MCQs

Disclaimer:

Educational Use Only:

The website links provided are to be used strictly for educational and knowledge-gaining purposes only.

No Misuse:

Do not misuse the links or the information contained therein for any commercial, illegal, or unethical activities.

Respect for Websites and Businesses:

Respect the intellectual property and business interests of the websites and their owners. Do not attempt to alter, copy, or redistribute content without proper authorization.

Acknowledge Value of Knowledge:

Recognize and value the knowledge and resources shared by these websites. Use the information responsibly and ethically.

No Endorsement:

The provision of these links does not imply endorsement of the linked sites, their content, or their products and services. Users are responsible for evaluating the suitability and accuracy of the information.

User Responsibility:

By accessing these links, you agree to use the information at your own risk and to comply with all applicable laws and website terms of use.

What is the primary purpose of Domain Name Resolution in cybersecurity?
a. Translating human-readable domain names into IP addresses
b. Encrypting website traffic
c. Blocking malicious websites
d. Managing user passwords
Answer: a. Translating human-readable domain names into IP addressescloudflare+1
What does DNS stand for?
a. Domain Name System
b. Digital Network Service
c. Distributed Name Server
d. Data Node Structure
Answer: a. Domain Name Systemcloudflare
The DNS system is often compared to which of the following?
a. Internet firewall
b. Phonebook of the Internet
c. Encryption protocol
d. Web browser
Answer: b. Phonebook of the Internetcenterforcybersecuritypolicy+1
What does a DNS resolver do?
a. Stores websites
b. Translates domain names to IP addresses by querying DNS servers
c. Encrypts internet traffic
d. Filters email spam
Answer: b. Translates domain names to IP addresses by querying DNS serverskaspersky+1
What is the first step in the DNS resolution process when a user types a web address?
a. The browser sends a request to the OS’s DNS resolver
b. The root server responds with an IP address
c. The domain name is encrypted
d. The firewall blocks the request
Answer: a. The browser sends a request to the OS’s DNS resolveritjones
What type of DNS query requires the DNS resolver to provide the final answer or an error?
a. Iterative query
b. Recursive query
c. Broadcast query
d. Direct query
Answer: b. Recursive queryitjones
Which servers hold the information about top-level domains (such as .com or .org) during DNS resolution?
a. Root name servers
b. Authoritative name servers
c. TLD name servers
d. Cache servers
Answer: c. TLD name serverswikipedia+1
What is an authoritative name server in DNS?
a. The server where all DNS requests start
b. The server that contains the final IP address information for a domain
c. A server used for DNS caching
d. A server that encrypts DNS queries
Answer: b. The server that contains the final IP address information for a domainwikipedia+1
What is DNS caching?
a. Temporary storage of DNS query results to speed up future queries
b. Encrypting DNS traffic
c. Blocking malicious domains
d. Storing passwords
Answer: a. Temporary storage of DNS query results to speed up future querieswikipedia+1
What is the role of root name servers in DNS?
a. They store the specific IP for every domain
b. They direct queries to the appropriate TLD servers
c. They encrypt DNS data
d. They block unsafe domains
Answer: b. They direct queries to the appropriate TLD serverskaspersky+1
Why is DNS security important in cybersecurity?
a. DNS infrastructure is a common vector for attacks and malware delivery
b. DNS encrypts all internet traffic by default
c. DNS stores user passwords
d. DNS blocks all phishing websites automatically
Answer: a. DNS infrastructure is a common vector for attacks and malware deliverycenterforcybersecuritypolicy
What is Protective DNS?
a. A DNS service with enhanced security features to block malicious domains and malware
b. A type of firewall
c. A new internet protocol
d. A password management tool
Answer: a. A DNS service with enhanced security features to block malicious domains and malwarecenterforcybersecuritypolicy
What does DNSSEC provide?
a. Protection against DNS spoofing by validating DNS data authenticity
b. Complete encryption of DNS traffic
c. Password protection for websites
d. Faster DNS resolution
Answer: a. Protection against DNS spoofing by validating DNS data authenticitycenterforcybersecuritypolicy
Which DNS security feature encrypts DNS queries to protect user privacy?
a. DNSSEC
b. DNS over TLS (DoT)
c. Recursive DNS
d. Authoritative DNS
Answer: b. DNS over TLS (DoT)centerforcybersecuritypolicy
What potential risk arises if a DNS server is compromised?
a. Unauthorized access or redirection of internet traffic without user detection
b. Automatic password reset of users
c. Faster internet speeds
d. Loss of all stored emails
Answer: a. Unauthorized access or redirection of internet traffic without user detectioncenterforcybersecuritypolicy
