Quick Answer
The answer is input validation testing, session management testing, and authentication testing. Input validation testing is correct because it directly addresses common web application attacks such as SQL injection, cross-site scripting (XSS), and command injection by ensuring all user-supplied data is properly sanitized, validated, and encoded before processing—a foundational control from the OWASP Top 10. Session management testing verifies that tokens, cookies, and timeouts prevent session hijacking or fixation, while authentication testing ensures mechanisms like multi-factor authentication resist brute force and credential stuffing. On the CISSP exam, this question tests the domain of Software Development Security, often appearing as a scenario where you must distinguish essential web application security testing types from less critical ones like load testing. A common trap is choosing “encryption testing” instead of session management, but remember that encryption is a broader control, not a testing type. Memory tip: think “ISA” for Input, Session, Authentication—the three pillars of web app defense.
This CISSP practice question tests your understanding of security assessment and testing. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
During a security assessment, an organization wants to ensure that its web application is resistant to common attacks. Which THREE testing types should be included?
Input validation testing
Identifies injection and XSS vulnerabilities.
Network segmentation testing
Why wrong: Related to infrastructure, not application.
Load testing
Why wrong: Performance, not security testing.
Authentication testing
Ensures proper access controls.
Session management testing
Prevents session hijacking.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Input validation testing
Input validation testing (A) is correct because it directly addresses common web application attacks such as SQL injection, cross-site scripting (XSS), and command injection by ensuring that all user-supplied data is properly sanitized, validated, and encoded before processing. Without rigorous input validation, an attacker can manipulate input fields to execute arbitrary code or access unauthorized data, making this a foundational security control in the OWASP Top 10.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Input validation testing
Why this is correct
Identifies injection and XSS vulnerabilities.
Related concept
Read the scenario before looking for a memorised answer.
Network segmentation testing
Why it's wrong here
Related to infrastructure, not application.
Load testing
Why it's wrong here
Performance, not security testing.
Authentication testing
Why this is correct
Ensures proper access controls.
Related concept
Read the scenario before looking for a memorised answer.
Session management testing
Why this is correct
Prevents session hijacking.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
ISC2 often tests the distinction between security testing types and operational or performance testing, so candidates mistakenly choose load testing because they confuse 'resistance to attacks' with 'resistance to high traffic' (e.g., DDoS), but load testing does not assess application-layer vulnerabilities.
Detailed technical explanation
Input validation testing often involves both client-side and server-side checks, but server-side validation is critical because client-side controls can be bypassed using tools like Burp Suite or cURL. Authentication testing verifies mechanisms such as password policies, multi-factor authentication (MFA), and session token strength, while session management testing checks for flaws like predictable tokens, improper logout, or session fixation (RFC 6265). These three testing types align with the OWASP Application Security Verification Standard (ASVS) levels for web application security.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
What to study next
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FAQ
Security Assessment and Testing — This question tests Security Assessment and Testing — Read the scenario before looking for a memorised answer..
The correct answer is: Input validation testing — Input validation testing (A) is correct because it directly addresses common web application attacks such as SQL injection, cross-site scripting (XSS), and command injection by ensuring that all user-supplied data is properly sanitized, validated, and encoded before processing. Without rigorous input validation, an attacker can manipulate input fields to execute arbitrary code or access unauthorized data, making this a foundational security control in the OWASP Top 10.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CISSP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CISSP exam.
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