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What is the primary goal of DNS over TLS (DoT) in cloud environments?
a. Performance enhancement
b. Encryption of DNS queries
c. Scalability
d. Reducing server load
Answer: b. Encryption of DNS queriescloudflare+1
Which protocol does DoT use for encrypting DNS traffic?
a. UDP
b. TCP
c. ICMP
d. HTTP
Answer: b. TCPdevelopers.cloudflare+1
What is the default port for DoT communication?
a. 53
b. 443
c. 853
d. 80
Answer: c. 853dnsfilter+2
DNS over TLS operates at which layer of the OSI model?
a. Network
b. Transport
c. Application
d. Session
Answer: b. Transportdevelopers.cloudflare+1
What does the TLS handshake achieve in DoT?
a. Authentication and encryption
b. Compression
c. DNS filtering
d. Load balancing
Answer: a. Authentication and encryptioninfoblox+1
Which RFC specifies DoT?
a. RFC 8484
b. RFC 7858
c. RFC 5321
d. RFC 1035
Answer: b. RFC 7858infoblox+1
DoT helps protect DNS traffic from which type of attacker?
a. Man-in-the-middle
b. Phishing
c. Insider
d. Ransomware
Answer: a. Man-in-the-middlecloudflare+1
What remains visible to network administrators when using DoT?
a. Actual DNS domain content
b. Encrypted packet headers
c. DNS traffic type and port
d. User credentials
Answer: c. DNS traffic type and portcatchpoint+1
What key privacy issue does DoT resolve compared to traditional DNS?
a. Load balancing
b. Plaintext transmission
c. High latency
d. Server overload
Answer: b. Plaintext transmissiondnsfilter+2
Organizations prefer DoT over DoH for what reason?
a. Easier browser integration
b. Port-based traffic visibility
c. Faster query speeds
d. Wider application support
Answer: b. Port-based traffic visibilitycatchpoint
Does DoT support DNSSEC validation?
a. No
b. Yes
c. Only for HTTPS
d. Only on port 80
Answer: b. Yesdevelopers.google+1
What method is used to initiate a secure DoT session?
a. UDP handshake
b. TLS handshake over TCP port 853
c. FTP handshake
d. ICMP handshake
Answer: b. TLS handshake over TCP port 853developers.cloudflare+1
Which types of attacks does DoT defend against?
a. DNS spoofing
b. SQL Injection
c. XSS
d. DDoS
Answer: a. DNS spoofingtechdocs.akamai+2
Compared to standard DNS, what overhead does DoT introduce?
a. Higher latency due to encryption
b. Reduced reliability
c. Increased packet loss
d. Lower bandwidth usage
Answer: a. Higher latency due to encryptioncloudflare+1
Which cloud DNS provider supports DoT on IPs like 1.1.1.1?
a. AWS
b. Cloudflare
c. Azure
d. Google Cloud
Answer: b. Cloudflaredevelopers.cloudflare
When is DoT typically preferred over DoH?
a. When privacy should be secondary
b. Where network control and visibility are needed
c. For browser-only protection
d. For mobile-only solutions
Answer: b. Where network control and visibility are neededcatchpoint
What information is always encrypted in DoT queries?
a. Domain names only
b. Query and response payload
c. Server logs
d. IP address only
Answer: b. Query and response payloaddnsfilter+1
Which operating systems commonly support DoT natively?
a. Windows only
b. Linux and Android
c. macOS only
d. Chrome OS only
Answer: b. Linux and Androidcloudflare+1
Does DoT hide DNS traffic completely on a network?
a. Yes, no visibility remains
b. No, traffic type and port are still visible
c. Only for internal queries
d. Yes, for all outgoing packets
Answer: b. No, traffic type and port are still visiblecatchpoint+1
How can a cloud user verify a DoT session is established?
a. Check that DNS requests use port 53
b. Confirm TLS session on port 853
c. Look for HTTP headers
d. Monitor ICMP traffic
Answer: b. Confirm TLS session on port 853dnsfilter+1
Which entity maintains the RFC standard for DoT?
a. IETF
b. IEEE
c. W3C
d. ISO
Answer: a. IETFinfoblox+1
DoT enhances privacy for which type of DNS traffic?
a. All device queries system-wide
b. Only browser queries
c. Only mobile devices
d. Only server-side traffic
Answer: a. All device queries system-widedevelopers.cloudflare+1
Why is port 853 used for DoT?
a. It is reserved for encrypted web traffic
b. It is the default port defined by RFC 7858
c. It offers faster UDP performance
d. Required for all HTTPS traffic
Answer: b. It is the default port defined by RFC 7858infoblox+2
What security vulnerability does DoT directly address?
a. Unencrypted DNS “last mile”
b. Large DNS zones
c. High availability
d. DNS caching
Answer: a. Unencrypted DNS “last mile”cloudflare+2
Is DoT effective in preventing DNS-based censorship?
a. Yes, in all cases
b. Only against some methods
c. No, not at all
d. Only on private clouds
Answer: b. Only against some methodscatchpoint+1
Which step occurs first in DoT communication?
a. DNS packet encryption
b. TCP connection establishment
c. TLS handshake
d. Private key exchange
Answer: b. TCP connection establishmentinfoblox+1
Which TLS versions are generally supported in DoT?
