Computer Networks CS313 - Chapter 1 Quiz

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Questions and Answers

What is the primary function of a Network Operating System (NOS)?

  • To manage hardware resources without user input.
  • To process only single requests at a time.
  • To operate systems independently of network devices.
  • To facilitate and manage network connections among devices. (correct)

Which of the following best describes how text is represented in digital format?

  • Using bit patterns defined by Unicode. (correct)
  • As a series of images.
  • In binary form only.
  • As audio recordings.

How are audio signals typically described in digital format?

  • As bit patterns resembling images.
  • As series of numbers in hexadecimal.
  • As recordings or broadcasts of sound. (correct)
  • As text encoded using Unicode.

What defines a node in a network?

<p>Any device that connects to the network, including hosts and networking devices. (D)</p> Signup and view all the answers

What is a communication link in a network primarily used for?

<p>To transfer data between devices. (C)</p> Signup and view all the answers

What type of connection involves a dedicated link between only two devices?

<p>Point-to-Point connection (C)</p> Signup and view all the answers

Which topology has a central controller to which all other devices connect?

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

What is a key disadvantage of a star topology?

<p>Single point of failure (C)</p> Signup and view all the answers

Which topology involves a single main cable with multiple droplines attached?

<p>Bus topology (D)</p> Signup and view all the answers

What advantage is associated with a ring topology?

<p>Low cabling requirement (A)</p> Signup and view all the answers

In a multipoint connection, how is the link utilized?

<p>Shared between multiple devices (D)</p> Signup and view all the answers

What is a disadvantage of bus topology?

<p>Difficulty in adding new devices (B)</p> Signup and view all the answers

Which type of connection allows for direct transmission between all interconnected nodes?

<p>Ring connection (D)</p> Signup and view all the answers

What defines the size of a Metropolitan Area Network (MAN)?

<p>Between 5 to 50 km in diameter. (A)</p> Signup and view all the answers

Which of the following technologies is associated with Local Area Networks?

<p>Token ring. (B)</p> Signup and view all the answers

What is one of the main characteristics of a Wide Area Network (WAN)?

<p>Data travels through telephone or cable lines. (D)</p> Signup and view all the answers

Which option is NOT a typical characteristic of a Local Area Network?

<p>Low data transfer speeds. (B)</p> Signup and view all the answers

How is a Metropolitan Area Network typically managed?

<p>By a single entity such as an ISP. (A)</p> Signup and view all the answers

What is the primary function of a modem in a Wide Area Network?

<p>To modulate and demodulate signals. (C)</p> Signup and view all the answers

Which statement is true about the Internet as a WAN?

<p>It is the world's largest WAN. (B)</p> Signup and view all the answers

What constitutes a computer network?

<p>A group of computers/devices using common protocols. (C)</p> Signup and view all the answers

Which of the following correctly identifies network elements?

<p>Nodes, Medium, Protocol, Operating System, Software. (C)</p> Signup and view all the answers

What role does network software (SW) play in a computer network?

<p>It helps in issuing requests and responses between clients and servers. (D)</p> Signup and view all the answers

Which statement accurately describes a communication protocol?

<p>It is a set of rules for exchanging information over a network. (D)</p> Signup and view all the answers

What types of technologies can be used to form interconnections between nodes?

<p>A combination of wired, optical, and wireless technologies. (D)</p> Signup and view all the answers

In the context of network elements, which of the following describes 'nodes'?

<p>Any devices that are part of the network’s architecture. (B)</p> Signup and view all the answers

Which of the following best defines data communications?

<p>The exchange of information between two devices through a transmission medium. (D)</p> Signup and view all the answers

What function does the operating system (OS) serve in a networked environment?

<p>It manages communications between software and hardware. (B)</p> Signup and view all the answers

Flashcards

Network Link

A connection between two or more devices in a network; can be wired or wireless.

Point-to-Point Connection

A network connection where a dedicated link is established between two devices only.

Multipoint Connection

A network connection where a shared link is used by more than two devices.

Network Topology

The physical layout or arrangement of devices and connections in a network.

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Star Topology

A network topology where devices connect to a central controller.

