PCI DSS - PAYMENT CARD INDUSTRY DATA SECURITY STANDARD
REAL QUESTIONS + DETAILED ANSWERS - LATEST VERSION - TOP
RATED (2026/2027)
Q1: What does PCI DSS stand for?
ANSWER PCI DSS stands for Payment Card Industry Data Security Standard.
Q2: Who developed PCI DSS?
ANSWER PCI DSS was developed by the Payment Card Industry Security
Standards Council (PCI SSC), founded by American Express, Discover, JCB,
Mastercard, and Visa.
Q3: When was the PCI SSC founded?
ANSWER The PCI SSC was founded in September 2006.
Q4: What is the primary goal of PCI DSS?
ANSWER The primary goal is to protect cardholder data and reduce credit card
fraud by ensuring that all companies that accept, process, store, or transmit card
payment information maintain a secure environment.
Q5: What is the current version of PCI DSS?
ANSWER PCI DSS version 4.0.1 is the current version, released in June 2024,
with full enforcement by March 31, 2025.
Q6: Who must comply with PCI DSS?
ANSWER Any organization that stores, processes, or transmits cardholder data
(CHD) or sensitive authentication data (SAD), including merchants, service
providers, and financial institutions.
Q7: What are the six goals of PCI DSS?
ANSWER 1) Build and maintain a secure network and systems, 2) Protect
cardholder data, 3) Maintain a vulnerability management program, 4) Implement
strong access control measures, 5) Regularly monitor and test networks, 6)
Maintain an information security policy.
PCI DSS Study Guide | Page 1
,Q8: How many requirements does PCI DSS v4.0 contain?
ANSWER PCI DSS v4.0 contains 12 principal requirements.
Q9: What is cardholder data (CHD)?
ANSWER Cardholder data includes the Primary Account Number (PAN),
cardholder name, expiration date, and service code.
Q10: What is sensitive authentication data (SAD)?
ANSWER SAD includes full track data (magnetic stripe or chip data),
CAV2/CVC2/CVV2/CID codes, and PINs/PIN blocks.
Q11: Can sensitive authentication data be stored after authorization?
ANSWER No. SAD must not be stored after authorization, even if encrypted.
Q12: What is the Cardholder Data Environment (CDE)?
ANSWER The CDE is the people, processes, and technology that store, process,
or transmit cardholder data or SAD, plus any systems connected to or that could
impact the security of those systems.
Q13: What is a Primary Account Number (PAN)?
ANSWER The PAN is the unique payment card number (credit or debit) that
identifies the issuer and the account.
Q14: What is PCI DSS scope?
ANSWER PCI DSS scope includes all system components included in or
connected to the CDE, as well as components that could impact the security of the
CDE.
Q15: What is network segmentation in PCI DSS?
ANSWER Network segmentation isolates the CDE from the rest of the corporate
network, reducing the scope of PCI DSS compliance requirements.
Q16: What is a merchant level in PCI DSS?
ANSWER Merchant levels (1–4) are classifications based on annual transaction
volume, determining the required validation method.
Q17: What is a Level 1 merchant?
ANSWER A Level 1 merchant processes over 6 million card transactions per year
across all channels, and requires an annual on-site audit by a QSA.
PCI DSS Study Guide | Page 2
,Q18: What is a Qualified Security Assessor (QSA)?
ANSWER A QSA is a company and individual certified by PCI SSC to perform
PCI DSS compliance assessments.
Q19: What is an Internal Security Assessor (ISA)?
ANSWER An ISA is an employee certified by PCI SSC who can perform PCI
DSS assessments for their own organization.
Q20: What is a Self-Assessment Questionnaire (SAQ)?
ANSWER An SAQ is a validation tool for eligible merchants and service
providers to self-evaluate PCI DSS compliance.
Q21: How many SAQ types are there?
ANSWER There are multiple SAQ types (A, A-EP, B, B-IP, C, C-VT, D, P2PE)
designed for different merchant environments.
Q22: What is SAQ A?
ANSWER SAQ A is for merchants who have outsourced all cardholder data
functions to PCI DSS compliant third parties and do not store, process, or transmit
CHD electronically.
