Data Communication and Networking Quiz

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Questions and Answers

What is the primary function of a computer network?

  • To manage all software updates for computers
  • To increase the storage capacity of individual computers
  • To provide high-speed internet access to all users
  • To connect computers using a single transmission technology (correct)

Which topology involves each computer being connected to a central hub?

  • Satellite topology
  • Star topology (correct)
  • Tree topology
  • Ring topology

Which of the following best describes the Internet?

  • A single network that connects all computers globally
  • A type of Local Area Network for educational institutions
  • A set of networks connected by routers that facilitates communication (correct)
  • A proprietary network managed by a single organization

What is the main characteristic distinguishing a Local Area Network (LAN) from a Wide Area Network (WAN)?

<p>The physical size of the area covered by the network (D)</p> Signup and view all the answers

What is a key feature of ring topology?

<p>Each computer is connected to two other computers, forming a circular network. (A)</p> Signup and view all the answers

Which factor does NOT classify computer networks according to the provided information?

<p>By purpose (D)</p> Signup and view all the answers

Which of the following is not a type of medium used for network transmission?

<p>Bluetooth technology (D)</p> Signup and view all the answers

In the context of network classification by size, what does WAN stand for?

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

What characteristic distinguishes mobile networks from fixed networks?

<p>Mobile networks are a recent development emerging in the 90s. (C)</p> Signup and view all the answers

Which medium is described as having a longer range compared to optical fiber?

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

How do LAN and WAN compare in terms of management?

<p>LANs are easier to manage than WANs due to their smaller size (B)</p> Signup and view all the answers

What defines the Internet's capacity to connect computers at long distances?

<p>Routers that are configured to pass traffic among networks (D)</p> Signup and view all the answers

What are the two main categories of broadcast topology?

<p>Satellite/radio and ring (C)</p> Signup and view all the answers

Which of the following statements about network latency is true?

<p>Latency refers to the time taken for data to travel from source to destination. (B)</p> Signup and view all the answers

Which parameter is NOT used to differentiate mediums of transmission?

<p>Cost of computer (B)</p> Signup and view all the answers

In which topology does communication take place through a central hub?

<p>Tree topology (C)</p> Signup and view all the answers

Which of the following issues is associated with mobility in networks?

<p>Semi persistent connections (D)</p> Signup and view all the answers

What is one major application of networks in business?

<p>Shipping and planning (C)</p> Signup and view all the answers

Which statement best describes the complexity of networking technologies?

<p>Many different technologies exist with incompatible features. (B)</p> Signup and view all the answers

What is a significant factor contributing to the complexity of networks?

<p>Absence of a single underlying theory or model (C)</p> Signup and view all the answers

How are networks utilized at the government level?

<p>For communication purposes (B)</p> Signup and view all the answers

Which of these is NOT a major area where networks are applied?

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

What challenge does complex administration present in mobile networks?

<p>Tracking users and devices (B)</p> Signup and view all the answers

Why is there no single underlying model for networking?

<p>Various organizations have developed their own conceptual models. (C)</p> Signup and view all the answers

Flashcards

Computer Network

A system connecting computers using a single transmission technology, allowing them to communicate and share data.

Internet

A collection of interconnected networks, using routers to facilitate communication among all connected computers.

Local Area Network (LAN)

A network spanning a small geographic area (e.g., a room, building).

Wide Area Network (WAN)

Network covering a large geographic area (e.g., city, country).

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Network Classification

Categorizing networks based on size, connectivity, transmission medium, and mobility.

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Network Size

Classifying networks based on their geographical reach, such as LAN and WAN.

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Network Comparison

Evaluating LAN vs WAN based on speed, bandwidth, latency, management, security, reliability, billing, and standards.

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Network Factors

The 4 factors to consider when classifying a network. Size, connectivity, medium and mobility.

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Point-to-point topology

A network topology where data travels directly between two points.

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Star topology

A point-to-point topology where all devices connect to a central hub.

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Tree topology

A point-to-point topology where data travels through a hierarchical structure.

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Broadcast topology

A network topology where data is sent to all devices on the network.

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Satellite/Radio topology

A broadcast topology where data travels via satellite or radio waves.

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Ring topology

A broadcast topology where data travels in a closed loop.

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Network transmission mediums

Various physical means for transmitting data in a network.

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Network mobility

A classification of networks based on whether they are fixed or mobile.

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Network Mobility Issues

Challenges in managing networks when devices and users move around.

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Network Complexity

Computer networks are difficult because of various technologies and lack of a single theory.

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Network Technologies

Differing networking standards, not all compatible, from varied companies.

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Network Administration/Billing

Managing and charging for network use becomes harder when users move around.

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Business Network Uses

Networks are widely used for business tasks like advertising, production, planning and more.

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Home Network Uses

Networks control various home devices from a central point.

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Government Network Uses

Governments use networks for communication at various levels like Federal, Local and Military.

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Education Network Uses

Networks provide online libraries and learning resources accessible from home computers.

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Study Notes

Course Objective

  • To provide a fundamental understanding of data communication and networks
  • To explain how computer networks and the internet operate

Reference Material

  • Data Communication and Networking by Behrouz A. Forouzan, McGraw-Hill Science, 5th edition
  • Computer Networks and Internets by Douglas E. Comer, 5th edition
  • Data and Computer Communication by William Stallings, 10th edition
  • Computer Networks by Andrew S. Tanenbaum, David J. Wetherall, 5th edition
  • Computer Networking: A Top-Down Approach Featuring the Internet, 6th edition by James F. Kurose and Keith W. Ross

Network Introduction

  • A network is a system that connects computers using a single transmission technology
  • Computers in a network can communicate with each other, sending and receiving data

Internet Introduction

  • The internet is a collection of interconnected networks
  • Routers connect these networks, allowing traffic to pass between any computer on the internet
  • Computers at various distances can communicate with one another

Network Classification

  • Networks are classified by factors such as size, connectivity, medium, and mobility

Network Classification- By Size

  • LAN (Local Area Network): covers smaller areas like rooms, floors, or buildings
  • WAN (Wide Area Network): covers larger areas like cities and countries
  • Internet is a WAN
  • LAN and WAN are differentiated based on speed, bandwidth and latency, management, security, reliability, billing standards

Network Classification- By Connectivity

  • Point-to-Point:
    • Star topology: each computer connects to a central hub
    • Tree topology: communication occurs through a hub
  • Broadcast:
    • Satellite/radio topology: computers connect through satellite or radio waves
    • Ring topology: each computer connects to another in a ring structure

Network Classification- By Medium

  • Transmission mediums include copper wire, coaxial cable, optical fiber, and radio waves
  • These mediums differ in speed, range, sharing of information, topology, installation costs, and reliability

Network Classification- By Mobility

  • Fixed networks: do not change location
  • Mobile networks: move around
  • Mobile networks introduce location and tracking issues, semi-persistent connections, and complex administrative and billing processes

Networks in Daily Life

  • Networks are crucial for business activities such as advertising, production, shipping, planning, billing, and accounting
  • Networks are used in homes for controlling and connecting devices
  • Governments and military organizations heavily rely on networks for communication
  • Networks enable access to online resources like libraries on personal computers

Complexity of Network Systems

  • Many different technologies exist, often incompatible due to varied standards
  • No single underlying theory or model exists to encompass all networking aspects
  • Models can be overly simplistic or complex, not accurately representing the complexity of networks
  • No simple and uniform terminology across various technologies; terms are sometimes confused with product names

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