ISA
ISA-IEC-62443-IC37M
ISA/IEC 62443 Cybersecurity Maintenance Specialist
(Certificate 4) (IC37) Latest Version: 6.0
Newest Version 2025-2026 Question And Correct
Answers.
Question: 1
You are tasked with monitoring the effectiveness of the IACS security program. Which of the following
should be your primary focus?
A. The amount of budget allocated to cybersecurity
B. The number of systems connected to the network
C. The frequency of security audits
D. Employee compliance with security protocols
Answer: D
,Explanation:
Employee compliance with security protocols should be the primary focus, as it directly impacts the
effectiveness of the IACS security program.
Question: 2
When the Product Supplier provides technical support to resolve a cybersecurity issue found during
maintenance, which of the following should be included?
A. Root cause analysis and mitigation recommendations
B. Immediate deployment of fixes without Asset Owner notification
C. Updated security advisories and patch release notes
D. Post-implementation validation guidelines
Answer: A,C,D
Explanation:
Root cause analysis, advisories, and validation guidelines ensure effective issue resolution. Immediate
deployment without notification is not consistent with collaboration best practices.
Question: 3
In ISA/IEC 62443 secure maintenance, how should maintenance zone boundaries be defined and
protected?
A. Establish firewalls enforcing strict policies on maintenance conduits
B. Permit all inbound traffic for ease of maintenance troubleshooting
C. Use network segmentation to isolate maintenance devices from production
D. Disable intrusion detection systems in maintenance zones to avoid interference
Answer: A,C
Explanation:
Firewalls and segmentation maintain zone integrity. Permitting all traffic and disabling IDS undermine
security.
Question: 4
Which of the following should be included in an incident response plan to address potential
cybersecurity incidents effectively?
A. A list of all software applications used
B. Procedures for communication and escalation
C. A detailed inventory of hardware assets
D. Employee performance metrics
Answer: B
, Explanation:
Procedures for communication and escalation should be included in an incident response plan to address
potential cybersecurity incidents effectively. Clear communication channels are vital for coordinated
responses.
Question: 5
In a scenario where a new vulnerability is discovered in a control system component, what are key steps
to maintain cybersecurity during maintenance?
A. Immediately removing and isolating the affected component without consulting the asset owner
B. Implementing compensating controls to reduce risk while permanent fixes are evaluated
C. Maintaining detailed change logs including the reason for mitigation and timelines
D. Communicating the vulnerability status and risk acceptance to asset owners and stakeholders
Answer: B,C,D
Explanation:
Isolating without consultation may disrupt processes. Compensating controls reduce immediate risk.
Detailed logs support compliance and auditability. Transparent communication ensures informed risk
management by owners.
Question: 6
Baseline script for EtherCAT frame errors in robotics IACS per 62443-3-1, using R with ggplot for 10-day
plot, excluding errors <1%?
A. library(ggplot2); df <- read.csv("ecat_errors.csv"); df$date <- as.Date(df$date); baseline <-
df[df$error_rate < 0.01, ]; ggplot(baseline, aes(date, error_rate)) + geom_line() + labs(title="10d
Baseline")
B. errors <- read.csv("robot_logs.csv")[1:10,]; ggplot(errors[errors$rate<1,], aes(x=day, y=frame_error))
+geom_smooth() + theme_minimal()
C. df = read.csv("iacs_ecat.csv"); subset(df, date >= Sys.Date()-10 & pct_error <1) |> ggplot(aes(date,
pct)) +geom_bar()
D. ecat_df <- read.csv("10d_errors.csv"); filter(ecat_df, error<0.01) |> ggplot + line(aes(time, rate))
Answer: A
Explanation:
Baselines per 62443-3-1 use visualization for trends. The script library(ggplot2); df <-
read.csv("ecat_errors.csv"); df$date <- as.Date(df$date); baseline <- df[df$error_rate < 0.01, ];
ggplot(baseline, aes(date, error_rate)) + geom_line() + labs(title="10d Baseline") filters <1% errors over
10 days, plots line for robotics EtherCAT normalcy.
Question: 7
During development of an incident response plan per ISA/IEC 62443-2-1, which roles should be clearly
defined for effective communication during an incident?
