Computer Networking Topologies Quiz
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Questions and Answers

What is a major disadvantage of ring topology?

  • If a node fails, the entire network fails (correct)
  • Detecting a problem is complex
  • High data transmission speed
  • Can be easily expanded

    • Which statement accurately describes tree topology?

  • It is the least expensive topology available.
  • It combines elements of star and bus topologies. (correct)
  • It has no root node and is flat in structure.
  • Every node connects to every other node directly.

    • What is one of the main advantages of hybrid topology?

  • None of the topologies used can support error detection.
  • It is flexible and scalable. (correct)
  • It is strictly limited in scalability.
  • It is easy to design.

    • Why can point-to-point connections be considered more efficient than multipoint connections?

    <p>The entire channel capacity is reserved for dedicated use.</p> Signup and view all the answers

    Which of the following is a primary disadvantage of tree topology?

    <p>If the root node fails, the entire network collapses.</p> Signup and view all the answers

    Which characteristic does NOT apply to hybrid topology?

    <p>Easy to design initially.</p> Signup and view all the answers

    What is a characteristic of multipoint connections?

    <p>Allows simultaneous connections to a single transmitter.</p> Signup and view all the answers

    What is a common misconception about ring topology?

    <p>It has a fast data transmission speed.</p> Signup and view all the answers

    What is the primary purpose of a computer network?

    <p>To exchange information over the network</p> Signup and view all the answers

    Which factor does NOT contribute to the performance measurement of a network?

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

    What does packet loss indicate in a network?

    <p>Failure of one or more packets to reach their destination</p> Signup and view all the answers

    Which type of connection provides a dedicated link between two devices?

    <p>Point-to-point connection</p> Signup and view all the answers

    What does the application layer in the TCP/IP model primarily handle?

    <p>User interface specifications and application communication</p> Signup and view all the answers

    What does reliability in a network measure?

    <p>The frequency of failure and recovery time from failures</p> Signup and view all the answers

    Which protocol in the transport layer is known for being reliable and connection-oriented?

    <p>Transmission Control Protocol (TCP)</p> Signup and view all the answers

    What is the primary function of the Internet/Network Layer in the TCP/IP model?

    <p>Transporting packets from source to destination</p> Signup and view all the answers

    What is one of the main security issues faced in networks?

    <p>Protecting data from unauthorized access</p> Signup and view all the answers

    In a distributed processing network, what happens to tasks?

    <p>They are divided among multiple computers</p> Signup and view all the answers

    Which of the following statements accurately describes User Datagram Protocol (UDP)?

    <p>Prioritizes speed over accuracy, offering an unreliable service</p> Signup and view all the answers

    What does transit time refer to in network performance?

    <p>Time taken for a message to travel from one device to another</p> Signup and view all the answers

    What is the purpose of bit rate control in the physical layer of the network?

    <p>To determine the number of bits sent per second</p> Signup and view all the answers

    What functionality does the Stream Control Transmission Protocol (SCTP) provide?

    <p>Supports voice over the Internet and combines features of TCP and UDP</p> Signup and view all the answers

    Which layer of the TCP/IP model is responsible for process-to-process communication?

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

    Which of the following protocols is NOT typically associated with the application layer in the TCP/IP model?

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

    What is one of the main advantages of a Local Area Network (LAN)?

    <p>It is secure because there is no outside connection.</p> Signup and view all the answers

    Which network type connects multiple devices in a larger geographical area than a LAN but smaller than a WAN?

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

    What is a disadvantage of a Metropolitan Area Network (MAN)?

    <p>It can be expensive to set up and maintain.</p> Signup and view all the answers

    Which of the following statements about a Wide Area Network (WAN) is true?

    <p>It provides long-distance transmission of data.</p> Signup and view all the answers

    What is a primary function of a Local Area Network (LAN)?

    <p>Connecting devices in the same geographical area for resource sharing.</p> Signup and view all the answers

    Which of the following is NOT a characteristic of LANs?

    <p>They can experience significant security issues.</p> Signup and view all the answers

    What defines a Wide Area Network (WAN)?

    <p>It can cover large geographical regions, including countries and continents.</p> Signup and view all the answers

    What potential issue can occur with increased usage in a Metropolitan Area Network (MAN)?

    <p>Congestion and performance issues.</p> Signup and view all the answers

    What is the primary purpose of encryption in data transmission?

    <p>To maintain privacy of the information</p> Signup and view all the answers

    Which of the following best describes the function of the session layer in networking?

    <p>Creating communication channels called sessions</p> Signup and view all the answers

    What is the main function of the Internetworking Protocol (IP)?

    <p>To deliver packets from source to destination</p> Signup and view all the answers

    Which protocol is utilized to discover a device's MAC address from its IP address?

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

    Which of the following statements accurately describes TCP in the transport layer?

    <p>It ensures reliable, connection-oriented communication.</p> Signup and view all the answers

    What is the purpose of the Reverse Address Resolution Protocol (RARP)?

    <p>To find a device's IP address from its MAC address</p> Signup and view all the answers

    What role does flow control play in the transport layer?

    <p>It matches the sending rate to the receiver's processing speed.</p> Signup and view all the answers

    Which of the following is a characteristic of connectionless service in the transport layer?

