Computer Networks Chapter 1
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Questions and Answers

Which component of data communication is responsible for transmitting the message?

  • Protocol
  • Receiver
  • Sender (correct)
  • Transmission Medium

    • What defines a set of rules that governs data communication between devices?

  • Protocol (correct)
  • Transmission Medium
  • Message
  • Receiver

    • Which of the following is NOT a characteristic of data communication?

  • User Accessibility (correct)
  • Accuracy
  • Delivery
  • Protocol Compliance

    • Which type of network topology connects all devices in a circular path?

    <p>Ring Network Topology</p> Signup and view all the answers

    What type of network would you classify a network that covers a specific campus area?

    <p>Campus Area Network (CAN)</p> Signup and view all the answers

    Which of the following is a key feature distinguishing packet-switched networks from circuit-switched networks?

    <p>Dynamic routing of data</p> Signup and view all the answers

    What is the primary role of the transmission medium in data communication?

    <p>To physically carry the data</p> Signup and view all the answers

    What is the primary difference between packet switching and circuit switching?

    <p>Packet switching sends data in small chunks called packets.</p> Signup and view all the answers

    In datagram packet switching, how are packets treated as they pass through the network?

    <p>Each packet is treated independently with no dependency on previous packets.</p> Signup and view all the answers

    What is included in each packet to assist with its routing in virtual circuit packet switching?

    <p>A virtual circuit identifier (VCI).</p> Signup and view all the answers

    What does the receiver have to do when packets arrive out of order in a datagram packet switching network?

    <p>Re-order packets and fill in missing data.</p> Signup and view all the answers

    Which of the following statements correctly distinguishes virtual circuit packet switching from datagram packet switching?

    <p>Virtual circuit packet switching does not reserve resources for the connection.</p> Signup and view all the answers

    Which device is primarily used for internetworking between LAN and WAN?

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

    What type of intermediary network device can regenerate signals for network extension?

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

    In a BUS network topology, how are nodes connected?

    <p>To a single wire with two endpoints</p> Signup and view all the answers

    Which type of network topology is most commonly used due to its simplicity and ease of extension?

    <p>Tree Network Topology</p> Signup and view all the answers

    What is the main function of a firewall in a network?

    <p>To regulate network traffic and provide security</p> Signup and view all the answers

    Which of the following media uses glass or plastic fibers for data transmission?

    <p>Fiber optic cable</p> Signup and view all the answers

    What characteristic defines a hybrid network topology?

    <p>It includes multiple types of network configurations</p> Signup and view all the answers

    What is a significant disadvantage of a ring network topology?

    <p>Difficult to identify faults</p> Signup and view all the answers

    Which device is specifically intended for LAN implementation?

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

    What is the primary purpose of topology diagrams in network management?

    <p>To provide a visual map of network connections</p> Signup and view all the answers

    Which of the following best describes a Personal Area Network (PAN)?

    <p>A short-distance network typically designed for individual user devices</p> Signup and view all the answers

    What is the primary characteristic of a Metropolitan Area Network (MAN)?

    <p>Spans a physical area larger than a LAN but smaller than a WAN</p> Signup and view all the answers

    In which type of network topology diagram would you find information about devices and addressing schemes?

    <p>Logical topology diagrams</p> Signup and view all the answers

    What is a key characteristic of a Local Area Network (LAN)?

    <p>It is typically managed by an individual or IT department within a small area.</p> Signup and view all the answers

    Which statement accurately describes a Wide Area Network (WAN)?

    <p>Provides access to other networks over a large geographical area</p> Signup and view all the answers

    What type of network relies on a dedicated communications path for communication?

    <p>Circuit-switched network</p> Signup and view all the answers

    Which of the following networks is designed specifically for a collection of interconnected LANs within a limited geographical area?

    <p>Campus Area Network (CAN)</p> Signup and view all the answers

    Which of the following networks is primarily characterized by nodes operating independently without concern for the content of the data?

    <p>Switched communication network</p> Signup and view all the answers

    Which technology is commonly used to connect devices in a Personal Area Network (PAN)?

    <p>Bluetooth and USB cables</p> Signup and view all the answers

    What does a Physical topology diagram primarily represent?

    <p>The physical location of devices and cable layout</p> Signup and view all the answers

    Which feature distinguishes broadcast communication networks from switched communication networks?

    <p>Broadcast networks require media access control</p> Signup and view all the answers

    Which classification of networks serves a larger geographical area than a Local Area Network (LAN) but smaller than a Wide Area Network (WAN)?

