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DNS Fundamentals Quiz
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DNS Fundamentals Quiz

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Questions and Answers

Which attack involves changing DNS records on a DNS server or DNS cache server to redirect network traffic from a legitimate web server to a malicious website?

  • IP Spoofing attack
  • ARP Cache-poisoning attack
  • DNS flood attack
  • DNS Cache-poisoning attack (correct)
  • Which attack aims to overload the network with a high volume of traffic in order to exhaust computer resources?

  • DNS Cache-poisoning attack
  • ARP Cache-poisoning attack
  • IP Spoofing attack
  • DNS flood attack (correct)
  • Which protocol is vulnerable to IP Spoofing attack and Fragmentation attack?

  • TCP
  • ICMP
  • ARP
  • IP (correct)
  • Which attack aims to modify data or create a false stream, such as masquerade, replay, modification of messages, man-in-the-middle (MITM), and DoS/DDoS?

    <p>Active attack</p> Signup and view all the answers

    Which attack attempts to learn or make use of information from the system but does not affect system resources?

    <p>Passive attack</p> Signup and view all the answers

    Which attack involves changing DNS records on a DNS server or DNS cache server to redirect network traffic from a legitimate web server to a malicious website?

    <p>DNS Cache-poisoning attack</p> Signup and view all the answers

    Which attack aims to overload the network with a high volume of traffic in order to exhaust computer resources?

    <p>DNS flood attack</p> Signup and view all the answers

    Which protocol is vulnerable to IP Spoofing attack and Fragmentation attack?

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

    Which attack aims to modify data or create a false stream, such as masquerade, replay, modification of messages, man-in-the-middle (MITM), and DoS/DDoS?

    <p>Active attack</p> Signup and view all the answers

    Which attack attempts to learn or make use of information from the system but does not affect system resources?

    <p>Passive attack</p> Signup and view all the answers

    Which of the following best describes the purpose of DNS?

    <p>To convert human readable names into IP addresses</p> Signup and view all the answers

    What is DNS commonly used for?

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

    What type of response is resolved from the authoritative DNS server for the queried domain name?

    <p>Authoritative response</p> Signup and view all the answers

    When using a PC from QUT's computer lab and entering http://library.qut.edu.au in the web browser, which DNS server does the DNS client service contact?

    <p>QUT's DNS server</p> Signup and view all the answers

    What is the purpose of caching query results on the local DNS server?

    <p>To improve DNS performance</p> Signup and view all the answers

    Which server does the DNS client query when trying to resolve a domain name with the .com top-level domain?

    <p>Com TLD server</p> Signup and view all the answers

    What does the DNS client receive when the query is resolved from the authoritative DNS server?

    <p>Authoritative response</p> Signup and view all the answers

    What is the purpose of the DNS zone?

    <p>To store computer names and their IP addresses</p> Signup and view all the answers

    Which of the following is a vulnerability/threat in the DNS scheme?

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

    Which protocol is vulnerable to IP Spoofing attack and Fragmentation attack?

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

    Study Notes

    Types of Cyber Attacks

    • DNS Spoofing involves altering DNS records on a server or cache to divert traffic from a legitimate site to a malicious one.
    • Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks aim to overwhelm networks with excessive traffic, draining resources and disrupting services.
    • Protocols susceptible to IP Spoofing and Fragmentation attacks include various network protocols, particularly those that handle packets without proper source validation.
    • Data Modification Attacks encompass activities like masquerading, replaying messages, altering data, man-in-the-middle (MITM) methods, and DoS/DDoS strategies, all aimed at falsifying data streams.
    • Information Gathering Attacks seek to extract useful information from systems without impacting resource availability.

    Domain Name System (DNS) Overview

    • The primary purpose of DNS is to translate user-friendly domain names into IP addresses, enabling user access to online content.
    • DNS is commonly utilized for resolving domain names into their respective IP addresses for web services.
    • An authoritative DNS server provides comprehensive answers for queries related to its specific domain, returning resolved response data.
    • When accessing a URL, such as http://library.qut.edu.au, the DNS client contacts the local DNS server or the one assigned by the network.
    • Caching query results on local DNS servers improves efficiency by storing previous responses, reducing resolution time for repeated queries.
    • Queries for domain names under the .com top-level domain are typically resolved by the DNS client querying the central root DNS servers and subsequently reaching the authoritative server for .com.
    • Upon resolution from the authoritative DNS server, the DNS client receives the corresponding IP address for the queried domain.
    • DNS zones serve as distinct sections within the DNS namespace, allowing for the management of DNS records and delegation of authority over subdomains.

    DNS Vulnerabilities

    • The DNS system is susceptible to various threats and vulnerabilities, such as cache poisoning and DNS spoofing attacks.

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    Description

    Test your knowledge on DNS (Domain Name System) and its role in converting human readable names into IP addresses on a network. Learn how DNS functions as a directory service, similar to a phone book, and allows users to use computer names instead of IP addresses. Explore the applications that rely on DNS for name-to-address resolution.

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