Which of these is NOT a type of DNS server?
a. Root name server
b. Authoritative name server
c. Resolving (recursive) name server
d. Firewall server
Answer: d. Firewall serverkaspersky
What is the term for the address format that DNS translates domain names into?
a. IP address
b. MAC address
c. Email address
d. URL
Answer: a. IP addresscloudflare
DNS commonly handles which two versions of IP addresses?
a. IPv2 and IPv3
b. IPv4 and IPv6
c. IPV7 and IPV8
d. None of the above
Answer: b. IPv4 and IPv6itjones
What is a DNS “time-to-live” (TTL) setting?
a. The duration that a DNS record is cached before it is refreshed
b. The lifetime of a domain name registration
c. The expiration of a user’s password
d. The time a website stays online
Answer: a. The duration that a DNS record is cached before it is refreshedwikipedia
What kind of DNS query returns the best available answer without asking other servers?
a. Recursive query
b. Caching query
c. Iterative query
d. Broadcast query
Answer: c. Iterative querywikipedia
How does DNS contribute to network security in a zero-trust architecture?
a. By acting as a control point to block or allow domain-based requests
b. It does not contribute
c. It encrypts user data end-to-end
d. It stores user credentials
Answer: a. By acting as a control point to block or allow domain-based requestscenterforcybersecuritypolicy
What is “DNS spoofing”?
a. An attack in which false DNS responses redirect users to malicious sites
b. A method to speed up DNS queries
c. A type of encryption standard
d. A DNS backup system
Answer: a. An attack in which false DNS responses redirect users to malicious sitescenterforcybersecuritypolicy
What does “recursive DNS server” mean?
a. A DNS server that handles queries fully by querying other DNS servers on behalf of the client
b. A server that encrypts DNS traffic
c. A server that caches passwords
d. A server that blocks malware
Answer: a. A DNS server that handles queries fully by querying other DNS servers on behalf of the clientwikipedia
Which entity manages the root DNS servers?
a. IANA (Internet Assigned Numbers Authority)
b. WHOIS
c. ICANN
d. ISPs
Answer: a. IANA (Internet Assigned Numbers Authority)itjones
Can DNS be used to deliver malware or aid cyberattacks?
a. Yes, attackers use DNS for command and control, data exfiltration, and malware delivery
b. No, DNS only translates names and cannot be used maliciously
c. No, DNS is fully encrypted by default
d. Yes, but only for sending legitimate updates
Answer: a. Yes, attackers use DNS for command and control, data exfiltration, and malware deliverycenterforcybersecuritypolicy
What is the difference between an authoritative DNS server and a recursive resolver?
a. Authoritative servers have final domain info; recursive resolvers query multiple servers to find info
b. Recursive resolvers store websites; authoritative servers block spam
c. Recursive resolvers encrypt DNS data; authoritative servers decrypt it
d. There is no difference
Answer: a. Authoritative servers have final domain info; recursive resolvers query multiple servers to find infokaspersky
Why do DNS queries often start at a root name server?
a. Because it knows locations of all top-level domain servers
b. To encrypt the query
c. To validate the requester
d. To block malicious domains
Answer: a. Because it knows locations of all top-level domain serverswikipedia
What is DNS over HTTPS (DoH)?
a. A protocol that encrypts DNS queries using HTTPS to improve privacy
b. A DNS server type
c. A malware detection tool
d. A way to speed up DNS resolution
Answer: a. A protocol that encrypts DNS queries using HTTPS to improve privacycenterforcybersecuritypolicy
How do DNS resolvers improve efficiency?
a. By caching responses for a TTL period and reducing repeated queries
b. By encrypting all DNS traffic
c. By blocking all unknown domain requests
d. By shutting down root servers
Answer: a. By caching responses for a TTL period and reducing repeated querieswikipedia
What would happen if root DNS servers fail?
a. Most internet domain name resolutions would fail, disrupting access to websites
b. Users would be redirected automatically to alternate DNS servers
c. No impact, because root servers are not important
d. Internet speed would simply slow down
Answer: a. Most internet domain name resolutions would fail, disrupting access to websitescenterforcybersecuritypolicy
What is a zone file in DNS?
a. A file that contains mappings of domain names to IP addresses for a domain
b. A file containing email logins
c. A cache of all internet traffic
d. A list of blocked websites
Answer: a. A file that contains mappings of domain names to IP addresses for a domainwikipedia
What is DNS tunneling?
a. A method of encoding data within DNS queries to bypass network controls
b. Encrypting DNS queries for security
c. A way to speed DNS resolution
d. Blocking unauthorized users
Answer: a. A method of encoding data within DNS queries to bypass network controlscenterforcybersecuritypolicy
