Free ICS-SCADA Exam Study Guide for the NEW [Nov-2024] Dumps Test Engine
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NEW QUESTION # 21
How many IPsec rules are there in Microsoft Firewall configuration?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
In the configuration of Microsoft Windows Firewall with Advanced Security, you can define IPsec rules as part of your security policy. Typically, these rules can be organized into four main categories: Allow connection, Block connection, Allow if secure (which can specify encryption or authentication requirements), and Custom. While the interface and features can vary slightly between Windows versions, four fundamental types of rules regarding how traffic is handled are commonly supported.
Reference:
Microsoft documentation, "Windows Firewall with Advanced Security".
NEW QUESTION # 22
Which of the following was attacked using the Stuxnet malware?
- A. PLC7
- B. PLC3
- C. PLCS
- D. All of these
Answer: C
Explanation:
Stuxnet is a highly sophisticated piece of malware discovered in 2010 that specifically targeted Supervisory Control and Data Acquisition (SCADA) systems used to control and monitor industrial processes.
The primary targets of Stuxnet were Programmable Logic Controllers (PLCs), which are critical components in industrial control systems.
Stuxnet was designed to infect Siemens Step7 software PLCs. It altered the operation of the PLCs to cause physical damage to the connected hardware, famously used against Iran's uranium enrichment facility, where it caused the fast-spinning centrifuges to tear themselves apart.
Reference
Langner, R. "Stuxnet: Dissecting a Cyberwarfare Weapon." IEEE Security & Privacy, May-June 2011.
"W32.Stuxnet Dossier," Symantec Corporation, Version 1.4, February 2011.
NEW QUESTION # 23
Which of the following names represents inbound filtering?
- A. Egress
- B. Sanity
- C. Ingress
- D. Funnel
Answer: C
Explanation:
Ingress filtering is a method used in network security to ensure that incoming packets are allowed or blocked based on a set of security rules.
This type of filtering is often implemented at the boundaries of networks to prevent unwanted or harmful traffic from entering a more secure internal network.
The term "ingress" refers to traffic that is entering a network boundary, whereas "egress" refers to traffic exiting a network.
Reference
Cisco Networking Academy Program: Network Security.
"Understanding Ingress and Egress Filtering," Network Security Guidelines, TechNet.
NEW QUESTION # 24
Which of the following is NOT ICS specific malware?
- A. Code Red
- B. Ha vex
- C. Stuxnet
- D. Flame
Answer: A
Explanation:
Code Red is not ICS specific malware; it was a famous worm that targeted computers running Microsoft's IIS web server. Unlike Flame, Havex, and Stuxnet, which were specifically designed to target industrial control systems or perform espionage related to ICS environments, Code Red was aimed at exploiting vulnerabilities in internet-facing software to perform denial-of-service attacks and other malicious activities.
Reference:
CERT Coordination Center, "Code Red Worm Exploiting Buffer Overflow In IIS Indexing Service DLL".
NEW QUESTION # 25
Which of the monitor alerts is considered most dangerous?
- A. False Positive
- B. True Positive
- C. True Negative
- D. False Negative
Answer: D
Explanation:
In the context of monitoring and alerts within cybersecurity, the classification of alerts includes true positives, false positives, true negatives, and false negatives.
A false negative is considered the most dangerous type of alert because it occurs when an actual security threat is present but the monitoring system fails to detect and alert it. This allows malicious activities to occur undetected, potentially leading to significant damage or data loss.
The risk with false negatives is that they provide a false sense of security, assuming that systems are secure while in reality, they are compromised.
Reference
"Security and Network Monitoring Basics," Cisco Systems.
"Understanding Alert Classifications in Cybersecurity," Journal of Information Security.
NEW QUESTION # 26
Which of the following ports are used for communications in Modbus TCP?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
Modbus TCP is a variant of the Modbus family of simple, networked protocols aimed at industrial automation applications. Unlike the original Modbus protocol, which runs over serial links, Modbus TCP runs over TCP/IP networks.
Port 502 is the standard TCP port used for Modbus TCP communications. This port is designated for Modbus messages encapsulated in a TCP/IP wrapper, facilitating communication between Modbus devices and management systems over an IP network.
Knowing the correct port number is crucial for network configuration, security settings, and troubleshooting communications within a Modbus-enabled ICS/SCADA environment.
