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312-50v13 Premium Exam Questions

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Total 693 questions

Certified Ethical Hacker Exam (CEHv13) Questions and Answers

Question 129

While conducting a covert penetration test on a UNIX-based infrastructure, the tester decides to bypass intrusion detection systems by sending specially crafted TCP packets with an unusual set of flags enabled. These packets do not initiate or complete any TCP handshake. During the scan, the tester notices that when certain ports are probed, there is no response from the target, but for others, a TCP RST (reset) packet is received. The tester notes that this behavior consistently aligns with open and closed ports. Based on these observations, which scanning technique is most likely being used?

Options:

A.

ACK flag scan to evaluate firewall behavior

B.

TCP Connect scan to complete the three-way handshake

C.

Xmas scan leveraging RFC 793 quirks

D.

FIN scan using stealthy flag combinations

Question 130

If executives are found liable for not properly protecting their company’s assets and information systems, what type of law would apply in this situation?

Options:

A.

Criminal

B.

International

C.

Common

D.

Civil

Question 131

During a security audit, a penetration tester observes abnormal redirection of all traffic for a financial institution’s primary domain. Users are being redirected to a phishing clone of the website. Investigation shows the authoritative DNS server was compromised and its zone records modified to point to the attacker’s server. This demonstrates total manipulation of domain-level resolution, not cache poisoning or client-side attacks. Which technique is being used in this scenario?

Options:

A.

Establish covert communication using DNS tunneling over standard DNS queries

B.

Perform DNS rebinding to manipulate browser-origin interactions

C.

Carry out DNS server hijacking by tampering with the legitimate name-resolution infrastructure

D.

Initiate a DNS amplification attack using recursive servers

Question 132

A financial services firm is experiencing a sophisticated DoS attack on their DNS servers using DNS amplification and on their web servers using HTTP floods. Traditional firewall rules and IDS are failing to mitigate the attack effectively. To protect their infrastructure without impacting legitimate users, which advanced mitigation strategy should the firm implement?

Options:

A.

Increase server capacity and implement simple rate limiting

B.

Block all incoming traffic from suspicious IP ranges using access control lists

C.

Deploy a Web Application Firewall (WAF) to filter HTTP traffic

D.

Utilize a cloud-based DDoS protection service with traffic scrubbing capabilities

Page: 33 / 51
Total 693 questions