr. Day, No
  classes.
• Feb. 27 Withdrawal Deadline
• March 8 13 Spring Break, No classes.
• April 2026 Final Week
• Final Exam
• April 26, 1000AM ? 1250PM
• It will be comprehensive

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Syllabus Overview Text References

• Text Book
• Data Communications From Basics to Broadband,
  3rd Edition by William J. Beyda
• or
• Data Communications and Networking, 3rd Edition,
  Behrouz A. Forouzan (Optional)
• Reference Books (not required)
• Computer Networks and Internets, with Internet
  Applications, 4th Edition.
• Douglas E. Comer Ralph E. Droms, 2004 by
  Prentice Hall.
• Data and Computer Communications, 7th Edition,
• William Stallings, by Prentice Hall.

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Syllabus Overview - Grading

• Grading Based on
• Homework/Quizzes 10
• First Midterm 25
• Second Midterm 30
• Final Exam 35
• Grading Scale
• A 90 - 100
• B 80 - 89
• C 70 - 79
• D 60 - 69
• F lt 60

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Syllabus Overview (Cont. )

• Course website
• www.cs.ucf.edu/courses/cgs3285
• TA- Mr. Helpful
• Contact ?
• Hour ?
• Place ?

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Syllabus Overview (Cont.)

• Homework
• Must be submitted on due date, before class time.
  
• Late penalty
• 20 off each day
• 0 if answer keys are already posted online
• Tests Exams
• Closed book, closed notes
• T/F, Multiple Choice, Number Problems, Essay
• No calculators or hand held computing devices
• Please turn off all cell phones and pagers in
  class.
• Academic Behavior
• Cheating or other forms of academic dishonesty
  will not be tolerated
• http//www.goldenrule.sdes.ucf.edu/

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Why Study Data Communication and Networking?

• Change the way we do business and the way we live
• Require immediate access to accurate information
• Database, online shopping
• Enable long distance communication
• Internet, IP phone
• Access variable of information such as text,
  voice and image
• Email, messenger, video conference

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Overview of Data Communications

• What is communication?
• What is data communication?
• Basic components of data communication system

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What is Data Communication?

• Communications
• The exchange of information between individuals
  using a common set of symbols, signs, behavior or
  language.
• Objective Ability to share information over
  long distances
• High volume of information
• No loss of accuracy (also protected from prying
  eyes)
• Fast transmission rate
• Early attempts
• Voice Telegraph, Messengers / Runners, Signal
  Fires (mentioned by Homer in 1200 BE), Semaphores
  (Chappe brothers in France, 1793), Telegraph
  (first demonstrated in 1844 by Samuel Morse)
• Data
• Information presented in whatever forms is agreed
  upon by the parties creating and using data
• Data communications
• The exchange of data between two devices via some
  form of transmission medium such as a wire cable

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Overview of Data Communications (Cont. )

• What is communication?
• What is data communication?
• What is basic components of data communication
  system?

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A Data Communication Model

• Message
• Sender
• Receiver
• Medium
• Protocol

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Data Communication Techniques

• Data representation
• Bits and Bytes
• Character Codes
• Data transmission
• Signal encoding
• Direction of data flow
• Transmission Mode
• Parallel vs. Serial Transmission
• Asynchronous vs. Synchronous
• Line Topology
• Transmission media
• Transmission impairment and error detection
• Improve transmission efficiency

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Overview of Networking

• Point to point communication usually not
  practical
• Senders and receivers are very far apart
• Large set of devices may require a link to many
  of the others at various times
• Solutions is to attach each device to a
  communication network
• Network
• A set of devices connected by communication links
• Categories of network
• Wide-area Networks (WANs)
• Local-area Networks (LANs)
• Metropolitan-area Networks (MANs)

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Wide Area Network

• Generally cover a large geographical area
• Rely in part on common circuit carrier
• Alternative technologies
• Circuit switching
• Packet switching
• Frame Relay
• Asynchronous Transfer Mode (ATM)

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Local Area Networks

• Smaller scope
• Typically a building or a campus
• Usually privately owned
• Has higher data rates

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Metropolitan-area network

• Metropolitan Area Networks (MAN)
• Middle ground between LANs and WANs
• Private or public
• High speed
• Large Area

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The Internet

• internet
• Two or more networks can communicate with each
  other
• Internet
• A collaboration of more than hundreds of
  thousands interconnected networks

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Brief History of Internet

• Mid-1960s
• Standalone devices
• ARPA (Advanced Research Projects Agency) was
  interested in finding a way to connect computers
  to share information
• Backbones None - Hosts None
• 1967
• ARPA presented its ideas for ARPANET
• Backbones None - Hosts None
• 1969
• The first physical network was constructed
• Backbones 50Kbps ARPANET - Hosts 4
• 1972
• The first e-mail program was created by Ray
  Tomlinson of BBN
• Backbones 50Kbps ARPANET - Hosts 23
• 1973
• Development began on the protocol later to be
  called TCP/IP (by Vint Cerf and Bob Kahn)
• Backbones 50Kbps ARPANET - Hosts 23

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Internet Today
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Course Outline

• http//www.cs.ucf.edu/courses/cgs3285/spring2004/c
  gs3285_outline.htm