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Computer Networks Unit 1 & 2 Quiz
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Computer Networks Unit 1 & 2 Quiz

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Questions and Answers

What type of network topology is characterized by a direct connection between each network node?

  • Ring Topology
  • Bus Topology
  • Mesh Topology (correct)
  • Star Topology

    • Which protocol is primarily used for error detection and correction in the Data Link Layer?

  • Hamming Codes (correct)
  • TCP
  • CSMA/CD
  • UDP

    • Which layer of the OSI model is responsible for establishing, managing, and terminating communication sessions?

  • Presentation Layer
  • Session Layer (correct)
  • Transport Layer
  • Network Layer

    • What is the main purpose of subnetting in IP addressing?

    <p>To manage the IP address allocation more efficiently</p> Signup and view all the answers

    In which transport protocol does the three-way handshake process occur?

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

    Which of the following accurately describes a feature of IPv6 compared to IPv4?

    <p>IPv6 supports multicast but not broadcast</p> Signup and view all the answers

    Which approach is used by ALOHA protocols to manage data collisions?

    <p>Random delay before retransmission</p> Signup and view all the answers

    Which method is NOT a focus of the Transport Layer?

    <p>Routing decisions</p> Signup and view all the answers

    Which of the following is NOT a goal of computer networks?

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

    In what way do computer networks facilitate business and commerce?

    <p>Allowing online banking and e-commerce transactions</p> Signup and view all the answers

    Which application of computer networks supports remote patient monitoring?

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

    What is one main benefit of centralized data storage in computer networks?

    <p>Prevention of data loss</p> Signup and view all the answers

    Which of these components is essential in a data communication system?

    <p>The medium for transmission</p> Signup and view all the answers

    What is a significant advantage of having alternate paths in computer networks?

    <p>Improved reliability and redundancy</p> Signup and view all the answers

    Which application of computer networks supports virtual classrooms?

    <p>E-learning platforms</p> Signup and view all the answers

    What is the role of a firewall in computer networks?

    <p>To protect the network by controlling incoming and outgoing traffic</p> Signup and view all the answers

    Which transmission mode allows communication in both directions simultaneously?

    <p>Full duplex</p> Signup and view all the answers

    What is a characteristic of the simplex transmission mode?

    <p>Can only send data in one direction</p> Signup and view all the answers

    What must a network ensure for reliable performance?

    <p>Delivery &amp; accuracy, performance, reliability, and security</p> Signup and view all the answers

    In a half duplex transmission, what happens when one device is transmitting?

    <p>The other device can only receive</p> Signup and view all the answers

    The performance of a network can be measured by which of the following?

    <p>Both A and B</p> Signup and view all the answers

    What is NOT a component of the protocol in a network?

    <p>Power supply</p> Signup and view all the answers

    Which communication setup is compared to a one-lane road?

    <p>Half duplex</p> Signup and view all the answers

    What aspect of a network relates to protecting data from unauthorized access?

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

    What is a significant disadvantage of using a tap in network configuration?

    <p>All transmission stops with a fault in the bus cable.</p> Signup and view all the answers

    Which of the following best describes a ring topology?

    <p>Each device has a dedicated point-to-point connection only with two adjacent devices.</p> Signup and view all the answers

    What characterizes a Local Area Network (LAN)?

    <p>It is limited to a few kilometers.</p> Signup and view all the answers

    What is a common disadvantage of a ring topology?

    <p>A break can disable the entire network.</p> Signup and view all the answers

    Which network type typically covers an area smaller than a WAN but larger than a LAN?

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

    What is a characteristic of a point-to-point connection?

    <p>It provides a dedicated link between two devices.</p> Signup and view all the answers

    What defines a multipoint connection?

    <p>A single link that connects multiple devices.</p> Signup and view all the answers

    Which topology uses a dedicated point-to-point link to only a central controller?

    <p>Star Topology</p> Signup and view all the answers

    What is a significant disadvantage of mesh topology?

    <p>Installation and reconnection are difficult.</p> Signup and view all the answers

    Which of the following is NOT an advantage of star topology?

    <p>Dependency on a central hub.</p> Signup and view all the answers

    How is data transmitted in a star topology?

    <p>Firstly to the hub, which then forwards to the destination device.</p> Signup and view all the answers

    Which topology uses a single cable as a backbone to connect devices?

    <p>Bus Topology</p> Signup and view all the answers

    What mathematical formula is used to determine the number of duplex-mode links needed in a mesh topology?

