[SANS SEC401 MODULE PAPER 2026] – QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS |
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Core Domains
Network Security and Architecture
Cloud Security and Virtualization
Access Control and Identity Management
Cryptography and Data Protection
Security Operations and Monitoring
Wireless Security
Threat Intelligence and Vulnerability Management
Incident Response and Business Continuity
Introduction
This examination is designed to comprehensively assess a candidate's mastery of the foundational principles and
practical applications of information security as covered in the SANS SEC401 curriculum. It evaluates a deep
understanding of core domains including network architecture, cloud security, access control, cryptography, and security
operations. The questions are structured to test not only theoretical knowledge but also the ability to apply critical
thinking and decision-making skills to real-world scenarios and complex problems. Successful completion of this exam
demonstrates a candidate's readiness to identify, analyze, and mitigate security risks in a professional environment,
ensuring they possess the essential skills required for effective security management.
,SECTION ONE: QUESTIONS 1 – 100
Question 1
Which of the following is true regarding a TCP/IP packet being generated as it travels down the stack?
A. Each layer removes the previous header and adds its own.
B. The packet directly connects to the peer layer on the target device.
C. Each layer removes a header.
D. Each layer adds a header.
🟢D
🔴 Explanation: As data travels down the TCP/IP stack, each layer encapsulates the data by adding its own header.
This process is known as encapsulation. The data does not connect directly to the peer layer, nor do headers get
removed until they are processed on the receiving end.
Question 2
Threat enumeration is a part of the overall concept known as threat intelligence, which helps to understand the TTP
of adversaries. Which of the TTPs is a high-level description?
A. Procedures
B. Tools
C. Techniques
D. Tactics
🟢D
,🔴 Explanation: In the TTP framework, "Tactics" represent the highest level of description, detailing the adversary's
strategic goals and motivations. "Techniques" and "Procedures" are more granular, specific descriptions of how
those goals are achieved.
Question 3
Which of the following IEEE 802.11 amendments was created to deliver the feature set required to handle the
upcoming strain that will be put on WLAN?
A. 802.11n
B. 802.11ac
C. 802.11ax
D. 802.11bg
🟢C
🔴 Explanation: 802.11ax, also known as Wi-Fi 6, was specifically designed to address the growing strain on wireless
networks by improving efficiency, capacity, and performance in dense environments.
Question 4
Which of the following IEEE 802.11 amendments currently operates in the 5 GHz frequency range and allows for a
minimum of 1 Gbps bandwidth in a multi-link scenario?
A. 802.11ac
B. 802.11ax
C. 802.11n
D. 802.11bg
, 🟢A
🔴 Explanation: 802.11ac (Wi-Fi 5) operates in the 5 GHz band and can achieve multi-link speeds of at least 1 Gbps.
802.11ax also uses 5 GHz (and 2.4 GHz) but is a newer standard designed for higher efficiency, while 802.11n and
802.11bg operate at lower speeds.
Question 5
Which part of IEEE 802 specifically defines the set of protocols for implementing wireless local area networks?
A. IEEE 802.1
B. IEEE 802.1x
C. IEEE 802.3
D. IEEE 802.11
🟢D
🔴 Explanation: The IEEE 802.11 standard is the set of protocols that defines how wireless local area networks
(WLANs) operate. IEEE 802.3 defines Ethernet, and IEEE 802.1 and 802.1x relate to network management and port-
based authentication.
Question 6
Which of the following TCP packet flags indicates that a connection is being shut down in a graceful fashion?
A. URG
B. ACK
C. RST
D. FIN
PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Core Domains
Network Security and Architecture
Cloud Security and Virtualization
Access Control and Identity Management
Cryptography and Data Protection
Security Operations and Monitoring
Wireless Security
Threat Intelligence and Vulnerability Management
Incident Response and Business Continuity
Introduction
This examination is designed to comprehensively assess a candidate's mastery of the foundational principles and
practical applications of information security as covered in the SANS SEC401 curriculum. It evaluates a deep
understanding of core domains including network architecture, cloud security, access control, cryptography, and security
operations. The questions are structured to test not only theoretical knowledge but also the ability to apply critical
thinking and decision-making skills to real-world scenarios and complex problems. Successful completion of this exam
demonstrates a candidate's readiness to identify, analyze, and mitigate security risks in a professional environment,
ensuring they possess the essential skills required for effective security management.
,SECTION ONE: QUESTIONS 1 – 100
Question 1
Which of the following is true regarding a TCP/IP packet being generated as it travels down the stack?
A. Each layer removes the previous header and adds its own.
B. The packet directly connects to the peer layer on the target device.
C. Each layer removes a header.
D. Each layer adds a header.
🟢D
🔴 Explanation: As data travels down the TCP/IP stack, each layer encapsulates the data by adding its own header.
This process is known as encapsulation. The data does not connect directly to the peer layer, nor do headers get
removed until they are processed on the receiving end.
Question 2
Threat enumeration is a part of the overall concept known as threat intelligence, which helps to understand the TTP
of adversaries. Which of the TTPs is a high-level description?
A. Procedures
B. Tools
C. Techniques
D. Tactics
🟢D
,🔴 Explanation: In the TTP framework, "Tactics" represent the highest level of description, detailing the adversary's
strategic goals and motivations. "Techniques" and "Procedures" are more granular, specific descriptions of how
those goals are achieved.
Question 3
Which of the following IEEE 802.11 amendments was created to deliver the feature set required to handle the
upcoming strain that will be put on WLAN?
A. 802.11n
B. 802.11ac
C. 802.11ax
D. 802.11bg
🟢C
🔴 Explanation: 802.11ax, also known as Wi-Fi 6, was specifically designed to address the growing strain on wireless
networks by improving efficiency, capacity, and performance in dense environments.
Question 4
Which of the following IEEE 802.11 amendments currently operates in the 5 GHz frequency range and allows for a
minimum of 1 Gbps bandwidth in a multi-link scenario?
A. 802.11ac
B. 802.11ax
C. 802.11n
D. 802.11bg
, 🟢A
🔴 Explanation: 802.11ac (Wi-Fi 5) operates in the 5 GHz band and can achieve multi-link speeds of at least 1 Gbps.
802.11ax also uses 5 GHz (and 2.4 GHz) but is a newer standard designed for higher efficiency, while 802.11n and
802.11bg operate at lower speeds.
Question 5
Which part of IEEE 802 specifically defines the set of protocols for implementing wireless local area networks?
A. IEEE 802.1
B. IEEE 802.1x
C. IEEE 802.3
D. IEEE 802.11
🟢D
🔴 Explanation: The IEEE 802.11 standard is the set of protocols that defines how wireless local area networks
(WLANs) operate. IEEE 802.3 defines Ethernet, and IEEE 802.1 and 802.1x relate to network management and port-
based authentication.
Question 6
Which of the following TCP packet flags indicates that a connection is being shut down in a graceful fashion?
A. URG
B. ACK
C. RST
D. FIN