    <p>There is no guarantee that packets will arrive in order.</p> Signup and view all the answers

    Which of the following best describes the Internet Control Message Protocol (ICMP)?

    <p>Sends control and error reporting messages</p> Signup and view all the answers

    What is the role of the Internet Group Message Protocol (IGMP)?

    <p>To send messages to multiple recipients simultaneously</p> Signup and view all the answers

    What is the primary function of the network layer?

    <p>To transport packets from source to destination</p> Signup and view all the answers

    Which function of the transport layer involves dividing messages into smaller segments?

    <p>Segmentation and reassembly</p> Signup and view all the answers

    Which model is independent and serves as a generic communication gateway between the network and the end user?

    <p>OSI Model</p> Signup and view all the answers

    In the context of data compression, what does the process achieve?

    <p>Reduces the number of bits transmitted</p> Signup and view all the answers

    What was the primary purpose of the TCP/IP model?

    <p>To promote communication between diverse networks</p> Signup and view all the answers

    Which of the following layers in the TCP/IP model encompasses both the physical and data link layers of the OSI model?

    <p>Network Access/Link Layer</p> Signup and view all the answers

    Study Notes

    Data Communication

    • Data communication is the transfer of data from a source to one or more receivers through a communication medium, following a set of rules (protocol).
    • Key components of a data communication system are message, sender/transmitter, receiver, transmission medium, and protocol.

    Data Representation Forms

    • Information transmitted can be text, numbers, images, audio, or video.
    • Text is represented as bit patterns (sequences of 0s and 1s).
    • Different sets of bit patterns code various symbols, like ASCII, or Unicode, used to represent text.
    • Numbers are represented directly in binary to simplify mathematical operations.
    • Images are composed of a matrix of pixels (picture elements), where each pixel is a small dot.
    • Image resolution affects representation quality and storage size.
    • Audio refers to recorded or broadcast sound or music. This information is often converted to digital or analogue signals.
    • Video encompasses recordings of pictures or movies; these may be continuous entities (e.g., a TV camera) or a combination of images for motion representation.

    Data Flow Methods

    • Data flow (transmission mode) defines the direction of information flow between devices.
    • Three transmission modes are Simplex, Half-duplex, and full duplex.
    • Simplex is unidirectional (one-way communication).
    • Half-duplex is bidirectional, but not simultaneous in either direction.
    • Full-duplex is bidirectional and allows simultaneous transmission and reception in both directions.

    Computer Network

    • A computer network connects multiple computing devices using a transmission medium (e.g., wires, cables, radio waves).
    • Each device is a node.
    • Networks are crucial for information exchange.
    • Network performance factors include response time, transit time, and delay.

    Network Criteria/Attributes

    • Performance metrics include response time (time between inquiry and response), transit time (time for a message to travel between devices), and delay (time taken for a packet to traverse from source to destination).
    • Reliability considers the frequency of failures, recovery time, and the network's ability to remain functional.
    • Security encompasses protecting data from unauthorized access or damage.
    • Throughput measures the amount of successful packet delivery within a set time period.
    • Packet loss occurs when one or more packets fail to reach their intended destination.

    Network Topologies

    • Topology defines how network components are interconnected.
    • Common topologies include Mesh, Star, Bus, Ring, Tree, and hybrid
    • Mesh: every node is connected to every other node.
    • Star: all nodes connect to a central hub.
    • Bus: nodes are connected along a single cable.
    • Ring: nodes form a closed loop.
    • Tree: hierarchical structure combining elements of bus and star topologies.
    • Hybrid: combines elements of other topologies.

    Network Types

    • Local Area Network (LAN) is a group of connected devices within a limited area (e.g., home, office, school). LANs support file and hardware resource sharing. The transmission speed of a LAN is higher than other network types.
    • Metropolitan Area Network (MAN) spans a broader area such as a city or a group of towns to connect multiple LANs. A MAN is typically used to provide fast data transmission between different locations in a city or a similar geographical area.
    • Wide Area Network (WAN) extends over a large geographical area (country, continent or the entire world). Internet and other global networks are examples of WANs. WANs are usually less efficient than LANs, and the transmission speed is lower.

    OSI/ISO Reference Model

    • The OSI model is a conceptual framework for how applications communicate over a network. It is a layered architecture that specifies how different protocols in each layer interact with each other. It is not actually used in the industry.
    • The TCP/IP model is a more practical, less generalised, conceptual model that describes data transmission over Internet in terms of four layers: Application, Transport, Internet, and Network Access.

    Protocols Examples

    • TCP/IP: used for communication over the Internet.
    • UDP: used to send data faster but not securely
    • HTTP, HTTPS, FTP, Telnet, SSH, SMTP, SNMP are application-level protocols.
    • ARP and RARP are used in the network layer to convert between IP and physical addresses.
    • ICMP, IGMP provide error messages and support for multicasting, respectively.

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    Related Documents

    Data Communication PDF

    Description

    Test your knowledge on various computer networking topologies including ring, tree, hybrid, and multipoint connections. This quiz covers the advantages and disadvantages of different network structures, as well as important characteristics and protocols within the TCP/IP model. Enhance your understanding of networking concepts and performance metrics.

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