ACtE08 · Chapter 8Demo2 · Set 2🏛️ Past Licensure QuestionID: 83134023
Which of the following network applications is the MOST time-critical (highly sensitive to packet delay, jitter, and latency)?
Which of the following network applications is the MOST time-critical (highly sensitive to packet delay, jitter, and latency)?
Multiple Choice Options
- A
Email (SMTP)
- B
File Transfer (FTP)
- C✓ Correct Option
Internet Telephony (VoIP)
- D
All are equally time-critical
Detailed Technical Solution & Explanation
Network applications exhibit vastly different Quality of Service (QoS) requirements:
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Internet Telephony (VoIP / Real-time Audio): Strictly time-critical. Human speech perception degrades rapidly if one-way latency exceeds 150 ms or if packet jitter is high. Delayed voice packets that arrive out-of-order are unusable and discarded.
•
Email and File Transfer (FTP): Elastic services that are delay-tolerant. A delay of several seconds or minutes causes no degradation to the integrity of an email or downloaded file.
Option Analysis:
•
Option A (Email (SMTP)): Incorrect; store-and-forward, delay-tolerant application.
•
Option B (File Transfer (FTP)): Incorrect; requires data losslessness but tolerates variable latency.
•
Option C (Internet Telephony (VoIP)): Correct; real-time conversational voice communication is strictly delay and jitter sensitive.
•
Option D (All are equally time-critical): Incorrect; elasticity varies fundamentally across protocols.
Reference: Demo2 · Set 2NEC Licensure Syllabus