Systems Security Certified Practitioner – SSCP – Question1013

Which of the following services relies on UDP?

A. FTP
B. Telnet
C. DNS
D. SMTP

Correct Answer: C

Explanation:

DNS relies on connectionless UDP whereas services like FTP, Telnet and SMTP rely on TCP.
Source: ROTHKE, Ben, CISSP CBK Review presentation on domain 2, August 1999.