Q23: What is a Report on Compliance (ROC)?
ANSWER A ROC is a detailed report documenting the results of a PCI DSS
assessment, required for Level 1 merchants.
Q24: What is an Attestation of Compliance (AOC)?
ANSWER An AOC is a document signed by a merchant or service provider and
assessor affirming the results of a PCI DSS assessment.
Q25: What are the penalties for PCI DSS non-compliance?
ANSWER Penalties can include fines from $5,000 to $100,000 per month,
increased transaction fees, card brand restrictions, and potential loss of ability to
process card payments.
Requirements 1 & 2 — Network Security
Q26: What does PCI DSS Requirement 1 address?
PCI DSS Study Guide | Page 3
, ANSWER Requirement 1 addresses installing and maintaining network security
controls (formerly 'firewalls') to protect the CDE.
Q27: What is a firewall in the context of PCI DSS?
ANSWER A firewall is a network security system that controls incoming and
outgoing network traffic based on security rules, used to protect the CDE from
unauthorized access.
Q28: What must be documented for network security controls?
ANSWER Organizations must document configuration standards, business
justifications for all services and ports allowed, and a diagram of the network.
Q29: How often must firewall rules be reviewed?
ANSWER Firewall and router rule sets must be reviewed at least every six
months.
Q30: What does Requirement 2 address?
ANSWER Requirement 2 addresses applying secure configurations to all system
components, eliminating vendor-supplied defaults.
Q31: What are vendor-supplied defaults?
ANSWER Vendor-supplied defaults are default passwords, settings, and
configurations provided by manufacturers that must be changed before deploying a
system.
Q32: Why must vendor defaults be changed?
ANSWER Default passwords and settings are widely known and published,
making them easy targets for attackers.
Q33: What is a system configuration standard?
ANSWER A documented standard defining secure configuration settings for all
system components in the CDE, based on industry best practices.
Q34: What is a DMZ in PCI DSS context?
ANSWER A DMZ (demilitarized zone) is a network segment between the public
internet and internal network, used to host public-facing services while protecting
internal systems.
Q35: Can direct routes exist between the internet and the CDE?
PCI DSS Study Guide | Page 4
REAL QUESTIONS + DETAILED ANSWERS - LATEST VERSION - TOP
RATED (2026/2027)
Q1: What does PCI DSS stand for?
ANSWER PCI DSS stands for Payment Card Industry Data Security Standard.
Q2: Who developed PCI DSS?
ANSWER PCI DSS was developed by the Payment Card Industry Security
Standards Council (PCI SSC), founded by American Express, Discover, JCB,
Mastercard, and Visa.
Q3: When was the PCI SSC founded?
ANSWER The PCI SSC was founded in September 2006.
Q4: What is the primary goal of PCI DSS?
ANSWER The primary goal is to protect cardholder data and reduce credit card
fraud by ensuring that all companies that accept, process, store, or transmit card
payment information maintain a secure environment.
Q5: What is the current version of PCI DSS?
ANSWER PCI DSS version 4.0.1 is the current version, released in June 2024,
with full enforcement by March 31, 2025.
Q6: Who must comply with PCI DSS?
ANSWER Any organization that stores, processes, or transmits cardholder data
(CHD) or sensitive authentication data (SAD), including merchants, service
providers, and financial institutions.
Q7: What are the six goals of PCI DSS?
ANSWER 1) Build and maintain a secure network and systems, 2) Protect
cardholder data, 3) Maintain a vulnerability management program, 4) Implement
strong access control measures, 5) Regularly monitor and test networks, 6)
Maintain an information security policy.
PCI DSS Study Guide | Page 1
,Q8: How many requirements does PCI DSS v4.0 contain?
ANSWER PCI DSS v4.0 contains 12 principal requirements.
Q9: What is cardholder data (CHD)?
ANSWER Cardholder data includes the Primary Account Number (PAN),
cardholder name, expiration date, and service code.
Q10: What is sensitive authentication data (SAD)?
ANSWER SAD includes full track data (magnetic stripe or chip data),
CAV2/CVC2/CVV2/CID codes, and PINs/PIN blocks.
Q11: Can sensitive authentication data be stored after authorization?
