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Fortinet ICS-SCADA Exam Syllabus Topics:
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NEW QUESTION # 41
Which of the following ports are used for communications in Modbus TCP?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
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 # 42
Which component of the IT Security Model is attacked with masquerade?
- A. Confidentiality
- B. Integrity
- C. Authentication
- D. Availability
Answer: C
Explanation:
A masquerade attack involves an attacker pretending to be an authorized user of a system, thus compromising the authentication component of the IT security model. Authentication ensures that the individuals accessing the system are who they claim to be. By masquerading as a legitimate user, an attacker can bypass this security measure and gain unauthorized access to the system.
Reference:
William Stallings, "Security in Computing".
NEW QUESTION # 43
How many firewalls are there in the most common ICS/SCADA architecture?
- A. 0
- B. 1
- C. 2
- D. None of these
Answer: B
Explanation:
The most common ICS/SCADA architecture typically includes two firewalls. This dual firewall configuration often involves one firewall placed between the enterprise network and the ICS/SCADA network, and another between the ICS/SCADA network and the plant floor devices. This arrangement, known as a "demilitarized zone" (DMZ) between the two firewalls, adds an additional layer of security to help isolate and protect sensitive operational technology (OT) environments from threats originating from IT networks.
Reference:
National Institute of Standards and Technology (NIST), "Guide to Industrial Control Systems (ICS) Security".
NEW QUESTION # 44
Which of the following is the stance that by default has a default deny approach?
- A. Promiscuous
- B. Paranoid
- C. Permissive
- D. Prudent
Answer: B
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 # 45
With respect to data analysis, which of the following is not a step?
- A. vulnerabilities
- B. All of these
- C. Enumeration
- D. Scanning for targets
Answer: C
Explanation:
In the context of data analysis, enumeration is not typically considered a step. Enumeration is more relevant in security assessments and network scanning contexts where specific details about devices, users, or services are cataloged. Data analysis steps typically include gathering data, preprocessing, analyzing, and interpreting results rather than enumeration, which is more about identifying and listing components in a system or network.
Reference:
"Data Science from Scratch" by Joel Grus, which outlines common steps in data analysis.
NEW QUESTION # 46
Which of the IEC 62443 security levels is identified by a hacktivist/terrorist target?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
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 # 47
Which of the following are required functions of information management?
- A. Correlation
- B. Normalization
- C. All of these
- D. Date enrichment
Answer: C
Explanation:
Information management within the context of network security involves several critical functions that ensure data is correctly handled for security operations. These functions include:
Normalization: This process standardizes data formats from various sources to a common format, making it easier to analyze systematically.
Correlation: This function identifies relationships between disparate pieces of data, helping to identify patterns or potential security incidents.
Data enrichment: Adds context to the collected data, enhancing the information with additional details, such as threat intelligence.
All these functions are essential to effective information management in security systems, allowing for more accurate monitoring and faster response to potential threats.
Reference
"Data Enrichment and Correlation in SIEM Systems," Security Information Management Best Practices.
"Normalization Techniques for Security Data," Journal of Network Security.
NEW QUESTION # 48
What is the extension of nmap scripts?
- A. .nse
- B. .nsn
- C. .ns
- D. .nsv
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 # 49
What form of attack uses a vector that infects a software package?
- A. Quicksand
- B. Spam
- C. All of these
- D. Watering Hole
Answer: D
Explanation:
A "watering hole" attack is a security exploit in which the attacker seeks to compromise a specific group of end users by infecting websites that members of the group are known to visit.
The goal is to infect a website that members of a targeted community frequently use with malware. Once a user visits the compromised website, malware can be delivered to the user's system, exploiting vulnerabilities on their device.
This attack vector is used in scenarios where attackers want to breach secure environments indirectly by targeting less secure points in a network's ecosystem, such as third-party software used within the organization.
Reference
"Watering Hole Attacks: Detect, Disrupt, and Prevent," by Kaspersky Lab.
