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Which of the following is NOT a reason why a complex computer network might be difficult to set up?

  • The cost of implementing network security measures.
  • The complexity of managing multiple devices and connections.
  • The lack of readily available network engineers. (correct)
  • The need for specialized equipment and software.
  • Which of the following network types is specifically designed for internal use within an organization, restricting access to authorized users?

  • Intranet (correct)
  • Extranet
  • Wide Area Network (WAN)
  • Local Area Network (LAN)
  • Which of the following network motivations primarily revolves around accessing large databases efficiently, especially when data duplication is expensive?

  • Load Sharing
  • Data Sharing (correct)
  • Message Service
  • Program Sharing
  • Which of the following network motivations is NOT considered a primary motivation for a network of scientific computers?

    <p>Message Service (C)</p> Signup and view all the answers

    Which of the following scenarios BEST exemplifies the use of an Extranet?

    <p>A company's online portal for suppliers to access order information and track deliveries. (D)</p> Signup and view all the answers

    Which of these is NOT a potential security threat associated with a computer network?

    <p>Increased network latency due to high traffic. (A)</p> Signup and view all the answers

    Which of the following is the BEST description of the primary purpose of a Local Area Network (LAN)?

    <p>Connecting computers and devices within a geographically limited area. (D)</p> Signup and view all the answers

    Which network layout is characterized by all nodes being connected to a central node, making it vulnerable to disruption if that central node fails?

    <p>Star Network (B)</p> Signup and view all the answers

    What was the primary motivation behind the development of ARPANET, as described in the content presented?

    <p>To develop a network resistant to nuclear attacks. (D)</p> Signup and view all the answers

    What type of network architecture did ARPANET utilize, as described in the content?

    <p>A decentralized network without a single point of failure. (B)</p> Signup and view all the answers

    What was the primary communication protocol used by computers connected to ARPANET, as mentioned in the text?

    <p>National Control Protocol (NCP) (A)</p> Signup and view all the answers

    According to the content, what is the historical timeline of ARPANET's development and the introduction of email?

    <p>ARPANET was launched in 1969, and the first email was sent in 1972. (D)</p> Signup and view all the answers

    How did the development of Local Area Ethernet Networks (LANs) and workstations affect ARPANET's growth?

    <p>LANs and workstations provided a new connection point for ARPANET, increasing its reach and expansion. (C)</p> Signup and view all the answers

    Which network layout is characterized by each node being connected to its immediate neighbors on either side, forming a closed loop?

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

    Which of these network types is most resistant to the failure of a single node?

    <p>Mesh Network (C)</p> Signup and view all the answers

    What is the primary purpose of a protocol in a network, as mentioned in the text?

    <p>To provide a standard for communication and data exchange between devices. (D)</p> Signup and view all the answers

    Which of the following is NOT a valid value for the target attribute of an <a> element?

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

    How would you create a hyperlink to an email address that opens the user's default email client?

    <p><a href="mailto:[email protected]">Send Email</a> (D)</p> Signup and view all the answers

    Which of the following is an accurate description of an absolute hyperlink?

    <p>A link that contains the full address of the destination file or website. (D)</p> Signup and view all the answers

    Which rel attribute value would you use to indicate that a page is licensed under a specific license?

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

    What is the purpose of the download attribute in an <a> element?

    <p>To prompt the user to download a linked file. (A)</p> Signup and view all the answers

    Which protocol is specifically designed for transferring files between computers on the internet?

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

    What is the primary function of a Web Hosting service?

    <p>Storing and managing website content for users. (B)</p> Signup and view all the answers

    What is the main difference between HTTP and HTTPS?

    <p>HTTPS is a more secure version of HTTP, using encryption to protect data. (B)</p> Signup and view all the answers

    Which of the following best describes the role of a search engine in the Internet?

    <p>A tool for finding specific websites by indexing and organizing their content. (A)</p> Signup and view all the answers

    What distinguishes a 'client' computer from a 'server' computer in the client-server architecture of the internet?

    <p>A client requests resources from a server, while a server provides those resources. (D)</p> Signup and view all the answers

    Why is it important to understand that search engines don't search the entire internet?

    <p>Because search engines have limited resources and can only index a fraction of the internet's data. (B)</p> Signup and view all the answers

    How do TCP/IP protocols facilitate communication on the internet?