ANSWER No. SAD must not be stored after authorization, even if encrypted.
Q12: What is the Cardholder Data Environment (CDE)?
ANSWER The CDE is the people, processes, and technology that store, process,
or transmit cardholder data or SAD, plus any systems connected to or that could
impact the security of those systems.
Q13: What is a Primary Account Number (PAN)?
ANSWER The PAN is the unique payment card number (credit or debit) that
identifies the issuer and the account.
Q14: What is PCI DSS scope?
ANSWER PCI DSS scope includes all system components included in or
connected to the CDE, as well as components that could impact the security of the
CDE.
Q15: What is network segmentation in PCI DSS?
ANSWER Network segmentation isolates the CDE from the rest of the corporate
network, reducing the scope of PCI DSS compliance requirements.
Q16: What is a merchant level in PCI DSS?
ANSWER Merchant levels (1–4) are classifications based on annual transaction
volume, determining the required validation method.
Q17: What is a Level 1 merchant?
ANSWER A Level 1 merchant processes over 6 million card transactions per year
across all channels, and requires an annual on-site audit by a QSA.
PCI DSS Study Guide | Page 2
,Q18: What is a Qualified Security Assessor (QSA)?
ANSWER A QSA is a company and individual certified by PCI SSC to perform
PCI DSS compliance assessments.
Q19: What is an Internal Security Assessor (ISA)?
ANSWER An ISA is an employee certified by PCI SSC who can perform PCI
DSS assessments for their own organization.
Q20: What is a Self-Assessment Questionnaire (SAQ)?
ANSWER An SAQ is a validation tool for eligible merchants and service
providers to self-evaluate PCI DSS compliance.
Q21: How many SAQ types are there?
ANSWER There are multiple SAQ types (A, A-EP, B, B-IP, C, C-VT, D, P2PE)
designed for different merchant environments.
Q22: What is SAQ A?
ANSWER SAQ A is for merchants who have outsourced all cardholder data
functions to PCI DSS compliant third parties and do not store, process, or transmit
CHD electronically.
Q23: What is a Report on Compliance (ROC)?
ANSWER A ROC is a detailed report documenting the results of a PCI DSS
assessment, required for Level 1 merchants.
Q24: What is an Attestation of Compliance (AOC)?
ANSWER An AOC is a document signed by a merchant or service provider and
assessor affirming the results of a PCI DSS assessment.
Q25: What are the penalties for PCI DSS non-compliance?
ANSWER Penalties can include fines from $5,000 to $100,000 per month,
increased transaction fees, card brand restrictions, and potential loss of ability to
process card payments.
Requirements 1 & 2 — Network Security
Q26: What does PCI DSS Requirement 1 address?
PCI DSS Study Guide | Page 3
, ANSWER Requirement 1 addresses installing and maintaining network security
controls (formerly 'firewalls') to protect the CDE.
Q27: What is a firewall in the context of PCI DSS?
ANSWER A firewall is a network security system that controls incoming and
outgoing network traffic based on security rules, used to protect the CDE from
unauthorized access.
Q28: What must be documented for network security controls?
ANSWER Organizations must document configuration standards, business
justifications for all services and ports allowed, and a diagram of the network.
Q29: How often must firewall rules be reviewed?
ANSWER Firewall and router rule sets must be reviewed at least every six
months.
Q30: What does Requirement 2 address?
ANSWER Requirement 2 addresses applying secure configurations to all system
components, eliminating vendor-supplied defaults.
Q31: What are vendor-supplied defaults?
ANSWER Vendor-supplied defaults are default passwords, settings, and
configurations provided by manufacturers that must be changed before deploying a
system.
Q32: Why must vendor defaults be changed?
ANSWER Default passwords and settings are widely known and published,
making them easy targets for attackers.
Q33: What is a system configuration standard?
ANSWER A documented standard defining secure configuration settings for all
system components in the CDE, based on industry best practices.
Q34: What is a DMZ in PCI DSS context?
ANSWER A DMZ (demilitarized zone) is a network segment between the public
internet and internal network, used to host public-facing services while protecting
internal systems.
Q35: Can direct routes exist between the internet and the CDE?
PCI DSS Study Guide | Page 4
