CompTIA
N10-005 · Question #635
Which of the following uses port 53 by default?
The correct answer is D. DNS. DNS (Domain Name System) uses port 53 by default, over both UDP (for standard queries) and TCP (for zone transfers or responses exceeding 512 bytes). RDP uses port 3389, QoS is a traffic prioritization mechanism not tied to a specific port, and DHCP uses ports 67 and 68.
Networking concepts
Question
Which of the following uses port 53 by default?
Options
- ARDP
- BQoS
- CDHCP
- DDNS
How the community answered
(61 responses)- A2% (1)
- B3% (2)
- C2% (1)
- D93% (57)
Explanation
DNS (Domain Name System) uses port 53 by default, over both UDP (for standard queries) and TCP (for zone transfers or responses exceeding 512 bytes). RDP uses port 3389, QoS is a traffic prioritization mechanism not tied to a specific port, and DHCP uses ports 67 and 68.
Topics
#DNS#port 53#protocol ports
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