Which QoS mechanism maps packets with specific class of service (COS) or Differentiated Services Code Point (DSCP) markings to an egress queue? (Choose one answer)

A. Classification for ingress traffic
B. Queuing for egress traffic
C. Policing for ingress traffic
D. Shaping for egress traffic

Correct Answer: A

Brave-Dump Clients Votes

B 66.67%

A 33.33%

Comments

javaughn Bryan 2025-12-10 20:45:24

Selected Answers: B

B is correct. A is incorrect.

COS and DSCP markings already exist on the packet. The question is asking which QoS mechanism takes those markings and decides which egress queue the packet goes into when it’s leaving the interface. That is literally what egress queuing does.

Why A is incorrect: Classification just identifies traffic on the way in. It can read COS/DSCP, but it doesn’t map packets to egress queues.

PAGES: 266-268 clarifies this in more detail, (can't fit all of that text here) | FORTISWITCH 7.6 ADMIN GUIDE

Brave-Dumps.com Admin 2025-12-16 15:35:32
I think A is the correct one, please check Fortiswitch 7.2 Study guide page 279

javaughn Bryan 2025-12-16 20:42:03

Selected Answers: A

Thank you Brave-Dumps Admin, you are correct.

B is incorrect because queuing does not decide which egress queue a packet is placed into. Queuing only controls how packets are serviced after they are already in a queue, such as priority, scheduling, and dropping during congestion.

A is correct because classification is the mechanism that reads existing CoS or DSCP markings on ingress traffic and maps those packets to a specific egress queue. The image explicitly states that FortiSwitch classifies packets by mapping CoS or DSCP markings to an egress queue, while queuing happens later when packets are leaving the port.

Page: 279 | FORTISWITCH 7.2 GUIDE

Francisco Javier Delgado Ibarr 2026-04-29 01:44:28

Selected Answers: B

Queuing is the process of placing packets into specific buffers (egress queues) based on their priority markings—such as CoS (Layer 2) or DSCP (Layer 3). This ensures that high-priority traffic is prioritized for transmission.
Classification (Option A) identifies and marks the traffic but doesn't handle the physical mapping to egress buffers.
Policing (Option C) and Shaping (Option D) are rate-limiting mechanisms used to control bandwidth consumption rather than the initial mapping to queues.