    <p>By establishing the rules for transmitting data between computers over networks. (A)</p> Signup and view all the answers

    What is the primary function of an Internet Service Provider (ISP)?

    <p>Providing internet access to individuals and organizations. (D)</p> Signup and view all the answers

    Which of the following best describes the concept of a 'web server'?

    <p>A specialized computer that stores and delivers website content to users. (C)</p> Signup and view all the answers

    In the context of the internet, what is the difference between a 'nonprofit organization' and a 'business'?

    <p>Nonprofits are focused on public service, while businesses aim for profit. (D)</p> Signup and view all the answers

    Which of the following is a valid HTML code to create an ordered list of three items?

    <p><code>&lt;ol&gt;&lt;li&gt;First item\ &lt;/li&gt;&lt;li&gt;Second item\&lt;/li&gt;&lt;li&gt;Third item&lt;/li&gt;&lt;/ol&gt;</code> (A)</p> Signup and view all the answers

    What is the purpose of the \<dd> tag in HTML?

    <p>To define the description of a term in a description list. (B)</p> Signup and view all the answers

    Which of the following is a correct statement about the relationship between HTML, CSS, and JavaScript?

    <p>HTML defines the structure of a web page, CSS defines the style or visual presentation, and JavaScript adds interactivity and functionality. (B)</p> Signup and view all the answers

    What is the main difference between an ordered list and an unordered list in HTML?

    <p>Ordered lists are used for creating lists with items in a specific sequence, while unordered lists are used for lists with items in no particular order. (C)</p> Signup and view all the answers

    Which of the following is a valid option for the \<li> tag in an ordered list?

    <p>All of the above. (D)</p> Signup and view all the answers

    In the context of HTML nested lists, which of the following is TRUE about the relationship between the \<ul> and \<ol> tags?

    <p>Both <code>\&lt;ul&gt;</code> and <code>\&lt;ol&gt;</code> tags can be nested within each other. (D)</p> Signup and view all the answers

    Which of the following statements about HTML description lists is TRUE?

    <p>They are used to create simple lists of terms and their corresponding definitions. (E)</p> Signup and view all the answers

    Consider this HTML code: \<dl>\<dt>Term 1\</dt>\<dd>Description 1\</dd>\<dt>Term 2\</dt>\<dd>Description 2\</dd>\</dl>. What would the output of this code look like?

    <p>Term 1 Description 1 Term 2 Description 2 (B)</p> Signup and view all the answers

    Flashcards

    Computer Virus

    A malicious program that replicates itself to infect devices.

    Denial of Service

    An attack that prevents access to a network or service.

    Load Sharing

    Distributing computing tasks across multiple systems to balance the load.

    Intranet

    A private network within an organization, only accessible to authorized users.

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    Extranet

    A controlled network that extends an intranet to authorized external users.

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    Local Area Network (LAN)

    A network connecting devices in a limited area like a home or office.

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    Data Sharing

    Transmitting files to a remote computer to access large databases.

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    Bus Network

    A network layout where all nodes connect to a common medium.

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    Star Network

    A network layout where all nodes connect to a central node.

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    Ring Network

    A network layout where each node connects to two neighbors, forming a ring.

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    Mesh Network

    A network where each node connects to multiple neighbors for redundancy.

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    Fully Connected Network

    A network where every node is directly connected to every other node.

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    ARPANET

    The precursor to the Internet developed by ARPA for secure communications.

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    NCP

    National Control Protocol, the standard communication protocol for ARPANET.

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    Protocol

    A set of rules that determine how data is transmitted over a network.

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    Hyperlink

    A clickable link that connects to a web resource.

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    Link Target Options

    Attributes to control where hyperlinks open: self, blank, parent, top.

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    Visited Link Appearance

    A visited link is typically purple and underlined.

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    Email Link

    A hyperlink that opens the user's email client to send a message.

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    Absolute Hyperlink

    A link with the full URL, including the protocol and domain.

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    Ordered List

    A list that maintains a distinct order, using numbers or letters.

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    HTML Tag for Ordered List

    The <ol> tag is used to define an ordered list in HTML.

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    List Item Tag

    The <li> tag is used for each item in a list.

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    Unordered List

    A list that does not maintain a specific order, using bullets.

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    HTML Tag for Unordered List

    The <ul> tag defines an unordered list in HTML.

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    Description List

    A list that defines terms with descriptions, using <dl> tag.

