The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are
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GATE CSE 2013 · Q12
MCQ1 markEasy
Time
The transport layer protocols used for real time multimedia, file transfer, DNS and email, respectively are
Select one answerSingle correct
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Solution
Step-by-step verified solution
Official answer: C) UDP, TCP, UDP and TCP
Switching and Performance MetricsLet's analyze the transport protocol requirements for each application:
Real-time multimedia: Requires low delay and jitter, and can tolerate some packet loss; therefore, it uses UDP.
File transfer (e.g., FTP): Requires reliable data transfer without loss; therefore, it uses TCP.
DNS: Requires quick lookups with low overhead, primarily using UDP (on port 53).
Email (e.g., SMTP): Requires reliable delivery of message data; therefore, it uses TCP.
Thus, the sequence of protocols is UDP, TCP, UDP and TCP, matching option (C).
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Examiner trap
The misconception this question tests
Applications sensitive to delay prefer UDP, while applications requiring reliable, error-free delivery use TCP.
This Switching and Performance Metrics previous year question is Q12 of the GATE CSE 2013 paper. Find more GATE CSE PYQs on Switching and Performance Metrics in Computer Networks, or browse all GATE CSE PYQs.
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Switching and Performance Metrics in GATE CSE
Switching and Performance Metrics has 11 GATE CSE PYQs across 9 papers from 2013 to 2026. 4 of them are 1-mark MCQs like this one, and GATE CSE 2013 has 2.
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Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.