F5 Networks 301a Exam - Topic 2 Question 105 Discussion

Actual exam question for F5 Networks's 301a exam

Question #: 105
Topic #: 2

A BIG IP system load balances connections to a web application. A TCP-based Denial of Service attack against the web application is occurring, which has caused very high memory utilization on the LTM device due to stale TCP connections.

Which TCP profile option should be used to reduce memory utilization?

AIdle timeout

BReset on timeout

CSlow Start

DMultipath TCP

Show Suggested Answer

Suggested Answer: C

by Jerry at Jan 10, 2025, 07:04 PM

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Eura

6 months ago

I’m surprised this is even a question, it’s pretty basic stuff!

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Reita

6 months ago

Reset on timeout (B) could also help, but A seems more effective.

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Alesia

7 months ago

Wait, are we sure about that? What if D is better for handling loads?

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Virgina

7 months ago

Totally agree, it helps clear out those stale connections!

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Flo

7 months ago

I think option A, Idle timeout, is the way to go.

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Jacquline

7 months ago

Multipath TCP seems off-topic here; I don’t think it would help with the memory issue caused by the DoS attack.

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Cyril

8 months ago

I’m a bit confused about Slow Start. I don’t recall it being related to memory utilization, but maybe it has some indirect effect?

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Brynn

8 months ago

I remember practicing a question like this, and I think Reset on timeout was mentioned as a way to manage stale connections effectively.

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Shakira

8 months ago

I think the Idle timeout option might help clear out those stale connections, but I'm not entirely sure if it's the best choice for this situation.

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Linn

8 months ago

Ah, I see. This is all about managing those TCP connections and keeping the memory usage under control. I think I'd go with the Idle timeout option - that should help clear out the stale connections and free up that memory.

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Valentine

8 months ago

Okay, let's think this through. If the issue is high memory usage due to stale connections, then I'd guess the answer is probably related to the connection timeout settings. Idle timeout sounds like the most likely option to help.

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Tabetha

8 months ago

Hmm, I'm a bit unsure about this one. I know the TCP profile options can get tricky, but I think the key is to look for something that can help clear out those stale connections efficiently.

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Erick

8 months ago

This seems like a straightforward TCP optimization question. I'd focus on options that can help reduce the memory utilization caused by the stale TCP connections.

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Latricia

1 year ago

I bet the memory utilization is so high because the LTM device is playing Tetris during its downtime. Gotta keep those skills sharp, you know?

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Providencia

1 year ago

D) Multipath TCP

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Eric

1 year ago

C) Slow Start

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Ronald

1 year ago

B) Reset on timeout

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Mohammad

1 year ago

A) Idle timeout

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Doretha

1 year ago

You guys are overthinking this. The answer is clearly A) Idle timeout. Just set a shorter timeout and those stale connections will be cleaned up in no time!

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Ariel

1 year ago

Nah, I'm going with D) Multipath TCP. That way, the connections can be distributed across multiple paths, reducing the memory load on the LTM.

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Garry

1 year ago

User 2: I disagree, I believe D) Multipath TCP would be more effective in distributing the connections.

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Deandrea

1 year ago

User 1: I think A) Idle timeout could help in reducing memory utilization.

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Hildegarde

1 year ago

I'm not so sure about that. Wouldn't C) Slow Start be a better option? It could help reduce the number of connections by gradually increasing the connection rate.

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Reid

1 year ago

I'm not sure, but I think Reset on timeout could also be a good option to consider.

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Dierdre

1 year ago

I agree with Gearldine, setting an idle timeout can help clear stale TCP connections and reduce memory utilization.

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Reid

1 year ago

Hmm, I think the answer is B) Reset on timeout. This option will forcefully close stale TCP connections, which should help reduce memory utilization on the LTM device.

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