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NO.10 Which steps are part of implementing countermeasures?
Available Choices (select all choices that are correct)

Establish the risk tolerance and select common countermeasures.

Establish the risk tolerance and update the business continuity plan.

Select common countermeasures and update the business continuity plan.

Select common countermeasures and collaborate with stakeholders.

NO.11 Security Levels (SLs) are broken down into which three types?
Available Choices (select all choices that are correct)

SL-1, SL-2, and SL-3

Target.capability, and achieved

Target.capability, and availability

Target.capacity, and achieved

NO.12 Which is the BEST practice when establishing security zones?
Available Choices (select all choices that are correct)

Security zones should contain assets that share common security requirements.

Security zones should align with physical network segments.

Assets within the same logical communication network should be in the same security zone.

All components in a large or complex system should be in the same security zone.

NO.13 Which is the PRIMARY reason why Modbus over Ethernet is easy to manaqe in a firewall?
Available Choices (select all choices that are correct)

Modbus uses a single master to communicate with multiple slaves usinq simple commands.

Modbus is a proprietary protocol that is widely supported by vendors.

Modbus uses explicit source and destination IP addresses and a sinqle known TCP port.

Modbus has no known security vulnerabilities, so firewall rules are simple to implement.

NO.14 What is the definition of “defense in depth” when referring to
Available Choices (select all choices that are correct)

Using countermeasures that have intrinsic technical depth.

Aligning all resources to provide a broad technical gauntlet

Requiring a minimum distance requirement between security assets

Applying multiple countermeasures in a layered or stepwise manner

NO.15 Which of the following tools has the potential for serious disruption of a control network and should not be
used on a live system?
Available Choices (select all choices that are correct)

Remote desktop

Vulnerability scanner

FTP

Web browser

NO.16 What is OPC?
Available Choices (select all choices that are correct)

An open standard protocol for real-time field bus communication between automation technology
devices

An open standard protocol for the communication of real-time data between devices from different
manufacturers

An open standard serial communications protocol widely used in industrial manufacturing environments

A vendor-specific proprietary protocol for the communication of real-time plant data between control devices

NO.17 Which layer in the Open Systems Interconnection (OSI) model would include the use of the File Transfer
Protocol (FTP)?
Available Choices (select all choices that are correct)

Application layer

Data link layer

Session layer

Transport layer

NO.18 Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)

Failure Mode and Effects Analysis

Job Safety Analysis

Process Hazard Analysis (PHA)

System Safety Analysis(SSA)

NO.19 Which of the following is an element of security policy, organization, and awareness?
Available Choices (select all choices that are correct)

Product development requirements

Staff training and security awareness

Technical requirement assessment

Penetration testing

NO.20 Which policies and procedures publication is titled Patch Manaqement in the IACS Environment?
Available Choices (select all choices that are correct)

ISA-TR62443-2-3

ISA-TR62443-1-4

ISA-62443-3-3

ISA-62443-4-2

NO.21 Which analysis method is MOST frequently used as an input to a security risk assessment?
Available Choices (select all choices that are correct)

Failure Mode and Effects Analysis

Job Safety Analysis(JSA)

Process Hazard Analysis (PHA)

System Safety Analysis(SSA)

NO.22 Which steps are included in the ISA/IEC 62443 assess phase?
Available Choices (select all choices that are correct)

Cybersecurity requirements specification and detailed cyber risk assessment

Cybersecurity requirements specification and allocation of IACS assets to zones and conduits

Detailed cyber risk assessment and cybersecurity maintenance, monitoring, and management of change

Allocation of IACS assets to zones and conduits, and detailed cyber risk assessment

NO.23 At Layer 4 of the Open Systems Interconnection (OSI) model, what identifies the application that will handle a
packet inside a host?
Available Choices (select all choices that are correct)

ATCP/UDP application ID

A TCP/UDP host ID

ATCP/UDP port number

ATCP/UDP registry number

NO.24 Which is a physical layer standard for serial communications between two or more devices?
Available Choices (select all choices that are correct)

RS232

RS235

RS432

RS435

NO.25 What is the name of the missing layer in the Open Systems Interconnection (OSI) model shown below?

Control

Protocol

Transport

User

NO.26 Which is an important difference between IT systems and IACS?
Available Choices (select all choices that are correct)

The IACS security priority is integrity.

The IT security priority is availability.

IACS cybersecurity must address safety issues.

Routers are not used in IACS networks.

NO.27 Multiuser accounts and shared passwords inherently carry which of the followinq risks?
Available Choices (select all choices that are correct)

Privilege escalation

Buffer overflow

Unauthorized access

Race conditions

NO.28 In an IACS system, a typical security conduit consists of which of the following assets?
Available Choices (select all choices that are correct)

Controllers, sensors, transmitters, and final control elements

Wiring, routers, switches, and network management devices

Ferrous, thickwall, and threaded conduit including raceways

Power lines, cabinet enclosures, and protective grounds

NO.29 Which is a commonly used protocol for managing secure data transmission on the Internet?
Available Choices (select all choices that are correct)

Datagram Transport Layer Security (DTLS)

Microsoft Point-to-Point Encryption

Secure Telnet

Secure Sockets Layer

NO.30 What does the abbreviation CSMS round in ISA 62443-2-1 represent?
Available Choices (select all choices that are correct)

Control System Management System

Control System Monitoring System

Cyber Security Management System

Cyber Security Monitoring System

NO.31 What are the two sublayers of Layer 2?
Available Choices (select all choices that are correct)

HIDS and NIDS

LLC and MAC

OPC and DCOM

VLAN and VPN

NO.32 Which is a role of the application layer?
Available Choices (select all choices that are correct)

Includes protocols specific to network applications such as email, file transfer, and reading data registers
in a PLC

Includes user applications specific to network applications such as email, file transfer, and reading data
registers in a PLC

Provides the mechanism for opening, closing, and managing a session between end-user application
processes

Delivers and formats information, possibly with encryption and security

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