Reference
Modbus Organization, "MODBUS Application Protocol Specification V1.1b3".
"Modbus TCP/IP - A Comprehensive Network protocol," by Schneider Electric.
NEW QUESTION # 27
Which of the IPsec headers contains the Security Parameters Index (SPI)?
- A. ESP
- B. AH
- C. ICV
- D. Both AH and ESP
Answer: D
Explanation:
IPsec uses two main protocols to secure network communications: Authentication Header (AH) and Encapsulating Security Payload (ESP).
Both AH and ESP use a Security Parameters Index (SPI), which is a critical component of their headers. The SPI is a unique identifier that enables the receiver to select the correct security association for processing incoming packets.
AH provides authentication and integrity, while ESP provides confidentiality, in addition to authentication and integrity. Both protocols use the SPI to manage these functions securely.
Reference
"IPsec Security Architecture," RFC 4302 (AH) and RFC 4303 (ESP).
"IPsec Explained," by Juniper Networks.
NEW QUESTION # 28
Which of the following are not a part of the temporal score in the CVSS? (Select all that apply.)
- A. Remediation Level
- B. Reporting Confidence
- C. Attack Vector
- D. User Interaction
Answer: C,D
Explanation:
The Common Vulnerability Scoring System (CVSS) provides a way to capture the principal characteristics of a vulnerability and produce a numerical score reflecting its severity.
The temporal score in CVSS adjusts the base score of a vulnerability based on factors that change over time, such as the availability of exploits or the existence of patches.
The temporal score includes:
Remediation Level
Report Confidence
Attack Vector and User Interaction are part of the base score, not the temporal score, as they describe the fundamental characteristics of the vulnerability and do not typically change over time.
Reference
Common Vulnerability Scoring System v3.1: Specification Document.
"Understanding CVSS," by FIRST (Forum of Incident Response and Security Teams).
NEW QUESTION # 29
Which of the IEC 62443 security levels is identified by a hacktivist/terrorist target?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
IEC 62443 defines multiple security levels (SLs) tailored to address different types of threats and attackers in industrial control systems.
Security Level 4 (SL4) is designed to protect against sophisticated attacks by adversaries such as hacktivists or terrorists. SL4 involves threats that are targeted with specific intent against the organization, using advanced skills and means.
This level assumes that the adversary is capable of sustained and focused efforts with significant resources, including state-level actors or well-funded groups, aiming at causing widespread disruption or damage.
Reference
IEC 62443-3-3: System security requirements and security levels.
"Industrial Network Security: Securing Critical Infrastructure Networks for Smart Grid, SCADA, and Other Industrial Control Systems," by Eric Knapp.
NEW QUESTION # 30
Which of the ICS/SCADA generations is considered distributed?
- A. Third
- B. Fourth
- C. First
- D. Knapp, J. Langill, "Industrial Network Security," Syngress, 2014.
- E. Second
Answer: A
Explanation:
The third generation of ICS/SCADA systems is considered distributed. This generation features systems that are networked and interconnected, typically using a variety of standard communication protocols. This distribution allows for broader connectivity and integration with other systems, enhancing operational flexibility and efficiency but also introducing more vectors for potential cyber threats.
Reference:
Joseph Weiss, "Protecting Industrial Control Systems from Electronic Threats".
The third generation of ICS/SCADA systems is considered distributed. These systems emerged in the late 1990s and early 2000s and were designed to overcome the limitations of earlier generations by leveraging networked architectures.
Distributed Architecture: Third-generation systems distributed control functions across multiple interconnected devices and systems, providing greater scalability and flexibility.
Network Integration: These systems integrated more extensively with IT networks, allowing for remote monitoring and control.
Standard Protocols: Adoption of standard communication protocols (e.g., Ethernet, TCP/IP) facilitated interoperability and integration with other systems.
Enhanced Redundancy: Improved fault tolerance and redundancy were implemented to ensure system reliability.
Due to these features, the third generation is known as the distributed generation.
Reference
"SCADA Systems," SCADAHacker, SCADA Generations.
NEW QUESTION # 31
Which of the CVSS metrics refer to the exploit quotient of the vulnerability?