    <p>$n(n - 1)/2$</p> Signup and view all the answers

    Study Notes

    Overview of Computer Networks

    • A computer network enables communication between autonomous digital devices, allowing data exchange via wired or wireless connections.
    • Primary goals include facilitating communication, resource sharing, centralized data storage, cost efficiency, and enhancing reliability through redundancy.

    Goals of Computer Networks

    • Communication: Supports video conferencing, emails, and instant messaging for efficient interaction.
    • Resource Sharing: Enables sharing of hardware (e.g., printers) and software resources among users.
    • Data Storage: Centralized systems allow easy data access, backup, and recovery.
    • Cost Efficiency: Reduces operational costs by minimizing hardware and software duplication.
    • Reliability: Implements alternate paths and redundant systems for failure management.

    Applications of Computer Networks

    • Business: E-commerce, online banking, and remote work facilitate global collaboration.
    • Education: E-learning platforms and virtual classrooms for enhanced access to education.
    • Healthcare: Telemedicine and remote monitoring through electronic health records.
    • Government: E-governance facilitating secure communication and online public services.
    • Entertainment: Online gaming, streaming services, and social media engagement.
    • Scientific Research: Data sharing and collaboration among institutions globally.
    • Travel and Hospitality: Services like online ticket booking and GPS navigation.

    Data Communication Fundamentals

    • Components: Involves message (data), sender (device sending the message), receiver (device receiving it), transmission medium (path), and protocol (rules governing communication).
    • Transmission Modes: Classified into simplex (one-way), half-duplex (two-way, but not simultaneous), and full duplex (two-way, simultaneous communication).

    Network Criteria

    • Delivery & Accuracy: Ensures error-free data delivery to the correct destination.
    • Performance: Evaluated through transit times, response times, and efficiency of hardware/software.
    • Reliability: Frequency of failure and recovery time assessment.
    • Security: Protects data from unauthorized access and damage.

    Connection Types

    • Point-to-Point: Dedicated link between two devices, using wires or other media.
    • Multipoint: Single link shared by multiple devices, also known as multidrop.

    Network Topologies

    • Physical Topology Definition: Geometric representation of network links and devices.

    Mesh Topology

    • Each device has direct links to every other device.
    • Advantages: No traffic problems, robust, easy fault isolation.
    • Disadvantages: Difficult installation; expensive due to extensive wiring.

    Star Topology

    • Devices connected to a central hub/controller.
    • Advantages: Less expensive, easy to install and troubleshoot.
    • Disadvantages: Entire network relies on the hub; may require more cabling.

    Bus Topology

    • A single cable serves as the backbone connecting all devices.
    • Advantages: Easy installation, less cabling material used.
    • Disadvantages: Difficult fault isolation and potential for network failure due to cable faults.

    Ring Topology

    • Devices connected in a circular fashion; each device passes signals to its neighbors.
    • Advantages: Simple installation; easy fault isolation.
    • Disadvantages: A single point of failure can disrupt the entire network.

    Types of Networks

    • LAN (Local Area Network): Covers a small geographic area, like an office or building.
    • WAN (Wide Area Network): Encompasses large geographic areas, potentially nationwide or statewide.
    • MAN (Metropolitan Area Network): Intermediate size between LAN and WAN, covering a city.

    Layered Architecture of Networking

    • Unit-1: Focused on network concepts, OSI model, topology design, and physical layer media.
    • Unit-2: Medium access control, data link layer protocols, and methods of error handling.
    • Unit-3: Network layer principles, routing, and addressing with IPv4 and IPv6.
    • Unit-4: Transport layer design issues, connection management, and data handling techniques.
    • Unit-5: Application layer functions, including file management, email, and web applications.

    Transport Layer Protocols

    • TCP: Ensures reliable communication and includes connection management techniques.
    • UDP: Offers a simple approach for message transmission without guarantees.

    Security and Cryptography

    • Overview of data compression techniques, symmetric and asymmetric encryption, including algorithms like DES and RSA.

    Conclusion

    • Understanding network concepts, protocols, and topologies is essential for implementing and managing efficient and secure communication systems.

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    Related Documents

    CN in 5 hours.pdf

    Description

    Test your knowledge on fundamental concepts of networks including their goals, architecture, and the OSI reference model. This quiz covers topics like network topology design, medium access control, and various protocols. Prepare to challenge your understanding of data link layers and transmission media in computer networks.

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