(ISC)2
SSCP · Question #1043
Which of the following services relies on UDP?
The correct answer is C. DNS. DNS relies on connectionless UDP whereas services like FTP, Telnet and SMTP rely on TCP.
Submitted by khalil_dz· Apr 18, 2026Network and Communications Security
Question
Which of the following services relies on UDP?
Options
- AFTP
- BTelnet
- CDNS
- DSMTP
How the community answered
(54 responses)- A2% (1)
- B2% (1)
- C93% (50)
- D4% (2)
Explanation
DNS relies on connectionless UDP whereas services like FTP, Telnet and SMTP rely on TCP.
Topics
#UDP#DNS#Network Protocols#Transport Layer
Community Discussion
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