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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?
Suggested Answer: C
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31 comments · newest first
EU
Eura
11 months ago
I’m surprised this is even a question, it’s pretty basic stuff!
RE
Reita
11 months ago
Reset on timeout (B) could also help, but A seems more effective.
AL
Alesia
11 months ago
Wait, are we sure about that? What if D is better for handling loads?
VI
Virgina
12 months ago
Totally agree, it helps clear out those stale connections!
FL
Flo
12 months ago
I think option A, Idle timeout, is the way to go.
JA
Jacquline
12 months ago
Multipath TCP seems off-topic here; I don’t think it would help with the memory issue caused by the DoS attack.
CY
Cyril
1 year 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?
BR
Brynn
1 year ago
I remember practicing a question like this, and I think Reset on timeout was mentioned as a way to manage stale connections effectively.
SH
Shakira
1 year 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.
LI
Linn
1 year 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.
VA
Valentine
1 year 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.
TA
Tabetha
1 year 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.
ER
Erick
1 year 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.
LA
Latricia
2 years 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?
PR
Providencia
1 year ago
D) Multipath TCP
ER
Eric
1 year ago
C) Slow Start
RO
Ronald
1 year ago
B) Reset on timeout
MO
Mohammad
1 year ago
A) Idle timeout
DO
Doretha
2 years 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!
AR
Ariel
2 years 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.
GA
Garry
1 year ago
User 2: I disagree, I believe D) Multipath TCP would be more effective in distributing the connections.
DE
Deandrea
1 year ago
User 1: I think A) Idle timeout could help in reducing memory utilization.
HI
Hildegarde
2 years 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.
RE
Reid
2 years ago
I'm not sure, but I think Reset on timeout could also be a good option to consider.
DI
Dierdre
2 years ago
I agree with Gearldine, setting an idle timeout can help clear stale TCP connections and reduce memory utilization.
RE
Reid
2 years 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.
GI
Gilberto
1 year ago
I don't think that would be as effective in this situation.
LA
Lai
1 year ago
But what about option A) Idle timeout?
SH
Shawnda
1 year ago
That makes sense, it will help close those stale connections.
DO
Donette
1 year ago
I think the answer is B) Reset on timeout.
GE
Gearldine
2 years ago
I think the answer is A) Idle timeout.