Computer Networks Basics
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Questions and Answers

Which of the following is NOT a benefit of using a computer network?

  • Increased reliance on individual devices. (correct)
  • Enhanced communication between departments.
  • Greater collaboration among geographically dispersed teams.
  • Improved data sharing between employees.

    • A Local Area Network (LAN) is typically characterized by which of the following?

  • Public ownership of the network infrastructure.
  • Connection of devices within a confined area. (correct)
  • High bandwidth transmission capacity.
  • A wide geographical coverage area.

    • What is the primary difference between an Intranet and an Extranet?

  • An Intranet uses internet technologies, while an Extranet relies on private network protocols.
  • An Intranet is a private network, while an Extranet is a public network accessible to anyone.
  • An Intranet is accessible only to employees, while an Extranet can be accessed by external partners. (correct)
  • An Intranet is used for internal communication only, while an Extranet is used for external communication only.

    • Which of the following best describes the term "bandwidth" in a network context?

    <p>The speed at which data can be transmitted across the network. (B)</p> Signup and view all the answers

    What component is essential for a device to physically connect to a Local Area Network (LAN)?

    <p>Network Interface Card (NIC) (C)</p> Signup and view all the answers

    Which of the following is considered a communication channel in a computer network?

    <p>A physical cable connecting two computers. (D)</p> Signup and view all the answers

    What is the main difference between a narrowband and a broadband connection?

    <p>Narrowband connections have a lower transmission capacity than broadband connections. (C)</p> Signup and view all the answers

    Which of the following is an example of a WAN?

    <p>The internet, connecting millions of networks worldwide. (A)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of twisted pair wire?

    <p>It has great broadband capabilities for high-speed data transmission. (A)</p> Signup and view all the answers

    Which type of cable utilizes glass fibers to transmit data at the fastest speeds?

    <p>Fiber Optics (B)</p> Signup and view all the answers

    What is the primary function of a network protocol?

    <p>To establish rules and procedures for data transmission over a network. (D)</p> Signup and view all the answers

    Which protocol is the foundation of the internet, responsible for transmitting data packets?

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

    What is the main difference between a cable and a wireless communication channel?

    <p>Cables rely on physical wires, while wireless channels do not. (B)</p> Signup and view all the answers

    Which of the following BEST describes the concept of "Ubiquitous Computing" in the context of the Internet of Things (IoT)?

    <p>The constant presence of interconnected devices and data over the internet. (A)</p> Signup and view all the answers

    Which of these is NOT a potential issue related to the Internet of Things (IoT)?

    <p>Increased reliance on technology for basic tasks. (A)</p> Signup and view all the answers

    What is the primary security concern associated with IoT devices?

    <p>The potential exploitation of vulnerabilities in interconnected devices. (B)</p> Signup and view all the answers

    What is the purpose of the domain name in a URL?

    <p>It translates the website's address into a numerical IP address. (B)</p> Signup and view all the answers

    What is the role of the web server in processing a web page request?

    <p>It stores the web page files and sends them to the browser. (A)</p> Signup and view all the answers

    How does a web browser communicate with a web server?

    <p>By sending a series of text-based requests and responses. (C)</p> Signup and view all the answers

    Why is it important for the web browser to translate the domain name into an IP address?

    <p>To allow the computer to understand the location of the web server. (A)</p> Signup and view all the answers

    Which of the following is a characteristic of a public cloud?

    <p>It offers shared computing resources available to anyone over the internet. (A)</p> Signup and view all the answers

    What is the primary benefit of using a public cloud for accessing applications?

    <p>Lower costs compared to owning and managing private servers. (D)</p> Signup and view all the answers

    How does the use of a server farm enhance the accessibility and reliability of an application?

    <p>By geographically distributing servers across multiple locations for fault tolerance. (A)</p> Signup and view all the answers

    What is the role of the Uniform Resource Locator (URL) in accessing a web page?

    <p>It acts as a unique address for the web page on the web server. (B)</p> Signup and view all the answers

    Flashcards

    Network

    A system that connects data and information across devices and locations.

    Computer Network

    A system that connects computers and devices for data transmission via communication media.

    Local Area Network (LAN)

    Connects devices in a limited geographical area, typically within a building.

    Wide Area Network (WAN)

    A network that spans a large geographical area, connecting multiple LANs.

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    Internet

    A global network that connects millions of computer networks worldwide.

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    Intranet

    An internal network using internet technology within an organization.

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    Extranet

    Connects business partners' intranets for data sharing.

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    Bandwidth

    The maximum rate of data transfer across a network, measured in bits per second.

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    Server

    A large multi-user computer that stores applications and data.

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    Server Farm

    A collection of servers housed in a facility to handle large traffic demands.

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    Request (Web Browsing)

    The action of telling a browser which web page to visit using a URL.

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    IP Address

    A unique address that identifies a device on the internet.