"Emerging Threats in Cybersecurity: Understanding Watering Hole Attacks," published in the Journal of Network Security.
NEW QUESTION # 50
At what layer does a switch normally operate?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
A network switch typically operates at Layer 2 of the OSI model, which is the Data Link layer. This layer is responsible for node-to-node data transfer-a function that involves handling data frames between physical devices on the same network or link. The switch uses MAC addresses to forward data to the appropriate destination within the network.
Reference:
Andrew S. Tanenbaum, "Computer Networks".
NEW QUESTION # 51
Which of the following are valid TCP flags?
- A. FIN,PSH,URG,RST,SYN
- B. IGP,ACK,SYN,PSH,URG
- C. None of these
- D. BGP,FIN,PSH,SYN,ACK
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 # 52
Which of the following is a component of an IDS?
- A. Detect
- B. Monitor
- C. All of these
- D. Respond
Answer: C
Explanation:
An Intrusion Detection System (IDS) is designed to monitor network or system activities for malicious activities or policy violations and can perform several functions:
Monitor: Observing network traffic and system activities for unusual or suspicious behavior.
Detect: Identifying potential security breaches including both known threats and unusual activities that could indicate new threats.
Respond: Executing pre-defined actions to address detected threats, which can include alerts or triggering automatic countermeasures.
Reference:
Cisco Systems, "Intrusion Detection Systems".
NEW QUESTION # 53
What is the size of the AH in bits with respect to width?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
The Authentication Header (AH) in the context of IPsec has a fixed header portion of 24 bits and a mutable part that can vary, but when considering the fixed structure of the AH itself, the width is typically considered to be 32 bits at its core structure for basic operations in providing integrity and authentication, without confidentiality.
Reference:
RFC 4302, "IP Authentication Header".
NEW QUESTION # 54
How many IPsec modes are there?
- A. Two
- B. Three
- C. Four
- D. None of these
Answer: A
Explanation:
IPsec (Internet Protocol Security) primarily operates in two modes: Transport mode and Tunnel mode.
Transport mode: Encrypts only the payload of each packet, leaving the header untouched. This mode is typically used for end-to-end communication between two systems.
Tunnel mode: Encrypts both the payload and the header of each IP packet, which is then encapsulated into a new IP packet with a new header. Tunnel mode is often used for network-to-network communications (e.g., between two gateways) or between a remote client and a gateway.
Reference
"Security Architecture for the Internet Protocol," RFC 4301.
"IPsec Modes of Operation," by Internet Engineering Task Force (IETF).
NEW QUESTION # 55
What is the default size in bits of the Windows Echo Request packet?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
The default size of a Windows Echo Request packet, commonly known as a ping request, is 28 bytes. This size is derived from the following components:
ICMP Header: The Internet Control Message Protocol (ICMP) header is 8 bytes.
IPv4 Header: The IP header for an IPv4 packet is typically 20 bytes.
Therefore, the total size of the default Windows Echo Request packet is 28 bytes (8 bytes for ICMP header + 20 bytes for IPv4 header).
Reference
"Ping (networking utility)," Wikipedia, Ping.
"ICMP Header Format," Cisco, ICMP Header.
NEW QUESTION # 56
Which publication from NIST provides guidance on Industrial Control Systems?
- A. NIST SP 800-44
- B. NIST SP 800-82
- C. NIST SP 800-77
- D. NIST SP 800-90
Answer: B
Explanation:
NIST Special Publication 800-82, "Guide to Industrial Control Systems (ICS) Security," provides guidance on securing industrial control systems, including SCADA systems, distributed control systems (DCS), and other control system configurations such as programmable logic controllers (PLC). It offers practices and recommendations for protecting and securing ICS systems against disruptions, malicious activities, and other threats to their integrity and availability.
Reference:
National Institute of Standards and Technology (NIST), "Guide to Industrial Control Systems (ICS) Security".
NEW QUESTION # 57
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