Cisco Exam 300-420 Topic 7 Question 103 Discussion

Actual exam question for Cisco's 300-420 exam

Question #: 103
Topic #: 7

Since installing a cisco TelePresence system, the company is experiencing other application having response issues when the system in use. As a result, the company asked an architect to recommend a QoS solution. The customer is currently using a CBWFQ policy to manage traffic on an internet connection with a speed of 100 Mbps. Which link-capacity limit must the architect choose for strict-priority for the real-time traffic?

A25 Mbps

B50 Mbps

C33 Mbps

D75 Mbps

Show Suggested Answer

Suggested Answer: C

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_conmgt/configuration/xe-3s/qos-conmgt-xe-3s-book/qos-conmgt-oview.html#GUID-48F6AF58-5CCC-44A0-B868-125AE453FF2A%20%20%20%20%20%20(75%20Mbps)

The sum of all bandwidth allocation on an interface cannot exceed 75 percent of the total available interface bandwidth. The remaining 25 percent is used for other overhead, including Layer 2 overhead, routing traffic, and best-effort traffic. Bandwidth for the CBWFQ class-default class, for instance, is taken from the remaining 25 percent.

by Cecily at Nov 16, 2024, 07:27 PM

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Hana

6 months ago

I'm just going to close my eyes and point to an answer. That's how I passed the last one, right? *chuckles* Oh, wait, this is a serious exam. Hmm, I'll go with B) 50 Mbps.

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Francine

5 months ago

User 4: I'm going to stick with the original choice and say B) 50 Mbps.

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Justine

5 months ago

User 3: I believe it's D) 75 Mbps.

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Laurel

5 months ago

User 2: I'm not sure about that. I would go with C) 33 Mbps.

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Marci

6 months ago

User 1: I think the answer is A) 25 Mbps.

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Goldie

6 months ago

Hmm, that makes sense. I see your point now.

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Rosina

6 months ago

Wait, are we sure the question isn't a trick? What if the answer is actually E) All of the above? Just kidding, but you never know with these certification exams.

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Penney

7 months ago

I disagree, I believe the answer is D) 75 Mbps because it should be higher to prioritize real-time traffic.

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Tyra

7 months ago

This is a tough one. I'm going to have to go with B) 50 Mbps. Anything higher might be overkill, and anything lower could cause issues for the real-time traffic.

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Katheryn

7 months ago

D) 75 Mbps? That's a bit too much, isn't it? I'd go with A) 25 Mbps to be on the safe side.

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Katlyn

5 months ago

D) Yeah, 75 Mbps does seem high. A) 25 Mbps is a safer option.

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Alesia

5 months ago

C) 33 Mbps might be pushing it, better to stick with the lower limit.

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Jodi

6 months ago

Yeah, it's always better to err on the side of caution when it comes to QoS solutions.

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Desire

6 months ago

I agree, it's better to be conservative with the link-capacity limit.

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Bettye

6 months ago

B) I agree, it's better to be safe and prioritize the real-time traffic.

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Hester

6 months ago

I think A) 25 Mbps is a safer choice for strict-priority traffic.

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Kristofer

6 months ago

A) 25 Mbps sounds like a good choice for strict-priority traffic.

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Goldie

7 months ago

I think the answer is A) 25 Mbps because it should be less than the total link capacity.

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Oliva

7 months ago

Hmm, I'm not sure. C) 33 Mbps seems like a reasonable compromise between giving the real-time traffic priority and leaving enough bandwidth for other applications.

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Dona

6 months ago

D) 75 Mbps might be too high for the real-time traffic.

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Barrett

6 months ago

C) 33 Mbps could be a good balance for the real-time traffic and other applications.

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Lura

7 months ago

B) 50 Mbps might be too much bandwidth for the real-time traffic.

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Serita

7 months ago

A) 25 Mbps would be too low for the real-time traffic.

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Danilo

7 months ago

I think the answer is B) 50 Mbps. The strict-priority queue should be limited to about half the total bandwidth to ensure that other traffic is not starved.

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