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    Web Server

    A server that hosts web pages and responds to browser requests.

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    Public Cloud

    A shared, accessible IT infrastructure available for general public use.

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    How Browsers Decode

    Browsers interpret web page files to display text and resources.

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    Data Centre

    A facility used to house servers and data management resources.

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    Twisted Pair Wire

    A cheap type of cable made of copper wire, easy to break.

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    Coaxial Cable

    A copper cable that provides high-speed broadband capabilities.

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    Fiber Optics

    An expensive glass medium for very fast data transmission.

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    Network Protocol

    A set of rules for data transmission over networks.

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    Ethernet

    Common protocol used in local area networks (LAN).

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    Internet of Things (IoT)

    A system of interconnected devices sharing data without human interaction.

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    Ubiquitous Computing

    Continuous connection to the internet using various devices from anywhere.

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    IoT Security Issues

    Vulnerabilities in IoT arise from interconnected devices and outdated software.

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    Study Notes

    Network Basics

    • A network connects data and information through a network.
    • Enables organizations to adapt to changing business conditions.
    • Enables sharing of hardware, applications, and data across organizations.
    • Enables geographically dispersed employees to work together.
    • Networks are critical links between organizations, partners, and customers.
    • Remote work is facilitated by networks.

    Computer Networks

    • A computer network connects computers and devices (e.g., printers, screens).
    • Data and information are transmitted between devices.
    • Common network types include Local Area Networks (LANs) and Wide Area Networks (WANs).

    Local Area Networks (LANs)

    • Connects devices within a limited area (e.g., a building).
    • Ownership of the network is private.
    • Every device has a network interface card (NIC) for physical connection.

    Wide Area Networks (WANs)

    • Covers large geographical areas (e.g., multiple buildings or cities).
    • Often connect multiple LANs.
    • Typically provided by telecommunication companies (e.g., Virgin).
    • Examples include the internet.
    • Ownership can be private or public.

    Key Terms

    • Internet: Global network connecting numerous computer networks and devices.
    • Intranet: Internal use of internet technology within an organization.
    • Extranet: Connects organizational intranets for business partnerships.
    • Bandwidth: Data transmission capacity of a network, measured in bits per second. Ranges from narrowband to broadband. Broadband connections are "fast" connections.

    Communication Media & Channels

    • Communication channels deliver data between devices.
    • Two types:
      • Cables (physical wires)
      • Wireless (no physical wires)

    Different Types of Cables

    • Twisted pair wire: Inexpensive, but easy to break.
    • Coaxial cable: Higher bandwidth, faster data transfer.
    • Fiber optics: Expensive, fastest, but breakable.

    Network Protocols

    • Protocols are rules for data transmission.
    • Examples include:
      • Ethernet: Common protocol for LANs.
      • TCP/IP: Internet protocol, responsible for sending data over the internet.

    Wireless Technologies

    • Technologies enabling data transfer without cables.

    Internet of Things (IoT)

    • Objects/things that share data without human interaction.
    • Examples include: cars, smartwatches.
    • Systems of interconnected devices capable of transferring data wirelessly.

    Security

    • Hacking into IoT devices is possible because of their interconnected nature.
    • Frequent updates are necessary to secure vulnerable devices.

    Privacy Concerns

    • Data collection by IoT device manufacturers is a privacy concern.
    • Data about users is often used for profit.

    Challenges with IoT

    • Reliability and stability of IoT sensors.
    • Maintenance of the IoT.

    Cloud Computing

    • IT components including hardware, software, networks, databases, and other IT services.
    • Cloud computing allows shared resources and pay-as-you-go access for multiple customers.
    • Examples of cloud computing include Amazon, Microsoft Azure, Google Cloud, and IBM.
    • Server farms and data centers host cloud-based services.

    Cloud Computing Characteristics

    • Provides on-demand self-service.
    • Enables efficient resource utilization (saves money).
    • Provides fault tolerance (multiple computers will not stop application when one fails).
    • Allows for easy scaling up (add more servers to handle processing demands).
    • Allows for easy scaling down (remove servers if needed).

    Different Types of Clouds

    • Public clouds: Shared resources accessible to anyone.
    • Private clouds: Internal or corporate, only for a specific organization.
    • Hybrid clouds: Combines public and private clouds.

    Cloud Computing Services

    • Infrastructure-as-a-Service (IaaS): Rent servers, networks, and storage.
    • Platform-as-a-Service (PaaS): Rent servers, networks, storage, and other software (e.g. Java, operating systems).
    • Software-as-a-Service (SaaS): Rent software applications.

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    Related Documents

    Lecture 3 (Wireless & Cloud Computing) Lecture Notes PDF

    Description

    Explore the fundamentals of computer networks, including Local Area Networks (LANs) and Wide Area Networks (WANs). Understand how networks enable data sharing, enhance collaboration, and support remote work. This quiz covers crucial concepts that lay the groundwork for network understanding.

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