a. SSLv2 only
b. TLS 1.2 and 1.3
c. SSLv3 only
d. TLS 1.1 and below
Answer: b. TLS 1.2 and 1.3developers.cloudflare
What is a stub resolver in a DoT setup?
a. Server for full DNS zones
b. Client making DNS queries
c. IPSec endpoint
d. DHCP server
Answer: b. Client making DNS queriesdevelopers.cloudflare
DoT is most beneficial for which cloud security principle?
a. Availability
b. Confidentiality
c. Scalability
d. Disaster recovery
Answer: b. Confidentialitydnsfilter+1
Which alternative to DoT exists for DNS encryption?
a. DNS over UDP
b. DNS over HTTPS (DoH)
c. FTP over TLS
d. DHCP over SSL
Answer: b. DNS over HTTPS (DoH)cloudflare+2
Pipelining queries in DoT sessions improves what?
a. Encryption strength
b. Performance
c. QoS
d. Network address translation
Answer: b. Performancecatchpoint
Which entity can still track DNS queries with DoT, given control of the resolver?
a. Root CA
b. DNS resolver itself
c. Web browser vendor
d. Email provider
Answer: b. DNS resolver itselfdnsfilter+1
What are the roles of DNS over TLS in cloud computing?
a. Stream encryption, privacy, anti-tampering
b. Physical security
c. Disaster recovery
d. Application monitoring
Answer: a. Stream encryption, privacy, anti-tamperinginfoblox+2
Which is the main technical limitation of DoT compared to standard DNS?
a. Requires specialized hardware
b. Uses more bandwidth
c. Increased processing and latency
d. Only supports IPv6
Answer: c. Increased processing and latencycloudflare+1
DoT encrypts traffic between what two points?
a. Two web servers
b. DNS client and DNS resolver
c. Two data centers
d. User and firewall
Answer: b. DNS client and DNS resolverdnsfilter+1
What does a TLS certificate provide in the context of DoT?
a. Traffic compression
b. Packet routing
c. Authentication and session encryption
d. DNS zone transfer
Answer: c. Authentication and session encryptioninfoblox+1
Which applications typically benefit from DoT in the cloud?
a. Realtime streaming only
b. DNS resolution for all services
c. Video conferencing only
d. Large file transfer only
Answer: b. DNS resolution for all servicescloudflare+2
DoT can be deployed using which configuration model?
a. Device-wide or network-level
b. Browser plug-in only
c. USB stick installation only
d. E-mail configuration only
Answer: a. Device-wide or network-levelcatchpoint+1
What critical security threat does DoT aim to mitigate in cloud settings?
a. Data exfiltration via DNS
b. Phishing via HTTPS
c. Credential stuffing attacks
d. Browser hijacking
Answer: a. Data exfiltration via DNStechdocs.akamai+2
Monitoring DoT traffic is possible via which network trait?
a. DNS query content
b. Port 853 inspection
c. HTTP packet analysis
d. Application-layer proxy
Answer: b. Port 853 inspectioncatchpoint+1
What is a technical barrier to universal DoT adoption?
a. Lack of browser support
b. Resolver and client compatibility with DoT
c. IPv6 deployment difficulty
d. Absence of DNS zones
Answer: b. Resolver and client compatibility with DoTdevelopers.cloudflare+2
What best describes DNS query privacy with DoT?
a. Traffic is public
b. DNS queries are encrypted and protected
c. Only queries for .com domains are secured
d. DNSSEC validation required
Answer: b. DNS queries are encrypted and protecteddnsfilter+1
What makes DoT suitable for cloud-based enterprise environments?
a. Dedicated port allows visibility and policy enforcement
b. Low encryption standards
c. Only browser support
d. No integration with cloud platforms
Answer: a. Dedicated port allows visibility and policy enforcementcloudns+1
Why might a cloud provider prefer DoH over DoT?
a. To bypass restrictions and hide DNS traffic in HTTPS streams
b. For higher latency
c. For more visible traffic
d. For exclusive browser use
Answer: a. To bypass restrictions and hide DNS traffic in HTTPS streamscloudflare+1
What is often required on cloud endpoints to use DoT?
a. Custom resolver configuration
b. Antivirus installation
c. USB security token
d. Disabling TCP
Answer: a. Custom resolver configurationdevelopers.cloudflare+1
In which layer is the TLS handshake performed for DoT?
a. Application
b. Transport
c. Physical
d. Data link
Answer: b. Transportdnsfilter+1
What possible downside can DoT introduce to high-frequency DNS applications in the cloud?
a. Decreased privacy
b. Performance overhead due to encryption
c. Increased compatibility
d. Reduced security
Answer: b. Performance overhead due to encryptioncatchpoint+1
Which DNS encryption protocol is more transparent to end-users in web applications?
a. DNS over TLS
b. DNS over HTTPS
c. DNS over UDP
d. DNS over SSL
Answer: b. DNS over HTTPScloudflare+1
DoT contributes to which aspect of cloud compliance?
a. Data privacy and confidentiality standards
b. Application performance
c. Unlimited storage
d. Billing transparency
Answer: a. Data privacy and confidentiality standardsinfoblox+2
Which organization advocates for encrypted DNS standards like DoT?
a. ICANN
b. IETF
c. IEEE
d. W3C
Answer: b. IETFinfoblox+1

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