This 350-701 practice question tests your understanding of content security. 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.
A company wants to prevent sensitive data such as credit card numbers from being sent via email. Which Cisco ESA feature should be enabled?
Anti-Spam
Why wrong: Anti-spam filters unsolicited bulk email, not sensitive content.
Secure/Multipurpose Internet Mail Extensions (S/MIME)
Why wrong: S/MIME provides encryption and signing, not content inspection.
Data Loss Prevention (DLP)
DLP scans email content for sensitive data patterns.
Anti-Malware
Why wrong: Anti-malware detects viruses, not sensitive data.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Data Loss Prevention (DLP)
C is correct because Data Loss Prevention (DLP) is the Cisco ESA feature specifically designed to inspect email content and attachments for sensitive data patterns, such as credit card numbers, and enforce policies to prevent their unauthorized transmission. DLP uses predefined or custom dictionaries and message filters to detect and block or quarantine such data, directly addressing the requirement to prevent sensitive data from being sent via email.
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.
Anti-Spam
Why it's wrong here
Anti-spam filters unsolicited bulk email, not sensitive content.
Secure/Multipurpose Internet Mail Extensions (S/MIME)
Why it's wrong here
S/MIME provides encryption and signing, not content inspection.
Data Loss Prevention (DLP)
Why this is correct
DLP scans email content for sensitive data patterns.
Related concept
Read the scenario before looking for a memorised answer.
Anti-Malware
Why it's wrong here
Anti-malware detects viruses, not sensitive data.
Common exam traps
Cisco often tests the distinction between security features that protect against external threats (Anti-Spam, Anti-Malware) versus those that control internal data leakage (DLP), leading candidates to confuse content inspection for malicious intent with content inspection for sensitive data.
Detailed technical explanation
Cisco ESA DLP operates by applying content filters that use regular expressions and dictionary-based matching against data patterns like credit card numbers (Luhn algorithm validation) or Social Security numbers. It can also integrate with Cisco's DLP cloud service for more advanced policy templates and contextual analysis. In a real-world scenario, DLP can be configured to quarantine emails containing credit card numbers and notify the sender or compliance officer, ensuring regulatory compliance (e.g., PCI DSS).
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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Content Security — study guide chapter
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FAQ
Content Security — This question tests Content Security — Read the scenario before looking for a memorised answer..
The correct answer is: Data Loss Prevention (DLP) — C is correct because Data Loss Prevention (DLP) is the Cisco ESA feature specifically designed to inspect email content and attachments for sensitive data patterns, such as credit card numbers, and enforce policies to prevent their unauthorized transmission. DLP uses predefined or custom dictionaries and message filters to detect and block or quarantine such data, directly addressing the requirement to prevent sensitive data from being sent via email.
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 25, 2026
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