Introduction to Computer Networks: Chapter One Quiz
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Questions and Answers

What is the primary function of a file and print server?

  • Make server side of client/server applications available to clients
  • Serve up web pages to clients
  • Manage user access to database resources
  • Manage user access and use of file and printer resources (correct)

    • How does an application server differ from a file and print server?

  • The application server manages fax traffic
  • The file and print server downloads database to the client making the request
  • The file and print server serves web pages
  • An application server only delivers results of a request to clients (correct)

    • What role do mail servers perform in a network environment?

  • Share fax boards among multiple clients
  • Enable users to store and secure information on the network
  • Manage fax traffic
  • Operate like application servers with separate server and client (correct)

    • Which type of server delivers web pages to clients in a network?

    <p>Web Server</p> Signup and view all the answers

    How does a web server differ from an application server in terms of data handling?

    <p>Web servers selectively download data from the server to the client</p> Signup and view all the answers

    What is the primary function of a directory services server in a network?

    <p>Enable users to locate, store, and secure information on the network</p> Signup and view all the answers

    What is the main purpose of a computer network?

    <p>To share information and resources among connected computers</p> Signup and view all the answers

    Which of the following is a characteristic of a computer network?

    <p>Allows for sharing resources from one computer to another</p> Signup and view all the answers

    What is the main function of a Personal Area Network (PAN)?

    <p>To facilitate communication among interconnected personal devices</p> Signup and view all the answers

    Which type of network is a PAN based on ownership?

    <p>Personal Area Network (PAN)</p> Signup and view all the answers

    In a PAN, what role can one device take up in terms of network connectivity?

    <p>Internet router for connecting to higher-level networks</p> Signup and view all the answers

    Which type of Personal Area Network uses a data cable as an example?

    <p><strong>Wired</strong> Personal Area Network</p> Signup and view all the answers

    What is the main purpose of the OSI reference model?

    <p>To ensure greater compatibility and interoperability between different types of networks</p> Signup and view all the answers

    In what year was the OSI reference model developed?

    <p>1984</p> Signup and view all the answers

    How many layers does the OSI reference model have?

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

    What is the function of the OSI Layer 1?

    <p>Physical layer - deals with electrical, mechanical, and functional connections to the network</p> Signup and view all the answers

    Which statement best describes the role of the OSI reference model in network communication?

    <p>It defines how information flows between different layers of network communication</p> Signup and view all the answers

    What is a key advantage of dividing the communication process into seven layers according to the OSI reference model?

    <p>Better understanding and management of network functions</p> Signup and view all the answers

    What is a key advantage of a star network topology?

    <p>Failure of the central unit doesn't affect the network</p> Signup and view all the answers

    In a ring topology, how is the signal passed among devices?

    <p>In one direction, from device to device</p> Signup and view all the answers

    What is a disadvantage of a ring topology?

    <p>Failure of a single computer brings down the entire network</p> Signup and view all the answers

    How are token ring networks commonly implemented regarding physical connection?

    <p>As a ring topology</p> Signup and view all the answers

    What is the main function of a repeater in a ring topology?

    <p>Regenerate received signals</p> Signup and view all the answers

    Why is star topology more expensive than linear bus topologies?

    <p>Requires more cable length</p> Signup and view all the answers

    Which layer ensures that information sent by one system's application layer is readable by another system's application layer?

    <p>Presentation layer</p> Signup and view all the answers

    What is the primary function of the Session layer?

    <p>Managing conversations between applications</p> Signup and view all the answers

    Which layer synchronizes dialogue between two hosts' presentation layers and manages their data exchange?

    <p>Session layer</p> Signup and view all the answers

    Which layer offers provisions for efficient data transfer and prevents two parties from attempting the same critical operation simultaneously?

    <p>Transport layer</p> Signup and view all the answers

    What is the role of the Transport layer in the OSI model?

    <p>Ensures correct delivery of data units to the receiving end</p> Signup and view all the answers

    Study Notes

    Introduction to Computer Networks

    • A computer network is a system of multiple computers connected to share information and resources.
    • Characteristics of a computer network:
      • Share resources from one computer to another
      • Connect devices to one computer and let others use them over the network

    Categories of Computer Networks

    • Based on size, ownership, and distance covered:
      • Personal Area Network (PAN)
        • Used for data transmission among devices like computers, phones, and tablets
        • Can be used for personal communication or connecting to a higher-level network and the Internet
      • Star topology:
        • Most popular way to connect computers in a workgroup network
        • Advantages: fault identification and isolation are easy, less expensive than mesh topology
        • Disadvantages: failure of the central unit causes whole network failure, requires more cable length

    Network Topologies

    • Ring Topology:
      • Nodes are connected by point-to-point connection to form a closed loop
      • Signal is passed along the ring in one direction, from device to device, until it reaches its destination
      • Each device incorporates a repeater to regenerate the received signal

    OSI Reference Model

    • Open Systems Interconnection (OSI) is the reference model for how applications can communicate over a network
    • Purposes of OSI reference model:
      • Ensure greater compatibility and interoperability between various network technologies
      • Describe how information makes its way from application programs to another network
      • Divide the problem of moving information into seven smaller and more manageable problems

    OSI Reference Model Layers

    • The process of communication between two endpoints in a network can be divided into seven distinct groups of related functions, or layers
    • Each communicating user or program is at a computer that can provide those seven layers of function

    Layer 6: Presentation

    • Ensures that the information sent by one system is readable by another system
    • Translates between multiple data formats if necessary
    • Provides encryption and compression of data
    • Examples: JPEG, MPEG, ASCII, EBCDIC, HTML

    Layer 5: Session

    • Defines how to start, control, and end conversations between applications
    • Controls and manages multiple bi-directional messages
    • Synchronizes dialogue between two hosts' presentation layers
    • Prevents two parties from attempting the same critical operation at the same time
    • Examples: SQL, ASP (AppleTalk Session Protocol)

    Layer 4: Transport

    • Accepts data from above, splits it into smaller units if needed, and passes them to the network layer
    • Ensures that the pieces arrive correctly at the other end
    • Examples: client-server applications like email, network printing, and the World Wide Web

    Servers

    • Types of servers:
      • File and Print Servers: manage user access and use of file and printer resources
      • Application Servers: make the server side of client-server applications and data available to clients
      • Web Servers: deliver web pages
      • Mail Servers: operate like application servers, managing email traffic
      • Fax Servers: manage fax traffic into and out of the network
      • Directory Services Server: enable users to locate, store, and secure information on the network

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    Description

    Test your knowledge on the basics of computer networks including the definition, characteristics, and functions of a computer network. Explore concepts such as sharing resources, file storage, and connectivity between multiple computers.

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