Computer Networks and Data Communication
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Questions and Answers

What is the primary goal of the OSI model?

  • To simplify network architecture
  • To provide a framework for building networks (correct)
  • To enable secure data transmission
  • To facilitate communication between different devices

    • What type of transmission uses a single channel to transmit multiple signals?

  • Multiplexing (correct)
  • Modulation
  • Singleplexing
  • Switching

    • What is the main purpose of error detection in data communication?

  • To reduce network congestion
  • To improve data transmission speed
  • To prevent data loss
  • To detect and correct errors (correct)

    • What is the difference between analog and digital data transmission?

    <p>Analog is continuous, digital is discrete</p> Signup and view all the answers

    What is the main advantage of packet-switching over circuit-switching?

    <p>More efficient use of network resources</p> Signup and view all the answers

    What is the primary function of the data link control layer?

    <p>Flow control and error detection</p> Signup and view all the answers

    What is the primary focus of the course CSE 231?

    <p>Computer Networks</p> Signup and view all the answers

    What topic is covered in the 'Switching techniques' section of the syllabus?

    <p>Network Communication</p> Signup and view all the answers

    What is the topic of the 'Data link control' section of the syllabus?

    <p>Error detection and correction</p> Signup and view all the answers

    What is the main theme of the 'Multiplexing' section of the syllabus?

    <p>Resource sharing</p> Signup and view all the answers

    What is the primary focus of the 'Data Transmission' section of the syllabus?

    <p>Sending data between devices</p> Signup and view all the answers

    What is the topic of the first lecture of the course CSE 231?

    <p>Introduction to Computer Networks</p> Signup and view all the answers

    What is the primary purpose of HTTP?

    <p>To transfer data over the internet</p> Signup and view all the answers

    What is the full form of Wi-Fi?

    <p>IEEE 802.11</p> Signup and view all the answers

    What is the primary function of TCP?

    <p>To control the transmission of data</p> Signup and view all the answers

    What is the full form of ISP?

    <p>Internet Service Provider</p> Signup and view all the answers

    What is the primary function of IP?

    <p>To transfer data over the internet</p> Signup and view all the answers

    What is the full form of IoT?

    <p>Internet Of Things</p> Signup and view all the answers

    Study Notes

    Introduction to Computer Networks

    • Computer networks are a crucial part of modern communication, enabling data exchange between devices
    • Objectives of computer networks include communication, resource sharing, and information sharing

    Data Communication

    • Data communication refers to the exchange of data between devices
    • Components of data communication include:
      • Sender
      • Receiver
      • Message
      • Medium
    • Data communication models include:
      • Simplex
      • Half-duplex
      • Full-duplex
    • Transmission media include:
      • Guided media (twisted pair, coaxial cable, fiber optic cable)
      • Unguided media (wireless, satellite)

    Network Criteria

    • Network criteria include:
      • Performance
      • Reliability
      • Security
      • Scalability
      • Quality of Service (QoS)

    Network Models

    • The Open System Interconnection (OSI) model is a 7-layer framework for network communication
    • OSI layers include:
      • Physical (layer 1)
      • Data link (layer 2)
      • Network (layer 3)
      • Transport (layer 4)
      • Session (layer 5)
      • Presentation (layer 6)
      • Application (layer 7)

    Data Transmission

    • Data transmission concepts include:
      • Analog and digital data transmission
      • Data transmission impairments (attenuation, distortion, noise)

    Data Encoding

    • Data encoding techniques include:
      • Digital data-digital signal
      • Analog data-digital signal
      • Digital data-analog signal
      • Analog data-analog signal
    • Signaling, encoding, and modulation are essential in data transmission

    Data Communications Interface

    • Data communications interface includes:
      • Asynchronous and synchronous transmission
      • Line configuration
      • Transmission modes and interfacing
    • Data link control includes:
      • Flow control
      • Error control
      • Error detection
      • Error correction
      • Forward error correction
    • High-Level Data Link Control (HDLC) is a protocol used for data link control

    Multiplexing and Switching

    • Multiplexing techniques include:
      • Frequency Division Multiplexing (FDM)
      • Time Division Multiplexing (TDM)
    • Switching techniques include:
      • Circuit-switching
      • Packet-switching

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    Description

    Test your knowledge of computer networks, data communication, transmission media, and network models. Covers OSI layers, transmission modes, and networking topologies.

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