Introduction to Computer Networks
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Questions and Answers

What is the primary purpose of a computer network?

  • To increase the processing power of individual computers
  • To share resources and devices (correct)
  • To reduce the cost of hardware
  • To provide internet access

    • What is a key advantage of computer networks in terms of data transfer?

  • Faster data transfer speeds
  • Increased security risks
  • No wasting time in transferring data (real-time) (correct)
  • Reduced data storage capacity

    • What is a computer network comprised of?

  • Devices, network media, protocols, and network applications (correct)
  • Only servers and routers
  • Only computers connected via the internet
  • Only laptops and desktops

    • What is a benefit of sharing peripheral devices in a computer network?

    <p>Reduced cost by using minimum devices and resources</p> Signup and view all the answers

    What is a characteristic of computers in a computer network?

    <p>They can be geographically located anywhere</p> Signup and view all the answers

    What is a network criterion?

    <p>A characteristic required for network establishment</p> Signup and view all the answers

    What is a use of programs in a computer network?

    <p>To communicate with other users</p> Signup and view all the answers

    What is a network component?

    <p>All of the above</p> Signup and view all the answers

    What is the primary function of a receiver in a data communication system?

    <p>To receive data messages</p> Signup and view all the answers

    What is the primary purpose of a protocol in a data communication system?

    <p>To govern data communication</p> Signup and view all the answers

    What is transit time in the context of network performance?

    <p>The amount of time required for a message to travel from one device to another</p> Signup and view all the answers

    What is the term for the physical path by which a message travels from sender to receiver?

    <p>Transmission medium</p> Signup and view all the answers

    What can affect the speed and capacity of transmission in a network?

    <p>All of the above</p> Signup and view all the answers

    What can be affected by a large number of concurrent users in a network?

    <p>Response time</p> Signup and view all the answers

    What is an example of a transmission medium?

    <p>Coaxial cable</p> Signup and view all the answers

    What is the term for the time between inquiry and response?

    <p>Response time</p> Signup and view all the answers

    What is the primary benefit of having redundancy in data transmission?

    <p>No loss of data</p> Signup and view all the answers

    What is the term for the exchange of data between two devices via a transmission medium?

    <p>Data communication</p> Signup and view all the answers

    Which of the following is NOT a fundamental characteristic of a data communication system?

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

    What is the purpose of the sender in a data communication system?

    <p>To send data messages</p> Signup and view all the answers

    What type of data is most affected by timely delivery?

    <p>Video data</p> Signup and view all the answers

    What is the term for the information to be communicated in a data communication system?

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

    How many components make up a data communication system?

    <p>5</p> Signup and view all the answers

    What is the primary function of a protocol in a data communication system?

    <p>To control data transmission</p> Signup and view all the answers

    What is the primary function of network devices?

    <p>To connect computers and devices together</p> Signup and view all the answers

    What is the central computer referred to in a client/server model?

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

    What is an example of a network device?

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

    What is the purpose of a server in a client/server model?

    <p>To respond to client requests</p> Signup and view all the answers

    What type of network arrangement is characterized by a central server?

    <p>Client/Server</p> Signup and view all the answers

    What is the primary function of a client in a client/server model?

    <p>To request services from the server</p> Signup and view all the answers

    What type of device connects computers and devices together?

    <p>Network device</p> Signup and view all the answers

    What is the term for the devices that connect computers and devices together?

    <p>Interconnecting devices</p> Signup and view all the answers

    What is the primary function of a server in a computer network?

    <p>To control access to hardware, software, and other resources</p> Signup and view all the answers

    What is the key characteristic of a peer-to-peer network?

    <p>Each computer has equal responsibilities and capabilities</p> Signup and view all the answers

    What is the primary function of networking media?

    <p>To enable communication between computers through signal transmission</p> Signup and view all the answers

    What is the purpose of a protocol in a computer network?

    <p>To set rules for efficient communication between computers</p> Signup and view all the answers

    What is an example of a network application?

    <p>E-mail</p> Signup and view all the answers

    What is the name of the most widely used protocol suite in computer networks?

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

    What is a characteristic of a client in a client-server model?

    <p>It relies on a server for its resources</p> Signup and view all the answers

    What is the term for the means by which signals are sent from one computer to another?

    <p>Networking media</p> Signup and view all the answers

    Study Notes

    Introduction to Computer Networks

    Definition of Computer Network

    • A group of computers and devices connected together via communication devices and transmission media to share resources.
    • Computers can be geographically located anywhere.

    Advantages of Networks

    • Sharing information between devices
    • Transfer data from one computer to another
    • Share peripheral devices such as printers
    • Share storage devices to store data for backup
    • Use programs to communicate with other users
    • Access the Internet
    • No wasting time in transferring data (real-time)
    • Decreasing cost by using minimum devices and resources
    • More guarantee and security exist when information is sent from source to destination
    • No loss of data by putting redundancy backup

    Data Communication

    • Exchange of data (in the form of 0s and 1s) between two devices via some form of transmission medium (wire or wireless)
    • Communicating devices must be part of a communication system
    • Effectiveness of a data communication system depends on three fundamental characteristics:
      • Delivery: system must deliver data to the correct destination
      • Accuracy: system must deliver data accurately
      • Timeliness: system must deliver data in a timely manner

    Data Communication Components

    • Message: information (data) to be communicated
    • Sender: device that sends the data message
    • Receiver: device that receives the data message
    • Medium: transmission medium is the physical path by which a message travels from sender to receiver
    • Protocol: set of rules that govern data communication

    Network Criteria's

    • Performance: measured by transit time and response time
    • Number of users: having a large number of concurrent users can slow response time
    • Type of transmission medium: defines the speed at which data can travel through a connection
    • Hardware: types of hardware included in a network affect both the speed and capacity of transmission
    • Software: software used to process data at the sender, receiver, and intermediate nodes also affects network performance

    Network Components

    • Devices (Interconnecting Devices, End-user devices)
    • Physical Media (Wire or Wireless)
    • Networking Protocol
    • Applications (Services)

    Networking Devices

    • Network devices are electronic devices that connect computers and various other electronic devices together
    • Common devices: HUB, Switches, Routers, Wireless Access Points, Modems etc.

    End-User Devices (Computers)

    • Clients and Servers
    • Client/Server Model: a network structure in which individual computers and devices interact with each other through a central server
    • Clients: computers and mobile devices on the network that rely on the server for its resources
    • Server: controls access to the hardware, software, and other resources on the network and provides a centralized storage area for programs, data, and information

    PEER-TO-PEER

    • Each computer, called a peer, has equal responsibilities and capabilities, sharing hardware, data and information with other computers

    Networking Media

    • Defined as the means by which signals (data) are sent from one computer to another (either by cable or wireless means)

    Networking Protocol: TCP/IP

    • Protocol: a set of rules that make communication more efficient
    • TCP/IP is the most widely used protocol suite

    Network Applications (Services)

    • E-mail
    • Searchable Data (Web Sites)
    • E-Commerce
    • Internet Telephony (VoIP)
    • Video Conferencing
    • Chat Groups
    • Instant Messengers
    • Marketing and sales (booking hotel)
    • Financial services (Auto Teller Machine (ATM))
    • Manufacturing (multi-user work on project simultaneously)

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    Description

    This quiz covers the basics of computer networks, including the definition of computer networks and data communication, why networking is important, and the criteria and components of networks.

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