- A. IBase
- B. Temporal
- C. Environmental
- D. All of these
Answer: B
Explanation:
The Common Vulnerability Scoring System (CVSS) uses several metrics to assess the severity of vulnerabilities. Among them, the Temporal metric group specifically reflects the exploit quotient of a vulnerability.
Temporal metrics consider factors that change over time after a vulnerability is initially assessed. These include:
Exploit Code Maturity: This assesses the likelihood of the vulnerability being exploited based on the availability and maturity of exploit code.
Remediation Level: The level of remediation available for the vulnerability, which influences the ease of mitigation.
Report Confidence: This metric measures the reliability of the reports about the vulnerability.
These temporal factors directly affect the exploitability and potential threat posed by a vulnerability, adjusting the base score to provide a more current view of the risk.
Reference
Common Vulnerability Scoring System v3.1: User Guide.
"Understanding CVSS," by FIRST (Forum of Incident Response and Security Teams).
NEW QUESTION # 32
Which of the following is a weakness of a vulnerability scanner?
- A. Work best on a local network
- B. Not designed to go through filters
- C. Maintains a signature database
- D. Detect known vulnerabilities
Answer: B
Explanation:
One weakness of a vulnerability scanner is that it is not designed to go through filters or bypass security controls like firewalls or intrusion detection systems. Vulnerability scanners typically perform well in identifying known weaknesses within the perimeter of a network or system but might not effectively assess systems that are shielded by robust security measures, which can filter out the scanner's attempts to probe or attack.
Reference:
National Institute of Standards and Technology (NIST), "Technical Guide to Information Security Testing and Assessment".
NEW QUESTION # 33
Which of the following are valid TCP flags?
- A. FIN,PSH,URG,RST,SYN
- B. BGP,FIN,PSH,SYN,ACK
- C. IGP,ACK,SYN,PSH,URG
- D. None of these
Answer: A
Explanation:
TCP flags are used in the header of TCP segments to control the flow of data and to indicate the status of a connection. Valid TCP flags include:
FIN: Finish, used to terminate the connection.
PSH: Push, instructs the receiver to pass the data to the application immediately.
URG: Urgent, indicates that the data contained in the segment should be processed urgently.
RST: Reset, abruptly terminates the connection upon error or other conditions.
SYN: Synchronize, used during the initial handshake to establish a connection.
These flags are integral to managing the state and flow of TCP connections.
Reference:
Douglas E. Comer, "Internetworking with TCP/IP Vol.1: Principles, Protocols, and Architecture".
NEW QUESTION # 34
Which of the TCP flags represents data in the packet?
- A. FIN
- B. PSH
- C. ACK
- D. RST
Answer: B
Explanation:
The PSH (Push) flag in the TCP header instructs the receiving host to push the data to the receiving application immediately without waiting for the buffer to fill. This is used to ensure that data is not delayed, thus improving the efficiency of communication where real-time data processing is required. It effectively tells the system that the data in the packet should be considered urgent.
Reference:
Douglas E. Comer, "Internetworking with TCP/IP Vol.1: Principles, Protocols, and Architecture".
NEW QUESTION # 35
Which of the following is the stance on risk that by default allows traffic with a default permit approach?
- A. Permissive
- B. Paranoid
- C. Promiscuous
- D. Prudent
Answer: A
Explanation:
In network security, the stance on managing and assessing risk can vary widely depending on the security policies of an organization.
A "Permissive" stance, often referred to as a default permit approach, allows all traffic unless it has been specifically blocked. This approach can be easier to manage from a usability standpoint but is less secure as it potentially allows unwanted or malicious traffic unless explicitly filtered.
This is in contrast to a more restrictive policy, which denies all traffic unless it has been explicitly permitted, typically seen in more secure environments.
Reference
"Network Security Basics," by Cisco Systems.
"Understanding Firewall Policies," by Fortinet.
NEW QUESTION # 36
Which of the following is required to determine the correct Security Association?
- A. Protocol
- B. Partner IP address
- C. SPI
- D. All of these
Answer: D
Explanation:
To determine the correct Security Association (SA) in the context of IPsec, several elements are required:
SPI (Security Parameter Index): Uniquely identifies the SA.
Partner IP address: The address of the endpoint with which the SA is established.
Protocol: Specifies the type of security protocol used (e.g., AH or ESP). All these components collectively define and identify a specific SA for secure communication between parties.
