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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?
Which attack aims to overload the network with a high volume of traffic in order to exhaust computer resources?
Which protocol is vulnerable to IP Spoofing attack and Fragmentation attack?
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?
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Which attack attempts to learn or make use of information from the system but does not affect system resources?
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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?
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Which attack aims to overload the network with a high volume of traffic in order to exhaust computer resources?
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Which protocol is vulnerable to IP Spoofing attack and Fragmentation attack?
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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?
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Which attack attempts to learn or make use of information from the system but does not affect system resources?
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Which of the following best describes the purpose of DNS?
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What is DNS commonly used for?
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What type of response is resolved from the authoritative DNS server for the queried domain name?
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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?
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What is the purpose of caching query results on the local DNS server?
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Which server does the DNS client query when trying to resolve a domain name with the .com top-level domain?
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What does the DNS client receive when the query is resolved from the authoritative DNS server?
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What is the purpose of the DNS zone?
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Which of the following is a vulnerability/threat in the DNS scheme?
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Which protocol is vulnerable to IP Spoofing attack and Fragmentation attack?
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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.