Communication Systems Overview
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Questions and Answers

Which of the following are examples of wire-based transmission media?

  • Optical Fiber Cable (correct)
  • Twisted Pair Cable (correct)
  • Radio Wave
  • Coaxial Cable (correct)

    • In wireless transmission, the communicating devices are connected through wires.

    False (B)

    What is the process called where a digital signal is converted into its analog form?

    Modulation

    A ______ is used to perform modulation and demodulation for data transmission.

    <p>modem</p> Signup and view all the answers

    Match the following transmission media with their corresponding categories:

    <p>Twisted Pair Cable = Wire-based Microwave = Wireless Optical Fiber Cable = Wire-based Radio Wave = Wireless</p> Signup and view all the answers

    Which of the following is NOT an example of a transmission medium?

    <p>Computer (B)</p> Signup and view all the answers

    Analog signals are continuously varying in nature.

    <p>True (A)</p> Signup and view all the answers

    What is the main difference between wire-based and wireless transmission media?

    <p>Wire-based transmission media use physical cables to transmit data, while wireless transmission media use electromagnetic waves to transmit data through the air.</p> Signup and view all the answers

    Which of the following are examples of analog signals?

    <p>A radio wave broadcast (A), The temperature reading on a thermometer (B)</p> Signup and view all the answers

    Digital signals are less susceptible to noise interference compared to analog signals.

    <p>True (A)</p> Signup and view all the answers

    What is the primary characteristic that distinguishes analog signals from digital signals?

    <p>Analog signals represent continuous values, while digital signals represent discrete values.</p> Signup and view all the answers

    The pattern of a digital signal is referred to as a ______ wave.

    <p>square</p> Signup and view all the answers

    Match the communication resources with their descriptions:

    <p>Broadband = High-speed internet access Co-axial cable = A type of cable used for broadband internet Optical fiber cable = A type of cable providing extremely high data transmission speeds Twisted pair cable = Another type of cable used for broadband internet</p> Signup and view all the answers

    Which of the following is NOT a key advantage of digital signals?

    <p>Wider bandwidth (A)</p> Signup and view all the answers

    What is one of the main advantages of having a computer network?

    <p>All of the above (D)</p> Signup and view all the answers

    What does the term "broadband" refer to in the context of internet access?

    <p>Broadband refers to high-speed internet access, typically with a data transmission rate exceeding 256 Kbps.</p> Signup and view all the answers

    A Local Area Network (LAN) is usually confined to a small area like an office building.

    <p>True (A)</p> Signup and view all the answers

    Communication resources can only be used directly, without the participation of any technology.

    <p>False (B)</p> Signup and view all the answers

    What is the primary purpose of a Personal Area Network (PAN)?

    <p>To connect devices within a close proximity, typically within 20 to 30 feet, for communication.</p> Signup and view all the answers

    A ______ connects multiple local area networks or campus area networks together, covering a larger geographical region.

    <p>Metropolitan Area Network (MAN)</p> Signup and view all the answers

    Which type of network is most suitable for communication between devices in a single room?

    <p>PAN (B)</p> Signup and view all the answers

    Match the network types to their typical geographical coverage:

    <p>PAN = Within approximately 20-30 feet LAN = Within an office building or lab building CAN = Within a college campus or office complex MAN = Between 5 and 50 kilometers</p> Signup and view all the answers

    Which topology is characterized by a single transmission medium shared by all terminals?

    <p>Multipoint Topology (Bus Topology) (C)</p> Signup and view all the answers

    In a Ring Topology, data flows in two directions around the ring.

    <p>False (B)</p> Signup and view all the answers

    Which of the following is NOT a key component of a communication system?

    <p>Transmitter (D)</p> Signup and view all the answers

    A computer network is solely used for transmitting text data.

    <p>False (B)</p> Signup and view all the answers

    What is the main advantage of a Complete Topology?

    <p>It is the fastest way to transfer data between two computers.</p> Signup and view all the answers

    What is the primary advantage of a computer network?

    <p>Sharing resources, including computers, peripherals, and data.</p> Signup and view all the answers

    A ______ topology is a combination of two or more different topologies.

    <p>hybrid</p> Signup and view all the answers

    Match the topology with its primary characteristic:

    <p>Ring Topology = Data travels in a single direction Complete Topology = Point-to-point links between all computers Hybrid Topology = Combination of two or more topologies Multipoint Topology (Bus Topology) = Single shared transmission medium</p> Signup and view all the answers

    A ______ is a collection of interconnected communication networks that work together.

    <p>communication system</p> Signup and view all the answers

    Which of the following is NOT an advantage of Bus Topology?

