ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question
While reviewing a company's layered security architecture, you discover that the perimeter firewall, web application firewall, and endpoint security agents are all purchased from the same vendor. Which change would most directly enhance technical diversity within this defensive stack?
Add a second gateway from the same vendor in transparent bridge mode in front of the current firewall.
Integrate all security products into a single vendor-supplied management console for streamlined administration.
Replace the endpoint security agents with a product from a different vendor that uses an independent detection engine.
Enable high-availability clustering on the existing firewall appliances to eliminate single points of failure.
Technical diversity seeks to reduce the likelihood that a single vulnerability or misconfiguration will compromise multiple layers of defense simultaneously. Replacing the endpoint security agents with a comparable product from another vendor introduces heterogeneous technology and independent code bases at one of the key control layers (the endpoint). This breaks the monoculture and limits common-mode failures. Simply clustering the existing firewalls, adding another identical gateway, or consolidating management only add redundancy or administrative convenience; they do not diversify the underlying technology and therefore do not strengthen defense in depth against vendor-specific flaws.
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Why is technical diversity important in layered security architecture?
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What is an endpoint security agent and its role in security architecture?
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What is a monoculture in security, and why is it risky?
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ISC2 Certified Secure Software Lifecycle Professional (CSSLP)
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