How Does Patching Switch OS, Servers, and Endpoint Definitions Prevent Attacks?
An engineer has ensured that the switches are using the latest OS, the servers have the latest patches, and the endpoints' definitions are up to date. Which of the following will these actions most effectively prevent?
Community Votes
100% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
The question tests whether routine patching and signature updates map to known exploits; the trap is assuming latest definitions stop zero-days or that updates eliminate insider and lifecycle risk.
Patching switch OS, server OS, and endpoint definitions closes vulnerabilities that already have fixes. This page establishes that those update actions most directly prevent known exploits (D), not zero-day attacks, insider threats, or end-of-life support.
Choosing zero-day attacks because updates sound like broad protection. Zero-days by definition lack a vendor patch or detection signature, so updating systems cannot prevent them.
Community Discussion (4 comments)
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Expert Analysis
Why the Answer Is Correct
Keeping the switch OS, server patches, and endpoint definitions current addresses vulnerabilities that vendors have already documented and fixed. That is the definition of a known exploit: an attacker leverages a public CVE, vendor advisory, or signature-detectable flaw for which a patch or update exists. By applying those updates, the engineer removes the exposure before an attacker can use the known technique. Therefore D, known exploits, is the action most effectively prevented.Why the Other Options Are Wrong
A is wrong because zero-day attacks target flaws with no available patch, signature, or vendor fix, so updating to the latest OS and definitions cannot reliably prevent them. B is wrong because insider threats involve authorized users misusing access; patching does not address intent, permissions, or data exfiltration by a trusted employee. C is wrong because end-of-life support is a vendor lifecycle decision; installing current patches may delay risk but does not force a vendor to continue supporting a product. Also, the scenario specifically lists updates and definitions, which map to known vulnerability remediation, not to personnel or lifecycle governance.Community Comment Notes
jbmac and ojones888 both argue that updates address vulnerabilities that have already been identified and patched, which matches the known-exploit answer. As 9149f41 summarized, a zero-day has 'No patch exists yet', so the update actions cannot be aimed at zero-days. jennyka76 dissented by choosing zero-day attacks, but that reasoning overlooks the lack of a fix at day zero. The vote distribution and the technical comments align on D, known exploits.Official Reference
Exam Strategy
When a question lists OS updates, patches, and signature/definition updates, map those actions to vulnerabilities that already have fixes. Eliminate zero-day options immediately because no patch exists on day zero, and do not confuse patching with insider-risk or vendor-support decisions.
Frequently Asked Questions
Why can't the latest OS, patches, and definitions prevent zero-day attacks?
A zero-day is exploited before a vendor fix or detection signature exists, so there is nothing for the engineer to deploy on day zero.
Why is end-of-life support not prevented by keeping systems updated?
EOL is a vendor lifecycle milestone; updates reduce known vulnerabilities but do not obligate the vendor to keep supporting the hardware or software.
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