ISA-IEC-62443-IC37M
ISA/IEC 62443 Cybersecurity Maintenance Specialist
(Certificate 4) (IC37) Latest Version: 6.0
Newest Version 2025-2026 Question And Correct
Answers.
Question: 1
You are tasked with monitoring the effectiveness of the IACS security program. Which of the following
should be your primary focus?
A. The amount of budget allocated to cybersecurity
B. The number of systems connected to the network
C. The frequency of security audits
D. Employee compliance with security protocols
Answer: D
,Explanation:
Employee compliance with security protocols should be the primary focus, as it directly impacts the
effectiveness of the IACS security program.
Question: 2
When the Product Supplier provides technical support to resolve a cybersecurity issue found during
maintenance, which of the following should be included?
A. Root cause analysis and mitigation recommendations
B. Immediate deployment of fixes without Asset Owner notification
C. Updated security advisories and patch release notes
D. Post-implementation validation guidelines
Answer: A,C,D
Explanation:
Root cause analysis, advisories, and validation guidelines ensure effective issue resolution. Immediate
deployment without notification is not consistent with collaboration best practices.
Question: 3
In ISA/IEC 62443 secure maintenance, how should maintenance zone boundaries be defined and
protected?
A. Establish firewalls enforcing strict policies on maintenance conduits
B. Permit all inbound traffic for ease of maintenance troubleshooting
C. Use network segmentation to isolate maintenance devices from production
D. Disable intrusion detection systems in maintenance zones to avoid interference
Answer: A,C
Explanation:
Firewalls and segmentation maintain zone integrity. Permitting all traffic and disabling IDS undermine
security.
Question: 4
Which of the following should be included in an incident response plan to address potential
cybersecurity incidents effectively?
A. A list of all software applications used
B. Procedures for communication and escalation
C. A detailed inventory of hardware assets
D. Employee performance metrics
Answer: B
, Explanation:
Procedures for communication and escalation should be included in an incident response plan to address
potential cybersecurity incidents effectively. Clear communication channels are vital for coordinated
responses.
Question: 5
In a scenario where a new vulnerability is discovered in a control system component, what are key steps
to maintain cybersecurity during maintenance?
A. Immediately removing and isolating the affected component without consulting the asset owner
B. Implementing compensating controls to reduce risk while permanent fixes are evaluated
C. Maintaining detailed change logs including the reason for mitigation and timelines
D. Communicating the vulnerability status and risk acceptance to asset owners and stakeholders
Answer: B,C,D
Explanation:
Isolating without consultation may disrupt processes. Compensating controls reduce immediate risk.
Detailed logs support compliance and auditability. Transparent communication ensures informed risk
management by owners.
Question: 6
Baseline script for EtherCAT frame errors in robotics IACS per 62443-3-1, using R with ggplot for 10-day
plot, excluding errors <1%?
A. library(ggplot2); df <- read.csv("ecat_errors.csv"); df$date <- as.Date(df$date); baseline <-
df[df$error_rate < 0.01, ]; ggplot(baseline, aes(date, error_rate)) + geom_line() + labs(title="10d
Baseline")
B. errors <- read.csv("robot_logs.csv")[1:10,]; ggplot(errors[errors$rate<1,], aes(x=day, y=frame_error))
+geom_smooth() + theme_minimal()
C. df = read.csv("iacs_ecat.csv"); subset(df, date >= Sys.Date()-10 & pct_error <1) |> ggplot(aes(date,
pct)) +geom_bar()
D. ecat_df <- read.csv("10d_errors.csv"); filter(ecat_df, error<0.01) |> ggplot + line(aes(time, rate))
Answer: A
Explanation:
Baselines per 62443-3-1 use visualization for trends. The script library(ggplot2); df <-
read.csv("ecat_errors.csv"); df$date <- as.Date(df$date); baseline <- df[df$error_rate < 0.01, ];
ggplot(baseline, aes(date, error_rate)) + geom_line() + labs(title="10d Baseline") filters <1% errors over
10 days, plots line for robotics EtherCAT normalcy.
Question: 7
During development of an incident response plan per ISA/IEC 62443-2-1, which roles should be clearly
defined for effective communication during an incident?
