F5 Networks 301b Exam - Topic 2 Question 119 Discussion

Actual exam question for F5 Networks's 301b exam

Question #: 119
Topic #: 2

-- Exhibit --

Refer to the exhibit.

A company uses a complex piece of client software that connects to one or more virtual servers (VS) hosted on an LTM device. The client software is experiencing issues. An LTM Specialist must determine the cause of the problem.

The LTM Specialist is seeing a client source IP of 168.210.232.5 in the tcpdump. However, the client source IP is actually 10.123.17.12.

Why does the IP address of 10.123.17.12 fail to appear in the tcpdump?

AThe LTM device performed NAT on the individual's IP address.

BThe Secure Network Address Translation (SNAT) pool on the virtual server is activated.

CNetwork Address Translation (NAT) has occurred in the path between the client and the LTM device.

DThe individual's data stream is being routed to the LTM device by a means other than the default route.

Show Suggested Answer

Suggested Answer: C

by Pamella at Nov 25, 2025, 12:40 PM

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Sage

11 days ago

I agree with Heidy. NAT is usually the culprit.

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Vicente

16 days ago

D is interesting, but I doubt it's the main cause here.

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Ammie

21 days ago

C seems likely too. NAT in the path is a common problem.

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Antione

27 days ago

I lean towards B. The SNAT pool could be the issue.

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Jeffrey

1 month ago

This question is tricky! NAT can really confuse things.

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Talia

1 month ago

Not so sure about that, could be something else going on.

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Glen

2 months ago

Totally agree, it's gotta be NAT at play.

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Haydee

2 months ago

Wait, how can the source IP change like that?

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Nan

2 months ago

Definitely a SNAT issue here.

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Chandra

2 months ago

I bet the LTM Specialist is scratching their head, wondering where that pesky 10.123.17.12 went.

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Talia

3 months ago

D) The individual's data stream is being routed to the LTM device by a means other than the default route.

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Geraldine

3 months ago

Ah, the joys of network troubleshooting! Where IP addresses disappear like magic.

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Olive

3 months ago

C) Network Address Translation (NAT) has occurred in the path between the client and the LTM device.

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Hubert

3 months ago

B) The Secure Network Address Translation (SNAT) pool on the virtual server is activated.

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Mattie

3 months ago

I think the default route routing could be a factor, but I don't remember how that ties into the IP address issue. It's a bit confusing!

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Louis

3 months ago

This seems like a tricky networking question, but I think I can work through it. I'll need to draw on my understanding of how LTM devices and NAT can impact network traffic visibility.

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Josphine

4 months ago

I'm feeling pretty confident about this one. The exhibit and the question provide a lot of useful information to narrow down the correct answer. I'll carefully consider each option and use the process of elimination.

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Carey

4 months ago

Okay, let's think this through step-by-step. The key is to identify where the NAT is occurring and how that would affect the visible IP address in the tcpdump. I think I have a strategy to approach this.

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Margot

4 months ago

This seems similar to a practice question we did on SNAT pools. I think option B might be the right answer, but I could be wrong.

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Wade

4 months ago

Looks like NAT is messing with the IP visibility.

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Brittni

4 months ago

I remember something about NAT affecting IP visibility, but I'm not sure if it's specifically the LTM device doing it.

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Heidy

5 months ago

I think it's A. NAT on the IP makes sense.

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Marjory

5 months ago

I feel like NAT could happen anywhere in the network path, so option C might be a possibility too. I just can't recall the specifics.

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Valentin

5 months ago

I'm a bit confused by the question. I'm not sure I fully understand how NAT and SNAT work in this context. I'll need to review those concepts before attempting this.

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