In one of the pairs of protocols given below, both the protocols can use multiple TCP connections between the same client and the server. Which one is that?

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Solution

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Official answer: A) HTTP, FTP

DNS and HTTP

FTP (File Transfer Protocol): FTP natively uses two concurrent TCP connections between the same client and server: a control connection (typically port 21) for issuing commands, and a separate data connection (port 20 or an ephemeral port) for transferring files.
HTTP (Hypertext Transfer Protocol): Web clients (such as web browsers) can open multiple parallel TCP connections to the same server to fetch multiple embedded web resources simultaneously.
Other listed protocols (TELNET, SMTP) use a single TCP connection per session.

Thus, both HTTP and FTP can use multiple TCP connections between the same client and server.

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This DNS and HTTP previous year question is Q17 of the GATE CSE 2015 Set 1 paper. Find more GATE CSE PYQs on DNS and HTTP in Computer Networks, or browse all GATE CSE PYQs.

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DNS and HTTP has 18 GATE CSE PYQs across 15 papers from 2011 to 2026. 13 of them are 1-mark MCQs like this one, and GATE CSE 2015 Set 1 has 2.

Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.