Exam 200-301 topic 1 question 544 discussion

answer should be LLQ Low Latency Queueing

Some questions are tricky. They ask for prioritization method not queueing method, thus it leaves us with round-robin and expedited-forwarding. So correct answer is expedited forwarding.

EF and LLQ are complementary. EF defines the priority level for the traffic, while LLQ enforces that priority. The question wording is critical: If it asks for a prioritization method, the answer should be D. Expedited Forwarding. If it asks for the mechanism used to schedule traffic, the answer is C. Low-Latency Queuing. Seems like everyone thinks the answer is C but I think it is D

C is correct LLQ allows delay-sensitive data (such as voice) to be given preferential treatment over other traffic by letting the data to be dequeued and sent first.

This question is tricky: you use the mechanism low-latency queuing for scheduling the high priority traffic, but it is not a priorization method. So, the answer is D

On the test I would put down LLQ. I see evidence for LLQ but I don't see why expedited forwarding is wrong. Can someone explain what I'm missing? Expedited Forwarding (EF) This code is applied to packets that require low latency and low packet loss. For example, voice traffic would use EF and note that IP phones mark their VoIP packets with EF by default. -All in One CCT/CCNA Routing and Switching

On the test I would put down LLQ. I see evidence for LLQ but I don't see why expedited forwarding is wrong. Can someone explain what I'm missing?

Low-latency queuing (LLQ) is a congestion management technique that provides strict priority queuing for voice and video traffic, allowing these applications to be processed with minimal delay and jitter. LLQ is designed to ensure that voice and video traffic is sent through the network as quickly as possible, while still allowing other types of traffic to be transmitted when there is available bandwidth.

I generally go by the OCG and it makes clear that LLQ is for prioritization--see page 243 of Vol. 2

9tut.com shows the correct answer as Low Latency Queueing

C is certainly correct here.

Queuing Low Latency Queuing (LLQ) is the preferred queuing policy for VoIP audio. Given the stringent delay/jitter sensitive requirements of TP and the need to synchronize audio and video for CUVA, priority (LLQ) queuing is the recommended for all video traffic as well. Note that, for video, priority bandwidth is generally fudged up by 20% to account for the overhead.

correct answer is LOWER-LATENCY QUEUEING.

easy easy easy

the right answer is C

so good answer

answer should be c. low latency queueing