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Exam 312-50v12 topic 1 question 206 discussion

Actual exam question from ECCouncil's 312-50v12

Question #: 206
Topic #: 1

An ethical hacker is performing a network scan to evaluate the security of a company's IT infrastructure. During the scan, he discovers an active host with multiple open ports running various services. The hacker uses TCP communication flags to establish a connection with the host and starts communicating with it. He sends a SYN packet to a port on the host and receives a SYN/ACK packet back. He then sends an ACK packet for the received SYN/ACK packet, which triggers an open connection. Which of the following actions should the ethical hacker perform next?

A. Send a PSH packet to inform the receiving application about the buffered data.
B. Conduct a vulnerability scan on the open port to identify any potential weaknesses.
C. Scan another port on the same host using the SYN, ACK, and RST flags.
D. Send a FIN or RST packet to close the connection.

Show Suggested Answer

Suggested Answer: B 🗳️

by DarioReymag at Feb. 6, 2024, 10:38 p.m.

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e020fdc

2 months, 4 weeks ago

Selected Answer: B

You're hired to assess the security of the network. If you've already connected to the port, have a look at what vulnerabilities are there. Scanning for them doesn't mean you'll exploit what you find. Gather notes on whatever is there and move on.

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agelbahri

5 months, 1 week ago

Selected Answer: B

B. Conduct a vulnerability scan on the open port to identify any potential weaknesses

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KalingaDev

8 months ago

Selected Answer: B

Since this is an ethical hacking operation, the hacker should proceed with scanning for vulns. for those who chose 'D', this would be making since if this operation is being conducted illegally.

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blehbleh

8 months, 3 weeks ago

Selected Answer: B

I'm pretty sure this is B as an ethical hacker you need to see if there are any vulnerabilities. You can't just tell them at the end of the pentest that they had open ports but without and validation as to if it is a security concern or not. You would not be doing your job as the pentester. You would just be scanning a network without any knowledge of if anything is vulnerable or not.

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azdan

11 months, 2 weeks ago

Selected Answer: D

Keyword is the ethical hacker perform next.

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kevin403

1 year ago

Selected Answer: D

Key sentence “ An ethical hacker is performing a network scan to evaluate the security of a company's IT infrastructure” his role here didn’t mention anything about scanning for vuln nor having permission to do so. Hence he RST and move on. Ethical hacking is all about getting the permission from the owner to do a specific task, in this case. Network scan only

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GK2205

1 year ago

Selected Answer: D

Another one that is tricky because of nuance: The Ethical Hacker is performing a network scan and not necessarily a vulnerability scan. Network scans do not travers into vulnerability scans although if required we would do so. The context of the question is key here IMHO. One thing is very clear throughout the program, as a CEH your job is to do no harm and not to compromise. i.e. When you gain access to a sensitive database you are to report on it, not enter and potentially exploit it. Similarly here, your scope is a network scan, not a vulnerability scan. So RST and move on.

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Truth_Seeker

1 year, 1 month ago

I think the correct answer is D it is a common practice across various network scanning tools to ensure that connections are properly managed and closed. Therefore, the conclusion about closing connections with a FIN or RST packet after a scan is applicable to most network scanners, not just Nmap

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MustafaDDD

1 year, 5 months ago

Selected Answer: B

I am just thinking, the question says, "An ethical hacker is performing a network scan to evaluate the security of a company's IT infrastructure", why would the hacker close the session?

upvoted 3 times

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