End of Course Wrap Up-1

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CGS 3285Computer Network Concepts
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FINAL GRADES

• Grading Based on
• Homework/Quizzes 10 ( 40 pts)
• First Midterm 25 (100 pts)
• Second Midterm 30 (120 pts)
• Final Exam 35 (140 pts)
• Grading Scale
• A 90 - 100 (360 - 400 pts)
• B 80 - 89 (320 - 359 pts)
• C 70 - 79 (280 - 319 pts)
• D 60 - 69 (240 - 279 pts)
• F lt 60 (lt 240 pts)

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COURSE OUTLINE

• Chapter 2 - Understanding Telecommunications
• Chapter 3 - Basic Data Communications Concepts
• Chapter 4 - Data Interfaces and Transmission
• Chapter 5 - Data Communications Efficiency
• Chapter 6 - Data Integrity and Security
• Chapter 7 - Architectures and Protocols
• Chapter 8 - Data Transport Networks

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COURSE CONTENT LEVELS

• We looked at data comm. from a variety of
  perspectives
• Historical, technical, application, economic,
  architecture
• Learned course material on several levels
• Vocabulary
• What is the definition of a term?
• Conceptual
• What does the definition mean?
• What is it? What does it do? How is it done?
• Integration
• How are multiple concepts related or different?
• Application
• How are concepts used to solve a problem?

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EVOLUTION OF DATA COMMUNICATION

• Direct cabling to host
• Parallel vs. Serial Connections
• Point-to-Point leased line services
• Dial up over the Public Switched Network
• Hierarchical Networks
• SNA Multipoint Networks
• Built using dedicated services
• Data Transport Networks
• Local Area Networks Ethernet, Token Ring
• Wide Area Networks X.25, IP, Frame Relay, ATM

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EVOLUTION OF DATA COMMUNICATION
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CHANGES IN TRANSMISSION

• Analog to Digital
• Modulation Techniques
• Interface Standards
• Asynchronous to Synchronous
• Character to Block Transmission
• Simplex Half-Duplex to Full Duplex
• New Transmission Media
• Twisted Pair
• Coaxial Cable
• Satellite Microwave
• Fiber Optics
• Wireless

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ANCILLARY IMPROVEMENTS

• Better Character Codes
• Morse, Baudot, ASCII, EBCDIC, UniCode
• Improvements in Efficiency
• Multiplexers
• FEPs Line Sharing Devices
• Data Compression
• Buffering and Flow Control
• Data Integrity
• Parity, Checksums, Forward Error Correction
• Data Security
• Encryption, Digital Signatures, Firewalls

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CHANGES IN COMPUTING PARADIGMS

• Batch Processing (Remote Job Entry)
• Terminal to Host
• Client / Server
• Peer-to-Peer

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ARCHITECTURES AND PROTOCOLS

• OSI Model
• Seven Layers
• Upper Layers - application oriented
• Lower Layers - focused on data communication
• Other Models
• SNA, Internet
• Using only lower layers we create data transport
  networks
• LANs - typically Data Link and Physical Layers
• WANs - typically Network, Data Link and Physical
• Protocol stacks help us understand the data
  communication process

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NETWORKING CHOICES
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THE BIG PICTURE

• A Communications Revolution
• Migration to digital and wireless transmission
• Increases in transmission speeds transmission
  needs
• Changes in computing paradigms
• Convergence of voice/data
• New transmission media technologies
• Wireless internet access (G3) from cell phones
• Over 140 million cell phone users today
• The Internet Global Connections
• Content / Bandwidth explosion on the horizon

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FINAL EXAM

• Wednesday April 23, 1000 - 1250
• Same class room
• It will be comprehensive
• 145 Points Total
• 90 points from chapters 7, 8 10 (ATM)
• 50 points from previous material
• 5 point question similar to number problem from
  MT1
• Format - similar to midterms
• T/F, FIB, MC, MAMC
• essays and some number problems
• simple calculators are allowed
• should take 1-2 hours