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- What does DNSSEC stand for?
a. Domain Number System Extended Certification
b. Domain Name Security Encryption Channel
c. Domain Name System Security Extensions
d. Data Network Security System Encryption
Answer: c. Domain Name System Security Extensionsgeeksforgeeks - What is the main goal of DNSSEC?
a. Speed up DNS responses
b. Provide security and verify authenticity of DNS responses
c. Assign IP addresses
d. Encrypt all web traffic
Answer: b. Provide security and verify authenticity of DNS responsescloudflare+1 - What type of attack does DNSSEC help prevent?
a. Phishing
b. Cache poisoning
c. DDoS
d. Brute force
Answer: b. Cache poisoninggeeksforgeeks+1 - What basic problem does standard DNS have?
a. Too slow
b. No built-in security
c. Needs lots of storage
d. Uses encryption by default
Answer: b. No built-in securitycloudflare+1 - By what main mechanism does DNSSEC assure integrity and authenticity?
a. Encrypted data transfers
b. Digital signatures
c. Hidden records
d. Password protection
Answer: b. Digital signaturesgeeksforgeeks+1 - What record in DNSSEC contains a digital signature for DNS data?
a. DS
b. RRSIG
c. A
d. TXT
Answer: b. RRSIGcloudflare+1 - What does a DNSKEY record store?
a. IP addresses
b. Email servers
c. Public keys
d. MAC addresses
Answer: c. Public keysgeeksforgeeks+1 - Which of these is NOT a benefit of DNSSEC?
a. Authenticates DNS data
b. Ensures data integrity
c. Encrypts all internet traffic
d. Prevents spoofed DNS responses
Answer: c. Encrypts all internet trafficcloudflare+1 - What is a DS (Delegation Signer) record used for?
a. Mapping domains to IPs
b. Verifying DNSKEY in child zones
c. Listing email servers
d. Caching DNS data
Answer: b. Verifying DNSKEY in child zonesgeeksforgeeks+1 - Which protocol does DNSSEC mainly enhance?
a. FTP
b. HTTPS
c. DNS
d. SMTP
Answer: c. DNScloudflare+1 - What is a “chain of trust” in DNSSEC?
a. A hierarchy of IP addresses
b. A sequence of encrypted messages
c. Validating DNS data from root to domain
d. Physical server connections
Answer: c. Validating DNS data from root to domaingeeksforgeeks+1 - What broadly happens when a DNS resolver gets a DNSSEC-signed record?
a. It ignores it
b. It verifies the digital signature
c. It compresses the data
d. It converts it to a MAC address
Answer: b. It verifies the digital signaturecloudflare+1 - Why is DNSSEC not universally deployed yet?
a. Too expensive IP addresses
b. Complexity and need for new configuration
c. Compatibility with every device
d. Simple to use with no drawbacks
Answer: b. Complexity and need for new configurationgeeksforgeeks+1 - Which of the following is a function of NSEC records?
a. Caches DNS queries
b. Authenticated denial of existence
c. Encrypts DNS data
d. Assigns keys
Answer: b. Authenticated denial of existencecloudflare+1 - DNSSEC uses which cryptographic principle?
a. Symmetric encryption
b. Hash tables
c. Public-key cryptography
d. Simple passwords
Answer: c. Public-key cryptographygeeksforgeeks+1 - What will DNSSEC prevent if implemented?
a. Data theft from hard drives
b. Attackers redirecting users with forged DNS answers
c. Slow web browsing
d. Large file transfers
Answer: b. Attackers redirecting users with forged DNS answerscloudflare+1 - What is a KSK (Key Signing Key) used for in DNSSEC?
a. Encrypting messages
b. Signing DNSKEY records
c. Calculating IP addresses
d. Resolving DNS requests
Answer: b. Signing DNSKEY recordsgeeksforgeeks+1 - What is a ZSK (Zone Signing Key) used for?
a. Signing individual DNS records
b. Assigning email servers
c. Managing routing
d. Registering domain names
Answer: a. Signing individual DNS recordscloudflare+1 - What happens if the chain of trust is broken in DNSSEC?
a. Web pages load faster
b. DNSSEC validation fails
c. More spam emails are sent
d. Server power increases
Answer: b. DNSSEC validation failsgeeksforgeeks+1 - What type of threats does DNSSEC specifically address?
a. DDoS attacks
b. DNS spoofing and cache poisoning
c. Application errors
d. Malware downloads
Answer: b. DNS spoofing and cache poisoningcloudflare+1 - Which record type tells if a domain does NOT exist in DNSSEC?
a. NSEC
b. MX
c. AAAA
d. PTR
Answer: a. NSECgeeksforgeeks+1 - What is an RRSIG record linked to in DNSSEC?
a. Public keys
b. Individual resource record sets
c. Hardware addresses
d. Web content
Answer: b. Individual resource record setscloudflare+1 - What must be done regularly to maintain DNSSEC security?
a. Reboot the server
b. Key rollovers
c. Change IP addresses
d. Run antivirus scans
Answer: b. Key rolloversgeeksforgeeks+1 - In DNSSEC, what is the DS record published by?
a. Root zone only
b. Parent zone
c. Local network
d. Individual computers
Answer: b. Parent zonecloudflare+1 - If DNSSEC data cannot be validated, what should the resolver do?
a. Return the record as usual
b. Return a validation error
c. Redirect to a new server
d. Try a random IP address
Answer: b. Return a validation errorgeeksforgeeks+1 - Why does DNSSEC NOT encrypt responses?
