Selected Answer: D Priority Queuing (PQ)—This kind of queuing puts traffic into one of four queues. Each queue has a different priority level, and higher-priority queues have to be emptied before packets are taken from lower-priority queues. This behavior can “starve out” lower- priority traffic. Reference: https://www.ciscopress.com/articles/article.asp?p=352991&seqNum=7#:~:text=Priority%20Queuing%20(PQ)%E2%80%94This%20type%20of%20queuing%20places%20traffic%20into%20one%20of%20four%20queues.%20Each%20queue%20has%20a%20different%20level%20of%20priority%2C%20and%20higher%2Dpriority%20queues%20must%20be%20emptied%20before%20packets%20are%20emptied%20from%20lower%2Dpriority%20queues.%20This%20behavior%20can%20%E2%80%9Cstarve%20out%E2%80%9D%20lower%2D%20priority%20traffic.

Selected Answer: D https://packetlife.net/media/library/19/QoS.pdf

Correctomundo

Keyword is "four" queues: Priority Queuing. The Cisco CG-OS router supports four priority queue settings for QoS, indexes 1 to 4, where 1 is the highest priority and 4 is the lowest.

Selected Answer: A "Which . . . uses four static queues?" Correct is A) Weighted Fair Queuing (also CBWFQ) B) maybe. . .if you're customizing the queueing sure, but there is usually a name tied to your queueing method. C) Same As PQ -- only 1, max 2 PQ or LLQ available, not four static queues. D) A PQ only uses ONE queue out of the four, except a few special platforms which have two priority queues (but they are not called static queues). I've never even heard of hardware that would let all four queues be "PQ". That would defeat the purpose of a PQ.

Thanks for sharing this

Selected Answer: B Custom Queuing (CQ) → Uses 4 static queues (actually up to 16 queues in total, but by default 4 are defined). Traffic is put into queues based on defined policies, and packets are served in a round-robin fashion.

Selected Answer: D Class-Based Weighted Fair Queuing (CBWFQ) with Low Latency Queuing (LLQ)

It's priority, actually

Selected Answer: D In Cisco networking, the queuing method that specifically uses four static queues is Priority Queuing (PQ). Key Characteristics of Priority Queuing (PQ) Queue Structure: It sorts traffic into exactly four predefined, static queues according to priority level: High, Medium, Normal, and Low.