OCR Computer Science AS Level 1.3.3 Networks Intermediate Quiz
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Questions and Answers

What is the main purpose of network protocols and standards?

  • To increase the speed of data transmission
  • To make networks more secure
  • To reduce the cost of building a network
  • To ensure different devices can communicate with each other (correct)

    • Which type of network is typically spread over a large geographical area?

  • Mesh topology
  • Wide Area Network (WAN) (correct)
  • Bus topology
  • Local Area Network (LAN)

    • In a client-server network, which device typically initiates the request for data or services?

  • The server
  • Neither the client nor the server
  • The client (correct)
  • Both the client and server

    • Which layer of the TCP/IP stack is responsible for ensuring reliable data transfer?

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

    In a peer-to-peer network, which of the following is true?

    <p>Each device acts as both a client and a server</p> Signup and view all the answers

    Which network topology shows the physical layout of the wires and components that make up the network?

    <p>Physical topology</p> Signup and view all the answers

    What is the primary purpose of the Transport Layer in the TCP/IP stack?

    <p>To establish end-to-end connection between the source and destination computers</p> Signup and view all the answers

    Which of the following is the key difference between a LAN and a WAN?

    <p>LANs are spread over a small geographical area, while WANs are spread over a large geographical area</p> Signup and view all the answers

    What is the primary role of the Network Layer in the TCP/IP stack?

    <p>To add the source and destination IP addresses</p> Signup and view all the answers

    Which of the following statements about the Application Layer in the TCP/IP stack is correct?

    <p>The Application Layer specifies the protocol that needs to be used for the application</p> Signup and view all the answers

    Which of the following is a key advantage of using standardized protocols like TCP/IP?

    <p>It allows devices from different manufacturers to communicate with each other</p> Signup and view all the answers

    Which of the following is a key characteristic of a client-server network architecture?

    <p>One or more devices act as servers, providing resources to client devices</p> Signup and view all the answers

    Which of the following is a disadvantage of the star topology?

    <p>If the central switch fails, the rest of the network fails.</p> Signup and view all the answers

    What is an advantage of the mesh topology?

    <p>Nodes are automatically incorporated into the network.</p> Signup and view all the answers

    Which of the following is a protocol used for email access?

    <p>POP3 or IMAP</p> Signup and view all the answers

    What is the primary purpose of protocols in computer networks?

    <p>To define the rules for communication between devices.</p> Signup and view all the answers

    Which of the following best describes a client-server network?

    <p>A network where some nodes act as servers, providing resources to client nodes.</p> Signup and view all the answers

    What is the difference between a LAN and a WAN?

    <p>A LAN is a local area network, while a WAN is a wide area network.</p> Signup and view all the answers

    Study Notes

    Network Topologies

    • Star Topology: expensive due to switch and cabling; if the central switch fails, the entire network fails
    • Mesh Topology: no cabling cost if wireless; reliability and speed improve with node increase; no central switch improves speed; but devices with wireless capability are expensive, and maintaining the network is difficult

    Protocols

    • A protocol is a set of rules defining how computers communicate with each other
    • Examples of commonly used protocols: HTTP, TCP/IP, POP3, IMAP, and FTP
    • Protocols are standard, allowing devices to communicate regardless of manufacturer

    The Internet Structure

    • The Internet is a network of networks allowing global communication
    • The Internet Structure includes: TCP/IP stack, protocol layering, LANs and WANs, and DNS

    Characteristics of a Network

    • A network is two or more computers connected together, transmitting data between each other
    • There are two main types of networks: Local Area Networks (LANs) and Wide Area Networks (WANs)
    • LANs cover a small geographical area or a single site, while WANs cover a large geographical area

    Network Types and Topology

    • Physical topology refers to the physical layout of wires and components
    • Logical topology refers to the layout showing how data flows
    • Examples of physical topology: bus, star, and mesh

    Bus Topology

    • All terminals are connected to a backbone cable, with ends plugged into a terminator
    • Continents are connected using large international backbone cables

    The TCP/IP Stack and Protocol Layering

    • TCP/IP is a stack of networking protocols working together, passing packets during communication
    • The TCP/IP stack consists of: Application Layer, Transport Layer, Network Layer, and Link Layer

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    Description

    Test your knowledge on Characteristics of a Network, Importance of Protocols and Standards, The internet Structure including TCP/IP stack, Protocol Layering, LANs and WANs, DNS, Packet and Circuit Switching, Client-server and Peer-to-peer concepts.

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