Quick Answer
Content Disarm and Reconstruction (CDR) is the correct choice because it actively strips out potentially malicious content—such as macros, scripts, and embedded objects—from files like Office documents and PDFs, then rebuilds a clean, fully usable version. Unlike signature-based detection, CDR eliminates threats by sanitizing the file structure itself, ensuring no exploit survives while preserving the file’s original functionality. On the Fortinet NSE 7 Advanced Security NSE7 exam, this question tests your understanding of proactive threat prevention versus reactive detection; a common trap is confusing CDR with antivirus or sandboxing, which only identify threats rather than remove them. Remember the key distinction: CDR reconstructs, it does not just detect. A useful memory tip is to think of CDR as a “file sanitizer” that strips out dangerous elements like macros and scripts, then hands you a safe, usable copy—keeping the content you need while discarding the risk.
This NSE7 practice question tests your understanding of advanced threat protection. 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.
Which FortiGate security feature can reconstruct files to remove potentially malicious content while preserving the file's usability?
Antivirus outbreak prevention
Why wrong: Outbreak prevention uses signatures, not reconstruction.
Content Disarm and Reconstruction
CDR disinfects files by removing active content and rebuilding them.
FortiSandbox
Why wrong: FortiSandbox analyzes files but does not reconstruct them.
IPS application control
Why wrong: IPS focuses on network-level attacks, not file reconstruction.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Content Disarm and Reconstruction
Content Disarm and Reconstruction (CDR) is the correct answer because it actively removes potentially malicious content—such as macros, scripts, or embedded objects—from files (e.g., Office documents, PDFs) and then reconstructs a clean, usable version. Unlike detection-based approaches, CDR eliminates threats by sanitizing the file structure itself, ensuring the file remains functional for the end user while blocking exploits.
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.
Antivirus outbreak prevention
Why it's wrong here
Outbreak prevention uses signatures, not reconstruction.
Content Disarm and Reconstruction
Why this is correct
CDR disinfects files by removing active content and rebuilding them.
Related concept
Read the scenario before looking for a memorised answer.
FortiSandbox
Why it's wrong here
FortiSandbox analyzes files but does not reconstruct them.
IPS application control
Why it's wrong here
IPS focuses on network-level attacks, not file reconstruction.
Common exam traps
The trap here is that candidates often confuse FortiSandbox's detection capabilities with CDR's proactive sanitization, mistakenly thinking sandboxing can reconstruct files when it only analyzes and blocks them.
Detailed technical explanation
CDR works by parsing files into their constituent elements (e.g., XML, OLE objects, macros) and stripping out active content like VBA scripts or embedded executables, then rebuilding the file using only safe, static components. This process is performed by FortiGate's proxy-based inspection engine, which can handle formats like Microsoft Office documents, PDFs, and RTF files, ensuring the reconstructed file retains its visual layout and data integrity. In a real-world scenario, CDR is critical for blocking weaponized documents delivered via email that bypass traditional AV by using zero-day exploits in macros.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
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FAQ
Advanced Threat Protection — This question tests Advanced Threat Protection — Read the scenario before looking for a memorised answer..
The correct answer is: Content Disarm and Reconstruction — Content Disarm and Reconstruction (CDR) is the correct answer because it actively removes potentially malicious content—such as macros, scripts, or embedded objects—from files (e.g., Office documents, PDFs) and then reconstructs a clean, usable version. Unlike detection-based approaches, CDR eliminates threats by sanitizing the file structure itself, ensuring the file remains functional for the end user while blocking exploits.
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 24, 2026
This NSE7 practice question is part of Courseiva's free Fortinet 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 NSE7 exam.
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