    <p>Centralized control (A)</p> Signup and view all the answers

    Match the network type with its typical coverage area:

    <p>PAN = Personal area network, typically within a few meters LAN = Local area network, typically within a building or campus CAN = Campus area network, typically within a university campus MAN = Metropolitan area network, typically within a city WAN = Wide area network, spanning across countries or continents</p> Signup and view all the answers

    A central host computer is essential for data transmission in a Complete Topology.

    <p>False (B)</p> Signup and view all the answers

    What network topology connects all devices directly to a central hub?

    <p>Star (A)</p> Signup and view all the answers

    What is the primary disadvantage of Ring Topology when adding a new computer?

    <p>It delays communication.</p> Signup and view all the answers

    In a ring topology, data travels in a circular path, requiring a connection between the first and last devices.

    <p>True (A)</p> Signup and view all the answers

    Give one example of a real-world application that uses a WAN.

    <p>A company with branches across the globe using a network to connect its employees.</p> Signup and view all the answers

    Which of these companies provide Broadband services?

    <p>All of the above (E)</p> Signup and view all the answers

    Wi-Fi stands for 'wireless fidelity' and enables wireless data transmission.

    <p>True (A)</p> Signup and view all the answers

    What is the primary function of a computer network?

    <p>Sharing resources and facilitating data transmission between interconnected computers, peripherals, and terminals.</p> Signup and view all the answers

    Bluetooth uses radio frequency bandwidth for wireless communication between devices within a short range of ______ meters.

    <p>100</p> Signup and view all the answers

    Match the following technologies with their primary uses:

    <p>Broadband = High-speed internet access Wi-Fi = Wireless data transmission over short distances Bluetooth = Wireless communication between low-power devices Computer Network = Interconnected systems for resource sharing and data transmission</p> Signup and view all the answers

    What is a benefit of using Wi-Fi?

    <p>All of the above (D)</p> Signup and view all the answers

    A personal computer needs a Bluetooth adapter to communicate with Bluetooth devices like keyboards and mobile phones.

    <p>True (A)</p> Signup and view all the answers

    Why was the need for computer networks recognized during the Cold War?

    <p>The Cold War highlighted the urgency of fast and reliable communication, using electronic text, to relay critical information to armed forces.</p> Signup and view all the answers

    Study Notes

    Introduction

    • Technology connects people globally
    • Internet facilitates communication
    • BSNL aims to connect India effectively
    • Personal computers provide direct access to information and connect users globally

    Communication System

    • A communication system integrates multiple networks for efficient communication between sources and destinations
    • Key elements include:
      • Network Components
      • Transmission Media
      • Transmission Signals
      • Communication Resources

    Network Components

    • Components facilitate effective communication from source to destination
    • Involved in data transfer
    • Data can be analog or digital
    • Essential elements include: Sender, Medium, Receiver

    Transmission Media

    • Two categories:
      • Wire-based: Cables connect devices (Twisted Pair, Coaxial, Optical Fiber)
      • Wireless: Electromagnetic waves transmit signals (Radio, Microwave, Satellite)

    Transmission Signals

    • Data transmission occurs via electrical signals (either analog or digital)
    • Analog signals are continuous and continuously variable (e.g., sound waves, video signals)
    • Digital signals are discrete and represent data using 0s and 1s (e.g., computer data, digital clocks)

    Communication Resources

    • Resources enable communication between devices
    • Broadband, Wi-Fi, Bluetooth are examples of communication resources
    • Broadband internet access is high-speed and often uses optical fiber
    • Wi-Fi allows wireless data exchange through computers and mobile devices
    • Bluetooth enables short-range wireless communication for devices

    Network Topology

    • Network topology describes the arrangement of network components
    • Physical topology refers to physical layout (cable placement)
    • Logical topology defines data flow (independent of physical layout)
    • Various topologies include: Star, Ring, Complete, Hybrid, Multipoint

    Computer Network

    • Interconnected computers or terminals
    • Share resources, facilitate data transmission
    • Important for communication and data transfer
    • Advantages: sharing information, staying updated on world events, resource sharing, facilitating interactions

    Types of Computer Networks

    • Personal Area Network (PAN): Short range communication among devices (e.g., Bluetooth)
    • Local Area Network (LAN): Connects devices within a limited geographical area (e.g., office, lab)
    • Campus Area Network (CAN): Connects multiple LANs within a campus
    • Metropolitan Area Network (MAN): Bigger than LAN, smaller than WAN, covers a city or metropolitan area
    • Wide Area Network (WAN): Wide geographical area, connects across countries (e.g., Internet)

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    Description

    Explore the fundamentals of communication systems and how different networks facilitate global connectivity. This quiz covers the essential components, transmission media, and signals that form the backbone of effective communication.

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