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    Description Term Tag

    The <dt> tag is used to define a term in a description list.

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    Description Tag

    The <dd> tag provides the description for a term in a description list.

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    Nested List

    A list containing another list as an item, for outlining structures.

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    HTML Structure Tags

    <ol>, <ul>, <dl>, <li>, <dt>, <dd> are used for lists.

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    Web Hosting

    Service for storing websites on servers for user access.

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    Search Engine

    Tool to find information online using algorithms.

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    TCP/IP Protocol

    Main rules for communication over the Internet.

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    HTTP

    Protocol for exchanging files and resources on the web.

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    HTTPS

    Secure version of HTTP for encrypted communications.

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    Internet Service Provider (ISP)

    Organization providing access to the Internet and related services.

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    Client-Server Architecture

    Model where servers provide resources to client devices.

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    Web Server

    Computer running software to serve web content.

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    Algorithm

    Set of rules for processing data, used by search engines.

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    Study Notes

    Internet Overview

    • The Internet is a global network of interconnected computer networks
    • Uses TCP/IP protocols for communication
    • Connects millions of private, public, academic, business, and government networks.

    Computer Networks

    • A network connects two or more computers (hosts) to share resources.
    • Each device on a network is a node with a unique address.
    • Protocols (rules) govern communication between computers.
    • Networks facilitate communication (email, messaging, video conferencing) and sharing of data.

    Network Properties

    • Facilitate communication
    • Permit sharing of data and information
    • Share network and computing resources (e.g., printers)
    • Can be insecure (vulnerable to hacking)
    • Can be costly to set up

    Network Types

    • Local Area Network (LAN): Connects computers in a limited area (home, office).
    • Wide Area Network (WAN): Spans large geographic areas (cities, countries).
    • Intranet: A private network within an organization using Internet protocols.
    • Extranet: A network that extends an organization's intranet to authorized external users.
    • Enterprise Private Network: Connects multiple company sites, sharing resources.
    • Virtual Private Network (VPN): A network that uses parts of a larger network (e.g., Internet) for secure communication.

    Network Topologies

    • Bus Network: All devices are connected to a single cable.
    • Star Network: All devices connect to a central hub.
    • Ring Network: Devices connected in a ring, data passes sequentially.
    • Mesh Network: Each device connects to multiple other devices.
    • Fully Connected Network: Every device connects to every other device.
    • Network topologies define how devices relate within a network (logically and physically).

    Internet History

    • The U.S. Defense Department funded ARPANET (predecessor to the Internet) in 1969 to develop a secure network.
    • ARPANET evolved into protocols for communicating across multiple networks, leading to TCP/IP.
    • The Internet expanded rapidly, connecting more computers and services.

    Internet Protocols

    • TCP/IP: A suite of protocols that define how data is transmitted over the Internet.
    • HTTP (Hypertext Transfer Protocol): Used for transferring web pages.
    • HTTPS: Secure version of HTTP.
    • FTP (File Transfer Protocol): Used for transferring files.

    Key Web Concepts

    • Web Page: A single document on the Internet.
    • Web Site: A collection of several Web pages.
    • URL (Uniform Resource Locator): An address that indicates the location of a resource on the web (e.g., protocol, domain name, etc.).
    • Browsers: Software used to access and view web pages.
    • Servers: Computers that store web pages and make them available to users.
    • HTML (HyperText Markup Language): The programming language used to create web pages.
    • Internet Protocol standard ensures data transmission protocols.

    Search Engines

    • Search engines allow users to find information on the web.
    • Organize, store, and analyze information from the Internet.
    • Search results based on keyword match.

    Network Architecture

    • Client-server architecture is used on the Internet.
    • Servers provide services (e.g., web pages).
    • Clients request and use these services.

    Web Design

    • Client/server architecture is foundational to internet services.
    • Web Servers host web pages.
    • Clients (users) access web pages through web browsers.

    Other Important Concepts

    • HTML tags describe content and structure.
    • Website structure is organized to aid navigation.
    • Multiple colors can help create useful websites.
    • Web accessibility means designing websites usable by everyone, including users with disabilities.

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    Description

    This quiz explores the fundamentals of computer networks, including types such as LAN and WAN, and their properties and protocols. It highlights how networks facilitate communication and data sharing among users. Test your knowledge of the Internet and networking concepts.

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