Which congestion queuing method on Cisco IOS based routers uses four static queues?

The correct answer is A. Priority. Priority Queuing (PQ) is correct because it uses exactly four static, predefined queues labeled High, Medium, Normal, and Low, where traffic is always served from the highest priority queue before moving to lower ones. Custom Queuing (B) is incorrect because it supports up to 16

Submitted by tyler.j· Mar 6, 2026Infrastructure

Question

Options

APriority
Bcustom
Cweighted fair
Dlow latency

How the community answered

(27 responses)

A
89% (24)
B
4% (1)
C
4% (1)
D
4% (1)

Explanation

Priority Queuing (PQ) is correct because it uses exactly four static, predefined queues labeled High, Medium, Normal, and Low, where traffic is always served from the highest priority queue before moving to lower ones. Custom Queuing (B) is incorrect because it supports up to 16 configurable queues, not four static ones, and uses a round-robin scheduling approach. Weighted Fair Queuing (C) is incorrect because it dynamically creates queues based on traffic flows rather than using a fixed number of static queues. Low Latency Queuing (D) is incorrect because it combines a strict priority queue with WFQ and does not use four static queues.

Memory Tip: Think of Priority Queuing as a "4-lane VIP highway" - High, Medium, Normal, and Low - where VIPs (high priority traffic) always go first. The number 4 is fixed and static, just like the four letters in the word "HMNL" (High, Medium, Normal, Low).

Topics

#Congestion Management#Queuing Methods#Cisco IOS QoS#Priority Queuing

Community Discussion

No community discussion yet for this question.

Full 350-401 Practice