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| Section | Objectives |
|---|---|
| Topic 1: Reconnaissance Techniques | - Scanning networks and enumeration - Footprinting and information gathering |
| Topic 2: System Hacking | - Malware threats and system exploitation - Gaining access and privilege escalation |
| Topic 3: Cloud and IoT Security | - IoT security fundamentals - Cloud computing security concepts |
| Topic 4: Network Attacks | - Denial of Service (DoS/DDoS) - Sniffing and session hijacking |
| Topic 5: Cryptography | - Encryption, hashing, and cryptanalysis |
| Topic 6: Web and Application Security | - Web application hacking techniques |
| Topic 7: Wireless and Mobile Security | - Wireless network attacks - Mobile platform vulnerabilities |
| Topic 8: Introduction to Ethical Hacking | - Ethical hacking concepts and methodology |
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NEW QUESTION # 499
Which scenario best describes a tailgating attack?
Answer: B
Explanation:
Tailgating, as defined in CEH v13 Social Engineering, is a physical social engineering attack where an unauthorized individual gains access by following an authorized person into a restricted area.
The attacker exploits human courtesy rather than technical vulnerabilities. Options B, C, and D describe phishing, pretexting, and baiting respectively.
Thus, option A is the correct representation of tailgating.
NEW QUESTION # 500
You are a cybersecurlty consultant for a smart city project. The project involves deploying a vast network of loT devices for public utilities like traffic control, water supply, and power grid management The city administration is concerned about the possibility of a Distributed Denial of Service (DDoS) attack crippling these critical services. They have asked you for advice on how to prevent such an attack. What would be your primary recommendation?
Answer: C
Explanation:
Implementing regular firmware updates for all IoT devices is the primary recommendation to prevent DDoS attacks on the smart city project. Firmware updates can fix security vulnerabilities, patch bugs, and improve performance of the IoT devices, making them less susceptible to malware infections and botnet recruitment12. Firmware updates can also enable new security features, such as encryption, authentication, and firewall, that can protect the IoT devices from unauthorized access and data theft3. Firmware updates should be done automatically or remotely, without requiring user intervention, to ensure timely and consistent security across the IoT network4.
The other options are not as effective or feasible as firmware updates for the following reasons:
* B. Deploying network intrusion detection systems (IDS) across the IoT network can help detect and alert DDoS attacks, but not prevent them. IDS can monitor network traffic and identify malicious patterns, such as high volume, spoofed IP addresses, or unusual protocols, that indicate a DDoS attack5.
However, IDS cannot block or mitigate the attack, and may even be overwhelmed by the flood of traffic, resulting in false positives or missed alerts. Moreover, deploying IDS across a vast network of IoT devices can be costly, complex, and resource-intensive, as it requires dedicated hardware, software, and personnel.
* C. Establishing strong, unique passwords for each IoT device can prevent unauthorized access and brute-force attacks, but not DDoS attacks. Passwords can protect the IoT devices from being compromised by hackers who try to guess or crack the default or weak credentials. However, passwords cannot prevent DDoS attacks that exploit known or unknown vulnerabilities in the IoT devices, such as buffer overflows, command injections, or protocol flaws. Moreover, establishing and managing strong, unique passwords for each IoT device can be challenging and impractical, as it requires user awareness, memory, and effort.
* D. Implementing IP address whitelisting for all IoT devices can restrict network access and communication to trusted sources, but not DDoS attacks. IP address whitelisting can filter out unwanted or malicious traffic by allowing only the predefined IP addresses to connect to the IoT devices.
However, IP address whitelisting cannot prevent DDoS attacks that use spoofed or legitimate IP addresses, such as reflection or amplification attacks, that bypass the whitelisting rules. Moreover, implementing IP address whitelisting for all IoT devices can be difficult and risky, as it requires constant updating, testing, and monitoring of the whitelist, and may block legitimate or emergency traffic by mistake.
References:
1: How to proactively protect IoT devices from DDoS attacks - Synopsys
2: IoT and DDoS: Cyberattacks on the Rise | A10 Networks
3: Detection and Prevention of DDoS Attacks on the IoT - MDPI
4: How to Secure IoT Devices: 5 Best Practices | IoT For All
5: Intrusion Detection Systems (IDS) Part 1 - Network Security | Coursera
6: DDoS Attacks: Detection and Mitigation - Cisco
7: The Challenges of IoT Security - Infosec Resources
8: IoT Security: How to Protect Connected Devices and the IoT Ecosystem | Kaspersky
9: IoT Security: Common Vulnerabilities and Attacks | IoT For All
10: The Password Problem: How to Use Passwords Effectively in 2021 | Dashlane Blog
11: What is IP Whitelisting? | Cloudflare
12: DDoS Attacks: Types, Techniques, and Protection | Cloudflare
13: IP Whitelisting: Pros and Cons | Imperva
NEW QUESTION # 501
As a cybersecurity analyst for SecureNet, you are performing a security assessment of a new mobile payment application. One of your primary concerns is the secure storage of customer data on the device. The application stores sensitive information such as credit card details and personal identification numbers (PINs) on the device. Which of the following measures would best ensure the security of this data?