Which type of DNS record maps a domain name to an IPv4 address?
a. A record
b. MX record
c. CNAME record
d. TXT record
Answer: a. A recorditjones
Which DNS record type is used to map a domain name to an IPv6 address?
a. AAAA record
b. SRV record
c. PTR record
d. NS record
Answer: a. AAAA recorditjones
What is the significance of “DNS hierarchy”?
a. DNS is organized in a distributed, hierarchical manner from root to subdomains
b. DNS is a flat list of domain names
c. DNS only operates on a single server
d. DNS is unstructured
Answer: a. DNS is organized in a distributed, hierarchical manner from root to subdomainswikipedia
What identifies the domain extension in a domain name like “www.example.com“?
a. The Top-Level Domain (TLD), here “.com”
b. The full domain name
c. The root name server
d. The IP address
Answer: a. The Top-Level Domain (TLD), here “.com”itjones
Which DNS component directly communicates with end-user devices?
a. Recursive resolver
b. Root server
c. Authoritative server
d. Cache server
Answer: a. Recursive resolverkaspersky
Why is DNS considered a critical infrastructure component?
a. It enables all internet domain name resolutions, critical for internet access
b. It stores user data
c. It encrypts all internet traffic
d. It blocks viruses from websites
Answer: a. It enables all internet domain name resolutions, critical for internet accesscenterforcybersecuritypolicy
How does DNS poisoning affect users?
a. By redirecting users to fraudulent or malicious websites
b. By speeding up web access
c. By encrypting DNS requests
d. By blocking ads
Answer: a. By redirecting users to fraudulent or malicious websitescenterforcybersecuritypolicy
What can be done to protect DNS infrastructure?
a. Use DNSSEC, encrypted DNS protocols, and monitor DNS traffic for anomalies
b. Disable internet access
c. Remove all DNS servers
d. Avoid using domain names
Answer: a. Use DNSSEC, encrypted DNS protocols, and monitor DNS traffic for anomaliescenterforcybersecuritypolicy
What is an example of encrypted DNS technology?
a. DNS over HTTPS (DoH)
b. DNS forwarding
c. IP masking
d. Packet sniffing
Answer: a. DNS over HTTPS (DoH)centerforcybersecuritypolicy
What role does DNS play in phishing attacks?
a. Phishing sites may use deceptive domain names or compromised DNS to redirect users
b. DNS blocks phishing automatically
c. DNS encrypts all phishing emails
d. DNS identifies phishing websites and removes them
Answer: a. Phishing sites may use deceptive domain names or compromised DNS to redirect userscenterforcybersecuritypolicy
What is the purpose of a DNS query?
a. To ask DNS servers for the IP address of a domain name
b. To send an email
c. To encrypt data
d. To log internet usage
Answer: a. To ask DNS servers for the IP address of a domain namecloudflare
What happens during an iterative DNS query?
a. Each DNS server responds with the best information it has or refers to another server
b. The client waits for all servers to respond simultaneously
c. DNS data is encrypted
d. The server blocks the query
Answer: a. Each DNS server responds with the best information it has or refers to another serverwikipedia
What is the common risk of unprotected DNS servers?
a. They can be exploited for DDoS attacks or to redirect traffic maliciously
b. They improve internet speed
c. They protect user data naturally
d. They block all malware
Answer: a. They can be exploited for DDoS attacks or to redirect traffic maliciouslycenterforcybersecuritypolicy
What is a DNS resolver cache poisoning attack?
a. Attackers insert fake entries into a DNS server’s cache to redirect traffic
b. Encrypting DNS traffic
c. Blocking malware via DNS
d. Spamming DNS servers
Answer: a. Attackers insert fake entries into a DNS server’s cache to redirect trafficcenterforcybersecuritypolicy
DNS uses which port on the internet?
a. Port 53
b. Port 80
c. Port 443
d. Port 22
Answer: a. Port 53 [general networking knowledge]
What is meant by a “fully qualified domain name” (FQDN)?
a. A complete domain name specifying its exact location in DNS hierarchy, e.g., www.example.com
b. A domain name without extension
c. An IP address
d. A password
Answer: a. A complete domain name specifying its exact location in DNS hierarchy, e.g., www.example.com[5]
What happens if a DNS request times out during resolution?
a. The domain resolution fails and the website cannot be accessed
b. The request automatically switches to another protocol
c. The domain name resolves faster
d. The firewall blocks the device
Answer: a. The domain resolution fails and the website cannot be accesseditjones
How does Protective DNS help in cybersecurity?
a. By blocking access to known malicious domains in real time during domain resolution
b. By speeding up DNS queries
c. By encrypting emails
d. By preventing user login
Answer: a. By blocking access to known malicious domains in real time during domain resolutioncenterforcybersecuritypolicy

Blog

Systemethic Technologies

Leave a Reply Cancel reply

Useful links

Other Terms & Policies

Contact Info