a. To make it faster
b. Because it only cares about authenticity and integrity
c. Encryption is not possible
d. It blocks web browsing
Answer: b. Because it only cares about authenticity and integritycloudflare+1 - Why are separate KSK and ZSK keys used?
a. For style
b. To separate key management and minimize risk
c. Because one key is not enough
d. To increase data size
Answer: b. To separate key management and minimize riskgeeksforgeeks+1 - What happens if the signature on a DNSSEC record is invalid?
a. The data is still trusted
b. The data is considered compromised
c. It gets repaired
d. Nothing
Answer: b. The data is considered compromisedcloudflare+1 - Which major technology uses DNSSEC as a security foundation?
a. DANE (DNS-Based Authentication of Named Entities)
b. DHCP
c. FTP
d. POP3
Answer: a. DANE (DNS-Based Authentication of Named Entities)geeksforgeeks - What aspect of DNSSEC can lead to a higher operational cost?
a. Less hardware
b. Extra infrastructure and management
c. Fewer configuration files
d. Cheaper domain names
Answer: b. Extra infrastructure and managementgeeksforgeeks - What can be a performance effect of DNSSEC validation?
a. Makes queries always faster
b. Slight delay because of signature validation
c. Removes need for DNS servers
d. Instantly blocks all traffic
Answer: b. Slight delay because of signature validationcloudflare+1 - What record would you look at to validate a DNSSEC response for a subdomain?
a. DS
b. CNAME
c. TXT
d. SPF
Answer: a. DScloudflare+1 - Is DNSSEC backwards compatible with basic DNS?
a. Not at all
b. Fully, with no changes
c. Partially; non-DNSSEC and DNSSEC systems can coexist
d. Only works with IPv6
Answer: c. Partially; non-DNSSEC and DNSSEC systems can coexistgeeksforgeeks - Which is a challenge of DNSSEC?
a. Simplicity
b. Risk of misconfiguration
c. Less secure than DNS
d. Needs encryption certificates
Answer: b. Risk of misconfigurationgeeksforgeeks - The “root signing ceremony” is related to what in DNSSEC?
a. Key management for the root zone
b. Handing out addresses manually
c. Physical server upgrades
d. Email server configuration
Answer: a. Key management for the root zonecloudflare - What does DNSSEC use to prove “no such record exists”?
a. RRSIG
b. NSEC/NSEC3
c. DNSKEY
d. DS
Answer: b. NSEC/NSEC3cloudflare+1 - Why can zone walking be a problem with DNSSEC NSEC records?
a. It reveals hidden domains
b. It slows down queries
c. It blocks user access
d. It causes endless loops
Answer: a. It reveals hidden domainscloudflare - How can organizations ensure ongoing security with DNSSEC?
a. Regularly update their web servers
b. Perform regular key rollovers and monitor signatures
c. Change all IPs weekly
d. Only use static records
Answer: b. Perform regular key rollovers and monitor signaturesgeeksforgeeks+1 - What happens if a DNSSEC signature expires?
a. Data is still trusted
b. Data is considered invalid
c. A new record is added
d. No effect
Answer: b. Data is considered invalidgeeksforgeeks+1 - When DNSSEC is adopted by a Top-Level Domain (TLD), what is one immediate benefit?
a. Faster browsing
b. Greater data integrity and trust for the entire TLD
c. Cheaper domain names
d. More IP addresses
Answer: b. Greater data integrity and trust for the entire TLDgeeksforgeeks - Which group typically manages root DNSSEC keys?
a. Local ISPs
b. Global coordinators and trusted individuals
c. End users
d. Email providers
Answer: b. Global coordinators and trusted individualscloudflare - If a DNS response is signed by DNSSEC but not validated, what should a secure resolver do?
a. Issue a warning or refuse the response
b. Display the page anyway
c. Guess the IP address
d. Forward to another server
Answer: a. Issue a warning or refuse the responsecloudflare+1 - What is the main limitation of DNSSEC?
a. Works with only a few domains
b. Adds operational complexity and overhead
c. Doesn’t work with DNS
d. Only supports IPv6
Answer: b. Adds operational complexity and overheadgeeksforgeeks+1 - Which real-world example showcases early DNSSEC adoption?
a. Sweden’s .se TLD
b. China’s local ISPs
c. Wi-Fi routers
d. Individual mobile phones
Answer: a. Sweden’s .se TLDgeeksforgeeks - What must a registrar add for DNSSEC to work fully?
a. New server hardware
b. The DS record from the domain owner
c. Only A records
d. Usernames and passwords
Answer: b. The DS record from the domain ownercloudflare - What can happen if a parent zone does NOT have the proper DS record?
a. Nothing changes
b. Chain of trust is broken
c. Emails are blocked
d. IP addresses are lost
Answer: b. Chain of trust is brokencloudflare - What is one unique DNSSEC function compared to standard DNS?
a. Authenticated denial of existence
b. Email relay
c. File storage
d. Faster downloads
Answer: a. Authenticated denial of existencegeeksforgeeks+1 - Why might DNSSEC adoption be slow in some organizations?
a. Simple configuration
b. Skill and operational requirements
c. No interest in security
d. Doesn’t work for websites
Answer: b. Skill and operational requirementscloudflare+1 - What cryptographic component must be carefully managed in DNSSEC?
a. Certificates
b. Keys (KSK & ZSK)
c. Firewalls
d. Email addresses
Answer: b. Keys (KSK & ZSK)geeksforgeeks+1 - What happens if the DNSSEC chain of trust is validated all the way from the root to the requested domain?
a. The DNS response can be trusted as genuine
b. The response is ignored
c. A warning is shown
d. Data is hidden
Answer: a. The DNS response can be trusted as genuinecloudflare+1
