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Cisco 200-201 Exam - Topic 4 Question 87 Discussion

A user reports difficulties accessing certain external web pages. When an engineer examines traffic to and from the external domain in full packet captures, they notice that many SYNs have the same sequence number, source, and destination IP address, but they have different payloads. What is causing this situation?
A) TCP injection
B) misconfiguration of a web filter
C) Failure of the full packet capture solution
D) insufficient network resources

Cisco 200-201 Exam - Topic 4 Question 87 Discussion

Actual exam question for Cisco's 200-201 exam
Question #: 87
Topic #: 4
[All 200-201 Questions]

A user reports difficulties accessing certain external web pages. When an engineer examines traffic to and from the external domain in full packet captures, they notice that many SYNs have the same sequence number, source, and destination IP address, but they have different payloads. What is causing this situation?

Show Suggested Answer Hide Answer
Suggested Answer: A

TCP injection is an attack where the attacker sends crafted packets into an existing TCP session. These packets appear to be part of the session.

The presence of many SYN packets with the same sequence number, source, and destination IP but different payloads indicates that an attacker might be injecting packets into the session.

This method can be used to disrupt communication, inject malicious commands, or manipulate the data being transmitted.


Understanding TCP Injection Attacks

Analyzing Packet Captures for Injection Attacks

Network Security Monitoring Techniques

by Cassi at May 20, 2024, 06:29 PM

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Paris
9 months ago
Wait, could it really be TCP injection? That seems odd.
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Andrew
9 months ago
I agree, the sequence numbers are a big clue!
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Krissy
10 months ago
Definitely not a failure of the packet capture solution.
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Beatriz
10 months ago
I think it’s more likely a misconfiguration of a web filter.
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Amber
10 months ago
Sounds like TCP injection to me.
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Coral
10 months ago
I wonder if the full packet capture solution could be failing. I feel like I've seen a question about that before, but I can't recall the details.
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Tiera
11 months ago
I think a misconfiguration of a web filter could cause issues like this, but I'm not entirely confident.
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Johna
11 months ago
This kind of situation reminds me of a practice question about TCP injection. Could that be what's happening here?
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Felix
11 months ago
I remember something about SYN packets being related to connection attempts, but I'm not sure how that ties into the sequence numbers being the same.
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Lizette
11 months ago
Okay, the key clue seems to be the different payloads. That points to some kind of injection or tampering, so I'm going to go with option A.
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Slyvia
11 months ago
I'm a bit confused by the details here. I'll need to review my networking knowledge to figure out what could be going on.
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Keena
11 months ago
Hmm, the sequence numbers being the same but the payloads different is really interesting. I'm leaning towards TCP injection as the cause.
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Paris
11 months ago
This sounds like a tricky one. I'll need to think through the different possibilities carefully.
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Annett
11 months ago
Okta is encouraging us to move away from IWA, so the first statement must be true. I'll go with option A.
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Hyman
11 months ago
Hmm, I'm a bit unsure about this one. The question is asking for a specific encryption technique, but I'm not totally familiar with the differences between IDEA, DES, and AES. I'll have to think this through carefully.
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Tomas
11 months ago
I'm pretty sure penetration pricing involves setting a low price to gain market share, so option C seems like the best choice here. I feel good about this one.
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Claudia
11 months ago
Okay, I've got a strategy for this. I'll focus on the advantages of private blockchains, like the ability to limit access and potentially reduce costs. That should help me identify the best answer.
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Earnestine
11 months ago
This question feels familiar, like we practiced something similar in class. I'm leaning towards "actuary / underwriter" as the correct choice.
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Herschel
2 years ago
Oh great, now the hackers are getting creative with their payload variation. I feel for the engineer trying to sort this mess out. TCP injection for the win!
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Lonna
2 years ago
The engineer has their work cut out for them trying to figure this out.
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Thersa
2 years ago
The engineer has their work cut out for them trying to figure this out.
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Francoise
2 years ago
Yeah, those hackers are really stepping up their game.
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Sanda
2 years ago
Yeah, those hackers are really stepping up their game.
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Ashlyn
2 years ago
This looks like a case of TCP injection.
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Ivette
2 years ago
This looks like a case of TCP injection.
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Lili
2 years ago
I bet the network admin is wondering if they should have invested in a better packet capture solution. But hey, at least they're getting some excitement in their day. A is the way to go.
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Margo
2 years ago
Insufficient network resources? Come on, this is clearly a security issue. TCP injection all the way, folks.
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Adelina
2 years ago
Hmm, the varying payloads make me think it's not a misconfigured web filter. Gotta be some kind of malicious activity going on. A for sure.
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Bulah
2 years ago
Yeah, I think so too. It's probably some kind of malicious activity going on.
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Leonida
2 years ago
I agree, the varying payloads seem suspicious. Definitely sounds like TCP injection.
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Isadora
2 years ago
Definitely, it's probably TCP injection causing the issue.
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Kanisha
2 years ago
I think we should investigate further to confirm if it's a TCP injection.
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Marleen
2 years ago
Yeah, the same sequence number and different payloads definitely point to malicious activity.
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Candida
2 years ago
I agree, those varying payloads seem suspicious.
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Antonio
2 years ago
I agree, it seems like some kind of TCP injection is happening.
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Amie
2 years ago
This sounds like a classic TCP injection attack. The different payloads suggest the attacker is trying to bypass security measures. I'd go with option A.
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Twana
2 years ago
Maybe the web filter is misconfigured and allowing these packets through. Option B could also be a possibility.
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Ben
2 years ago
Yes, option A makes the most sense in this situation.
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Deonna
2 years ago
I agree, it does seem like a TCP injection attack. Option A is the most likely cause.
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Ashlee
2 years ago
I agree, it does seem like a TCP injection attack.
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