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Bus Topology

A network topology where devices share a single cable.

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Ring Topology

A network topology where devices form a closed loop.

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Mesh Topology

A network topology where every device has a dedicated link to every other device.

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Data Communications

The exchange of information between two devices through a transmission medium.

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Computer Network

A group of computers/devices (nodes) that use common communication protocols over digital interconnections to share resources.

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Network Node

A computer or device participating in a network.

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Network Medium

The physical connections between network nodes (wired, wireless, optical).

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Network Protocol

A set of rules for exchanging information over a network.

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Network Software

Software used for network operations, allowing devices to act as clients or servers.

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Network Elements

Components of a network, including nodes, medium, protocols, operating systems, and software.

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Operating System (OS)

The software that manages computer resources involved in networking.

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Network Operating System

An operating system specifically designed to manage network resources and connect devices in a local area network (LAN).

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Network

A group of connected devices (nodes) using communication links to transfer data.

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Node

A device in a network, including computers, printers, or networking devices.

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Link

A communication pathway transferring data between devices in a network.

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Data Types (Networks)

Information on a network comes in multiple formats like text, numbers, images, sound, and video. Each encoded differently.

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Local Area Network

A network covering a small area (home, school, etc.), usually managed by one entity.

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Metropolitan Area Network

Larger than a LAN but smaller than a WAN, typically covering a city or town.

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Wide Area Network

A large-scale network covering a vast geographic region, often using various connections.

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Hybrid Topology

A network combining different topologies, like a star backbone with bus networks.

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Data Speed (LAN)

The rate at which data is transferred within a Local Area Network, reaching up to 10 Gbps.

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Network Bandwidth

The amount of data that can be transmitted over a network in a given time.

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High Throughput

The rate at which successful messages are delivered over a network.

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Internet

The largest Wide Area Network (WAN) in the world, connecting millions of users and computers.

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Study Notes

Computer Networks (CS313)

  • Course is CS313, Computer Networks taught by Dr. Heba Sabry

  • Text is from McGraw-Hill

  • Introduction chapter (Chapter 1)

  • Data communication is the exchange of information between two devices via a transmission medium.

  • A computer network is a group of interconnected computers (nodes) using common communication protocols to share resources.

  • Components of a network:

    • Nodes: Computers, printers, cell phones, routers, switches, modems
    • Medium: Interconnections, physically wired, optical, wireless
    • Protocol: Set of rules for exchanging information
    • Operating System (OS): Manages network resources, handles concurrent requests, and provides security.
    • Software (SW): Tools used for communication (e.g., issuing requests, remote access, etc.)

  • Network connections:

    • Point-to-point: Dedicated link; between two devices.
    • Multipoint: Shared link; between more than two devices.

  • Data flow types (simplex, half-duplex, full-duplex) described in a diagram.

  • Network topologies:

    • Mesh: Dedicated link to every node, advantages are robustness and fault detection, disadvantages are high cost for implementation.
    • Star: All nodes connect to a central controller, less expensive than mesh, easy to manage and troubleshoot.
    • Bus: Nodes share a single cable, easy to install but difficult to isolate faults, less expensive than mesh and star
    • Ring: Nodes connect in a ring, easy to install, fault isolation is simple, robust for few nodes, not robust overall.
    • Hybrid: Combination of different topologies.

  • Categories of networks:

    • Local Area Network (LAN):

      • Spans a small area (e.g., home, school, office).
      • Administered by a single entity.
      • High speed bandwidth, High throughput.
      • Technologies include FDDI, token ring.

    • Metropolitan Area Network (MAN):

      • Larger than LAN, but smaller or equal to WAN.
      • Typically owned and managed by a single entity.

    • Wide Area Network (WAN):

      • Extends over a large geographical area.
      • Uses telephone or cable lines.
      • Often requires a modem.
      • The internet is the largest WAN.

  • Concepts of message types:

    • Text, numbers, images, audio, and video

  • Data representation examples (e.g., text using Unicode, numbers using binary, images as bit patterns)

  • Diagrams exist for examples of networks, LANs, MANs, and WANs.

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