Ch 3 CS Class 11

Important Easy Notes of Computer Science of Data Communications Ch 3 CS Class 11 written by Professor Mr. Syed Werasat Hussain Hashmi Suib. These notes are very helpful in the preparation of Computer Science for students of the 11th class and these are according to the paper patterns of all Sindh Book Boards.

Summary and Contents:
Topics which are discussed in the notes are given below:
  • Introduction to Data Communications
  • Describe and Explain the Modem and Analog Signal
  • Describe digital signal 
  • Modifying an analog Signal
  • Describe Frequency Modulation and Amplitude Modulation and Communication Media
  • Describe Guided Media and Unguided Media
  • Characteristics Under Consideration While Examining Cables
  • Guided Media: Twisted Pair Cable, Categories of Twisted Pair Cable, Unshielded Twisted Pair Cable and Categories of UTP.
  • Describe Unshielded Twisted Pair Connectors
  • Describe Advantages of Twisted-Pair Wiring and Disadvantages of Twisted-Pair Wiring.
  • Describe Coaxial Cable
  • Describe Coaxial Cable Connectors: BNC Cable Connector
  • Advantages of Coaxial Wiring and Disadvantages of Coaxial Wiring
  • Describe Fiber Optic Cable
  • Describe Fiber Optic Connectors
  • Physical Appearance of Fiber Optic Cable
  • Advantages of Fiber Optic Cables and Disadvantages of Fiber Optic Cables.
  • Comparison of Different Cable Types: Unguided Media and Radio Frequency Allocation
  • Describe Bluetooth
  • Factors Affecting Communications Among Devices
  • Transmission Rate: Frequency with Example
  • Describe Bandwidth
  • Line Configurations
  • Point-To-Point  
  • Multipoint
  • Serial & Parallel Transmission
  • Data Communications Ch 3 CS Class 11 Computer Science Sindh Textbook Boards.
  • Describe Serial Data Transmission  and Parallel Data Transmission.
  • Direction of Transmission: When two computers are in communication, data can flow in three ways:  Simplex  Half-duplex  Full-duplex.
  • Describe Simplex Transmission and Half – Duplex Transmission
  • Describe Full-Duplex Transmission
  • Transmission Mode: Asynchronous Versus: Synchronous, Asynchronous Transmission, Advantage and Disadvantage
  • Synchronous Transmission: Advantage and Disadvantage
  • Describe Multiplexing and Protocols
  • Describe Protocols Specify
  • Describe The OSI Model: Physical Layer, Data Link Layer, Transport Layer, Session Layer,  Presentation Layer, Application Layer.

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