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

    What is a key purpose of switching nodes in a switched communication network?

    <p>To facilitate the movement of data from node to node</p> Signup and view all the answers

    Which of the following is NOT a component typically found in a Personal Area Network (PAN)?

    <p>Wireless routers</p> Signup and view all the answers

    Which type of network would most likely be used for providing Internet access across a country?

    <p>Wide Area Network (WAN)</p> Signup and view all the answers

    How do nodes in broadcast networks receive information?

    <p>All nodes receive the information transmitted by any node</p> Signup and view all the answers

    What is the maximum typical distance covered by a Personal Area Network (PAN)?

    <p>10 meters</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a Local Area Network (LAN)?

    <p>Primarily managed by telecommunications service providers</p> Signup and view all the answers

    Study Notes

    Computer Networks - Chapter 1

    • Fundamentals of Computer Networks: This chapter introduces fundamental concepts of computer networks. It covers data communication components, transmission modes, network components (devices and media), network topologies, network classifications, and interconnected networks (the internet). It also explores converged networks.

    Introduction to Data Communications and Computer Networks

    • Data Communication: The exchange of data between two devices via a transmission medium. The core problem is reproducing a message at one point accurately or approximately from another point.

    • Components of Data Communication: The five core components are message, sender, receiver, transmission medium, and protocol.

    • Characteristics of Data Communication: Key factors include reliable delivery, accuracy of data, and timely delivery without delay (real-time).

    • Transmission Modes:

      • Simplex: One-way communication. One device is always a sender, the other a receiver. (e.g., remote control to a TV)
      • Half-Duplex: Two-way communication, but only one device can transmit at a time. (e.g., walkie-talkie)
      • Full-Duplex: Both devices can transmit and receive simultaneously; this is common in computer networks. (e.g., computer network)

    Network Components

    • End Devices: These are the source or destination of the message. Examples include computers, laptops, servers, printers, telephones, and mobile devices.

    • Intermediary Devices: These connect devices and networks. Examples include hubs, switches, routers, repeaters, bridges, and firewalls. They manage data flow between different networks

    • Network Media: The physical path for data transmission. Examples include metallic wires (copper cables), fiber optic cables, and wireless transmission (e.g., using radio waves).

    • Network Services: Processes that facilitate data sharing, internet browsing, telephony, conferencing, database management, backup, and more. These services enable users to efficiently utilize resources and communicate.

    Network Topologies

    • Mesh Topology: All nodes are connected to all other nodes.
    • Tree Topology: A hierarchy of connections, starting with a central point and branching out.
    • Bus Topology: A single cable connects all nodes, acting as a common pathway.
    • Star Topology: Devices are connected to a central hub or switch.
    • Ring Topology: Devices are connected in a closed loop.
    • Hybrid Topology: Uses a combination of different topologies to meet network needs.

    Network Classifications

    • PAN (Personal Area Network): A small network within a person's immediate area. (within 10 m)
    • LAN (Local Area Network): A small network within an office, home, or building (e.g., an office network).
    • CAN (Campus Area Network): Connects networks across a campus or group of nearby buildings.
    • MAN (Metropolitan Area Network): A larger network that covers a city or metropolitan area.
    • WAN (Wide Area Network): A large network that covers a wide geographic region, often spanning across countries and continents.

    Circuit Switched and Packet Switched Networks

    • Circuit Switching: Establishes a dedicated path for communication. Bandwidth is reserved throughout the connection. Suitable for real-time services. (e.g., phone calls). Inefficient for bursty data.
    • Packet Switching: Breaks data into packets, which can take various routes through the network. More efficient for intermittent or variable data transmission (e.g., the internet).

    Clients and Servers

    • Servers: Computers that provide resources or services to other devices on the network.
    • Clients: Computers that request and use resources provided by the server(s).

    Peer-to-Peer

    • Peer-to-Peer (P2P) Network: Computers can act as both clients and servers, sharing resources among themselves within a network.

    Interconnection of Networks: The Internet

    • Internet/Internetworks: Multiple interconnected networks. The global system of interconnected networks. Standardized protocols enable communication, like TCP/IP.

    Converged Networks

    • Converged Networks: Combining different communication services (data, voice, video) on a single network infrastructure.

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    Description

    This quiz covers fundamental concepts in computer networks, including data communication, components, transmission modes, and various network topologies. Explore the characteristics of data communication and the fundamentals of how networks operate and connect. It's an essential introduction for anyone studying the basics of networking.

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