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ECCouncil Certified Ethical Hacker Exam (CEHv13) Sample Questions (Q529-Q534):

NEW QUESTION # 529
Which DNS resource record can indicate how long any "DNS poisoning" could last?

A. TIMEOUT
B. SOA
C. MX
D. NS

Answer: B

NEW QUESTION # 530
From the following table, identify the wrong answer in terms of Range (ft).
Standard
Range (ft)
802.11a
150-150
802.11b
150-150
802.11g
150-150
802.16 (WiMax)
30 miles

A. 802.16 (WiMax)
B. 802.11g
C. 802.11a
D. 802.11b

Answer: C

Explanation:
In CEH v13 Module 11: Hacking Wireless Networks, wireless standards and their transmission ranges are discussed.
Actual Range Specs:
802.11a: Operates at 5 GHz, range up to ~75 ft indoors, much less than 150 ft due to poor wall penetration.
802.11b/g: Operate at 2.4 GHz, typically 150-300 ft indoors.
802.16 (WiMax): Wireless MAN technology with range up to 30 miles - correct for point-to-point outdoor line of sight.
Conclusion:
802.11a listed as 150-150 ft is incorrect.
Realistic effective range is up to 75 ft indoors, depending on obstructions and interference.
This overestimation makes Option D the wrong one.
Reference:
Module 11 - Wireless Protocols and Specifications
IEEE Wireless Standards Summary Table (CEH Appendix)
CEH iLabs: Analyzing Signal Strength of 802.11a/b/g/n Networks

NEW QUESTION # 531
In order to tailor your tests during a web-application scan, you decide to determine which web-server version is hosting the application. On using the sV flag with Nmap. you obtain the following response:
80/tcp open http-proxy Apache Server 7.1.6
what Information-gathering technique does this best describe?

A. Brute forcing
B. Dictionary attack
C. Banner grabbing
D. WhOiS lookup

Answer: C

Explanation:
Banner grabbing is a technique wont to gain info about a computer system on a network and the services running on its open ports. administrators will use this to take inventory of the systems and services on their network. However, an to find will use banner grabbing so as to search out network hosts that are running versions of applications and operating systems with known exploits.
Some samples of service ports used for banner grabbing are those used by Hyper Text Transfer Protocol (HTTP), File Transfer Protocol (FTP), and Simple Mail Transfer Protocol (SMTP); ports 80, 21, and 25 severally. Tools normally used to perform banner grabbing are Telnet, nmap and Netcat.
For example, one may establish a connection to a target internet server using Netcat, then send an HTTP request. The response can usually contain info about the service running on the host:

This information may be used by an administrator to catalog this system, or by an intruder to narrow down a list of applicable exploits.
To prevent this, network administrators should restrict access to services on their networks and shut down unused or unnecessary services running on network hosts. Shodan is a search engine for banners grabbed from portscanning the Internet.

NEW QUESTION # 532
Stephen, an attacker, targeted the industrial control systems of an organization. He generated a fraudulent email with a malicious attachment and sent it to employees of the target organization. An employee who manages the sales software of the operational plant opened the fraudulent email and clicked on the malicious attachment. This resulted in the malicious attachment being downloaded and malware being injected into the sales software maintained in the victim's system. Further, the malware propagated itself to other networked systems, finally damaging the industrial automation components.
What is the attack technique used by Stephen to damage the industrial systems?

A. Spear-phishing attack
B. Reconnaissance attack
C. SMiShing attack
D. HMI-based attack

Answer: A

Explanation:
In CEH v13 Module 09: Social Engineering, spear-phishing is described as a targeted email-based attack in which malicious actors craft highly personalized emails to specific individuals within an organization.
Characteristics from the scenario:
The attacker sends a fraudulent email to an employee.
The email contains a malicious attachment.
Once opened, malware is installed, targeting ICS/SCADA components.
The attack spreads and ultimately damages industrial systems.
This is a classic spear-phishing attack used as the initial infection vector in Advanced Persistent Threats (APT) targeting industrial control systems.
Why Others Are Incorrect:
B). SMiShing: SMS-based phishing; not email-related.
C). Reconnaissance: Pre-attack information gathering, not execution.
D). HMI-based attack: Targets Human-Machine Interface devices, but that's not how the attack started here.
Reference:
Module 09 - Social Engineering # Spear Phishing in Critical Infrastructure CEH iLabs: ICS Infection via Spear Phishing Simulation

NEW QUESTION # 533
The security administrator of ABC needs to permit Internet traffic in the host 10.0.0.2 and UDP traffic in the host
10.0.0.3. He also needs to permit all FTP traffic to the rest of the network and deny all other traffic. After he applied his ACL configuration in the router, nobody can access the ftp, and the permitted hosts cannot access the Internet. According to the next configuration, what is happening in the network?
access-list 102 deny tcp any any
access-list 104 permit udp host 10.0.0.3 any
access-list 110 permit tcp host 10.0.0.2 eq www any
access-list 108 permit tcp any eq ftp any

A. The ACL 104 needs to be first because is UDP
B. The ACL for FTP must be before the ACL 110
C. The first ACL is denying all TCP traffic and the other ACLs are being ignored by the router
D. The ACL 110 needs to be changed to port 80

Answer: C

Explanation:
https://www.cisco.com/c/en/us/support/docs/ip/access-lists/26448-ACLsamples.html Since the first line prohibits any TCP traffic (access-list 102 deny tcp any any), the lines below will simply be ignored by the router. Below you will find the example from CISCO documentation.
This figure shows that FTP (TCP, port 21) and FTP data (port 20) traffic sourced from NetB destined to NetA is denied, while all other IP traffic is permitted.
Diagram Description automatically generated

FTP uses port 21 and port 20. TCP traffic destined to port 21 and port 20 is denied and everything else is explicitly permitted.
* access-list 102 deny tcp any any eq ftp
* access-list 102 deny tcp any any eq ftp-data
* access-list 102 permit ip any any

NEW QUESTION # 534
......

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