200-301 · Question #1079
Drag and Drop Question Drag and drop the application protocols from the left onto the transport protocols that it uses on the right. Answer:
The correct answer is TCP: HTTP; TCP: SMTP; TCP: Telnet; UDP: DNS; UDP: RTP; UDP: SNMP. HTTP, SMTP, and Telnet use TCP because they require reliable, ordered, and error-checked delivery of data - TCP's connection-oriented nature ensures no data is lost during web page transfers, email transmission, or terminal sessions. DNS, RTP, and SNMP use UDP because they priori
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Correct arrangement
- TCP: HTTP
- TCP: SMTP
- TCP: Telnet
- UDP: DNS
- UDP: RTP
- UDP: SNMP
Explanation
HTTP, SMTP, and Telnet use TCP because they require reliable, ordered, and error-checked delivery of data - TCP's connection-oriented nature ensures no data is lost during web page transfers, email transmission, or terminal sessions. DNS, RTP, and SNMP use UDP because they prioritize speed and low overhead over guaranteed delivery - DNS queries are small and fast, RTP streams real-time media where retransmission would cause worse problems than lost packets, and SNMP uses lightweight polling that doesn't require connection setup. UDP's connectionless nature makes it ideal when latency matters more than perfect reliability, while TCP's handshake and acknowledgment mechanisms suit applications where data integrity is critical.
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