ITPEC FE Subject A October 2025 Question 23
Which of the following is a mechanism used to prioritize traffic based on its importance and minimize network latency for network applications?
Explanation
QoS (Quality of Service) — the network-level mechanism that classifies traffic and gives the important kinds priority.
QoS marks and queues packets by class, so delay-sensitive traffic such as voice and video is forwarded first and gets reserved bandwidth, while bulk traffic waits. This keeps latency and jitter low for the applications that need it.
Answer (c)
Why not others:
- •(a) AAA — Authentication, Authorization and Accounting controls who may use the network and records usage; it does not rank traffic.
- •(b) PoE — Power over Ethernet supplies electrical power over the LAN cable to devices such as IP phones and cameras.
- •(d) RTP — Real-time Transport Protocol carries audio and video with timestamps and sequence numbers, but it does not prioritize packets; it relies on QoS for that.
Key rule: Prioritizing traffic classes to control latency, jitter and bandwidth is QoS; protocols like RTP only carry the real-time data.
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