Answer: D
Explanation:
Encrypting all sensitive data stored on the device is the best measure to ensure the security of this data, because it protects the data from unauthorized access or disclosure, even if the device is lost, stolen, or compromised. Encryption is a process of transforming data into an unreadable format using a secret key or algorithm. Only authorized parties who have the correct key or algorithm can decrypt and access the data.
Encryption can be applied to data at rest, such as files or databases, or data in transit, such as network traffic or messages. Encryption can prevent attackers from stealing or tampering with the customer data stored on the device, such as credit card details and PINs, which can cause financial or identity fraud.
The other options are not as effective or sufficient as encryption for securing the customer data stored on the device. Implementing biometric authentication for app access may provide an additional layer of security, but it does not protect the data from being accessed by other means, such as malware, physical access, or backup extraction. Enabling GPS tracking for all devices using the app may help locate the device in case of loss or theft, but it does not prevent the data from being accessed by unauthorized parties, and it may also pose privacy risks. Regularly updating the app to the latest version may help fix bugs or vulnerabilities, but it does not guarantee the security of the data, especially if the app does not use encryption or other security features. References:
* Securely Storing Data | Security.org
* Data Storage Security: 5 Best Practices to Secure Your Data
* M9: Insecure Data Storage | OWASP Foundation
NEW QUESTION # 502
During a penetration test at a technology startup in Austin, Texas, an ethical hacker is tasked with evaluating defenses against stealthy scanning techniques. She selects an approach that involves sending TCP packets with no flags, relying on the way target systems respond to infer whether ports are open or closed. This allows her to remain less visible to intrusion detection systems compared to a full handshake. Which scanning method is she using?
Answer: C
Explanation:
The method described-sending TCP packets with no flags set-is a NULL scan. In TCP header terminology, a NULL packet has all control flags cleared (no SYN, ACK, FIN, RST, PSH, URG). The scanner then interprets the target's response behavior to infer port state. Traditionally, for many TCP/IP stacks, a closed port responds with RST, while an open port may respond with no reply (silence) because the packet does not correspond to any valid state in the TCP state machine. This behavior can vary by OS and filtering devices, but the defining characteristic is the "no flags" probe.
The scenario also highlights stealth: compared to a TCP connect scan, which completes a full three-way handshake and is easily logged, NULL scans can be less conspicuous because they avoid a normal connection setup. Some intrusion detection systems focus heavily on repeated SYN handshakes or completed connections; unusual flag scans may slip through weak detection, though modern IDS/IPS can still detect them.
Why the other options are incorrect:
TCP Connect Scan (A) uses the operating system's connect() call to establish a full TCP connection; it is not a "no flags" technique and is generally noisier.
FIN Scan (B) sends packets with the FIN flag set; it is a different "stealth" scan type, but not "no flags." ACK Scan (D) sends packets with the ACK flag set and is typically used to map firewall rules (filtered vs unfiltered), not to determine open vs closed ports in the same way, and again it is not "no flags." Therefore, the scanning method is C. NULL Scan.
NEW QUESTION # 503
You went to great lengths to install all the necessary technologies to prevent hacking attacks, such as expensive firewalls, antivirus software, anti-spam systems, and intrusion detection/prevention tools in your company's network. You are confident that hackers will never be able to gain access. Your peer, Peter Smith, disagrees and says the presence of a "weakest link" still exposes the network.
What is Peter Smith talking about?
Answer: B
Explanation:
Comprehensive and Detailed Explanation:
The "weakest link" in cybersecurity is almost always the human element. Even with cutting-edge technology and airtight configurations, untrained or careless users can fall for phishing attacks, use weak passwords, or mishandle sensitive data - giving hackers a path into the system.
From CEH v13 Courseware:
* Module 7: Social Engineering
* Topic: Human Element in Security Breaches
Reference:CEH v13 Study Guide - Module 7: Insider Threats and Social EngineeringSANS Security Awareness Program - Human Risk Management
NEW QUESTION # 504
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