Reference:
RFC 4301, "Security Architecture for the Internet Protocol".
NEW QUESTION # 37
What is a vulnerability called that is released before a patch comes out?
- A. Zero day
- B. First
- C. Initial
- D. Pre-release
Answer: A
Explanation:
A vulnerability that is exploited before the vendor has issued a patch or even before the vulnerability is known to the vendor is referred to as a "zero-day" vulnerability. The term "zero-day" refers to the number of days the software vendor has had to address and patch the vulnerability since it was made public-zero, in this case.
Reference:
Symantec Security Response, "Zero Day Initiative".
NEW QUESTION # 38
What does the SPI within IPsec identify?
- A. Security Association
- B. Key Exchange
- C. Decryption algorithm
- D. All of these
Answer: A
Explanation:
Within IPsec, the SPI (Security Parameter Index) is a critical component that uniquely identifies a Security Association (SA) for the IPsec session. The SPI is used in the IPsec headers to help the receiving party determine which SA has been agreed upon for processing the incoming packets. This identification is crucial for the proper operation and management of security policies applied to the encrypted data flows.
Reference:
RFC 4301, "Security Architecture for the Internet Protocol," which discusses the structure and use of the SPI in IPsec communications.
NEW QUESTION # 39
Which of the following steps is used to reveal the IP addressing?
- A. Enumeration
- B. Surveillance
- C. Footprinting
- D. Cover your tracks
Answer: A
Explanation:
Enumeration is a step in the information-gathering phase of a penetration test or cyber attack where an attacker actively engages with the target to extract detailed information, including IP addressing.
Enumeration: During enumeration, the attacker interacts with network services to gather information such as user accounts, network shares, and IP addresses.
Techniques: Common techniques include using tools like Nmap, Netcat, and Nessus to scan for open ports, services, and to identify the IP addresses in use.
Purpose: The goal is to map the network's structure, find potential entry points, and understand the layout of the target environment.
Because enumeration involves discovering detailed information including IP addresses, it is the correct answer.
Reference
"Enumeration in Ethical Hacking," GeeksforGeeks, Enumeration.
"Network Enumeration," Wikipedia, Network Enumeration.
NEW QUESTION # 40
Which of the following is the stance that by default has a default deny approach?
- A. Paranoid
- B. Permissive
- C. Promiscuous
- D. Prudent
Answer: A
Explanation:
In the context of network security policies, a "Paranoid" stance typically means adopting a default-deny posture. This security approach is one of the most restrictive, where all access is blocked unless explicitly allowed.
A default deny strategy is considered best practice for securing highly sensitive environments, as it minimizes the risk of unauthorized access and reduces the attack surface.
This approach contrasts with more open stances such as Permissive or Promiscuous, which are less restrictive and generally allow more traffic by default.
Reference
"Network Security: Policies and Guidelines for Effective Network Management," by Jonathan Gossels.
"Best Practices for Implementing a Security Awareness Program," by Kaspersky Lab.
NEW QUESTION # 41
What is used in the Modbus protocol to tell the slave to read or write?
- A. Slave command
- B. Unit ID
- C. Function code
- D. None of these
Answer: C
Explanation:
In the Modbus protocol, the function code is used to tell the slave device what kind of action to perform, such as reading or writing data.
Modbus function codes specify the type of operation to be performed on the registers. For example, function code 03 is used to read holding registers, and function code 06 is used to write a single register.
Each function code is a single byte in size and is positioned at the start of the PDU (Protocol Data Unit) in the Modbus message structure, directly influencing how the slave interprets and executes the request.
Reference
"Modbus Application Protocol Specification V1.1b," Modbus Organization.
"The Modbus Protocol Explained," by Schneider Electric.
NEW QUESTION # 42
What is the extension of nmap scripts?
- A. .nse
- B. .nsv
- C. .ns
- D. .nsn
Answer: A
Explanation:
Nmap scripts, which are used to enhance the functionality of Nmap for performing network discovery, security auditing, and other tasks, have the extension .nse. This stands for Nmap Scripting Engine, which allows users to write scripts to automate a wide variety of networking tasks.
Reference:
Nmap Network Scanning by Gordon Lyon (also known as Fyodor Vaskovich), detailing the use and examples of Nmap scripts.
NEW QUESTION # 43
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