Computer Networks Quiz
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What is the definition of a computer network?

Two or more connected computers that share a resource such as data, a printer, an internet connection, applications, or a combination of these.

Which of the following are the three most common types of networks?

  • Wireless Area Network (WAN)
  • Metropolitan Area Network (MAN) (correct)
  • Wide Area Network (WAN) (correct)
  • Local Area Network (LAN) (correct)
  • Internet Protocol (IP)

    • What is the main function of a Local Area Network (LAN)?

  • To allow many users to access high-bandwidth media (correct)
  • To connect geographically dispersed networks
  • To connect devices within a limited geographic area (correct)
  • To provide full-time connectivity to local services (correct)

    • What is the main difference between a Metropolitan Area Network (MAN) and a Wide Area Network (WAN)?

    <p>MANs connect networks in a city, while WANs connect networks across a larger area (D)</p> Signup and view all the answers

    How do bridges filter network traffic?

    <p>Bridges filter traffic by looking only at the MAC address.</p> Signup and view all the answers

    A bridge can analyze incoming frames and forward them based on addressing information.

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

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

    <p>Very high bandwidth capacity (B)</p> Signup and view all the answers

    What is the main function of a network hub?

    <p>A hub connects your PCs and peripherals.</p> Signup and view all the answers

    What is the purpose of a network operating system (NOS)?

    <p>A network operating system is required for most PCs to provide the connections they need.</p> Signup and view all the answers

    What is the main advantage of the star topology?

    <p>It is easy to modify and add new computers to a star network without disturbing the rest of the network.</p> Signup and view all the answers

    What is the main disadvantage of the ring topology?

    <p>Failure of one computer on the ring can affect the whole network.</p> Signup and view all the answers

    What is the definition of bandwidth?

    <p>Bandwidth is defined as the amount of information that can flow through a network connection in a given period of time.</p> Signup and view all the answers

    What is the main function of the Transport Layer in the OSI reference model?

    <p>Ensures reliable and ordered delivery of data between two hosts (D)</p> Signup and view all the answers

    Which of the following layers in the OSI model is responsible for addressing the communication between two systems that might be geographically separated network?

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

    What is the main purpose of TCP/IP?

    <p>TCP/IP is the basic communication language or protocol of the Internet.</p> Signup and view all the answers

    What is the function of the subnet mask in IP addressing?

    <p>To determine which portion of the IP address represents the network and which portion represents the host (D)</p> Signup and view all the answers

    What is the main difference between a straight-through cable and a crossover cable?

    <p>A crossover cable has one end with the orange set of wires switched with the green set.</p> Signup and view all the answers

    Fiber-optic cable is more susceptible to electromagnetic interference compared to other networking media.

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

    What is the main purpose of a router?

    <p>A router makes decisions regarding the best path for the delivery of data on the network.</p> Signup and view all the answers

    What is the function of a patch panel?

    <p>Patch panels are convenient groupings of RJ-45 jacks, providing connectivity or conducting paths.</p> Signup and view all the answers

    What is the purpose of the Application Layer in the OSI model?

    <p>The application layer provides network services to the user's applications.</p> Signup and view all the answers

    Which of these is an example of an Application Layer service?

    <p>Email, file transfer, client/server (A)</p> Signup and view all the answers

    What is the purpose of the Presentation Layer in the OSI model?

    <p>The Presentation Layer ensures that the information that the application layer of one system send out can be read by the application layer of another system.</p> Signup and view all the answers

    Which of the following is a common Layer 6 standard for data formatting?

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

    What is the main function of the Session Layer in the OSI model?

    <p>The Session Layer establishes, manages, and terminates sessions between two communicating hosts.</p> Signup and view all the answers

    The OSI reference model is considered a hierarchical model, with each layer building upon the services provided by the layer below it.

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

    What is the main advantage of using a layered approach to network communication?

    <p>It breaks network communication into smaller, simpler parts.</p> Signup and view all the answers

    The OSI reference model is a de facto standard, meaning it is widely accepted and used by network vendors and organizations.

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

    What is the purpose of peer-to-peer networking?

    <p>Participants that make a portion of their resources directly available to other network participants without the need for central coordination instances.</p> Signup and view all the answers

    Study Notes

    Network Topologies

    • Star Topology: Network fails if the central hub fails. Requires a device at the center to rebroadcast traffic. More cable is needed compared to other topologies.

    • Ring Topology: Each computer connects to the next, forming a ring. All computers retransmit received messages. Not susceptible to signal loss like a bus topology. Token passing is often used in ring networks. A token circulates until a device needs to send data, modifying the token to include the information and destination address.

    • Bus Topology: Heavy traffic slows the network down. Any computer can transmit at any time, without coordination. Loss of a cable or faulty device can disrupt the entire network.

    • Mesh Topology: Distinguished by redundant links between devices. Offers high tolerance to failure because of multiple paths for data transmission. Very expensive and difficult to manage.

    LANs, MANs, and WANs

    • Local Area Network (LAN): Relatively small geographic area. Used for sharing files, printers, and making internal communication seamless. Connects computers in a business or building.

    • Metropolitan Area Network (MAN): Covers a larger geographic area than a LAN (e.g., a city). Connects multiple LANs within a metropolitan area.

    • Wide Area Network (WAN): Largest network topology, spans large geographic areas (e.g., across countries or continents). Used by businesses to connect offices in different locations.

    Network Communication

    • How networks work: Devices communicate by transmitting information in small electrical pulses (packets). Each packet includes the source and destination addresses.

    • Protocols: Protocols (e.g., CSMA/CD) ensure efficient data transmission and prevent collisions.

    Importance of Bandwidth

    • Bandwidth: The amount of data that can be transmitted through a network connection in a given period.

    • Importance: Bandwidth is crucial, as it directly impacts the speed and capacity of the network. High bandwidth enables faster transmission and processing.

    Components of a Network

    • PCs and peripherals: Computers and devices like printers.

    • Network cables: Connect devices to the network.

    • Network equipment: Hubs, routers, switches, and patch panels.

    • Network operating system (NOS): Manages network resources.

    Network Layers (OSI Model)

    • Layer 7 (Application): Handles user interaction, e.g., email, file transfers.

    • Layer 6 (Presentation): Formats data for different systems.

    • Layer 5 (Session): Manages sessions between applications.

    • Layer 4 (Transport): Ensures data delivery. Controls flow to guarantee the integrity of the delivery of data.

    • Layer 3 (Network): Routes data based on addresses. Determines which pathway best suits to transport data.

    • Layer 2 (Data Link): Handles transmission between devices connected to the physical network interface.

    • Layer 1 (Physical): Transmits bits as electrical signals.

    Network Cable Types

    • Unshielded Twisted Pair (UTP): Common affordable cabling option. Uses twisted pairs of wires to reduce crosstalk.

    • Shielded Twisted Pair (STP): Shielded pairs of wires to reduce electromagnetic interference. More expensive than UTP.

    • Screened Twisted Pair (ScTP): Hybrid of both UTP and STP. Offers better protection against interference and electrical noise.

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    Related Documents

    Network Topologies PDF

    Description

    Test your knowledge on computer networks with this quiz covering essential concepts such as LANs, WANs, network topologies, and the OSI model. Answer questions about the functions and advantages of various networking components. Assess your understanding of bandwidth and network operating systems.

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