Understanding Cisco Cybersecurity Fundamentals (SECFND, legacy) — Question 40

Why are reputation filters typically the first filters that are applied to inbound emails in content security systems?

Answer options

• A. to remove spam messages, which use SMTP server resources.
• B. These filters are the most complicated to run so they are executed first to conserve CPU resources.
• C. to reduce the processing load on other filters by eliminating emails from known bad sources.
• D. to reduce the processing load on other filters by eliminating emails from known bad sources.

Correct answer: C

Explanation

Reputation filters are designed to identify and block emails from known malicious sources, which helps in minimizing the number of unwanted emails that reach other filtering stages. This reduces the overall processing load on subsequent filters, allowing them to operate more efficiently. The other options either misrepresent the purpose of reputation filters or incorrectly suggest they are more complex than they truly are.