CAS-004 Security Operations Practice Question
Which of the following is a key benefit of using an Extended Detection and Response (XDR) solution over traditional Endpoint Detection and Response (EDR)?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
XDR provides centralized visibility across multiple security layers including endpoints, network, and cloud
XDR extends detection beyond endpoints to include network, email, cloud, and other data sources, providing broader visibility and correlation across the entire environment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
XDR only works with a single vendor's products
Why it's wrong here
XDR is defined by cross-vendor telemetry integration, so single-vendor limitation contradicts its purpose. It is tempting because some XDR platforms are strongest within one ecosystem, and it would be correct if the question described a proprietary, vendor-locked detection suite rather than XDR generally.
- ✗
XDR eliminates the need for SIEM and SOAR systems
Why it's wrong here
XDR correlates telemetry across endpoint, network, identity and cloud, but it does not replace SIEM or SOAR; those retain log aggregation and orchestrated response roles. It is tempting because XDR absorbs some detection and automated-response duties, and it would be correct only if the question asked which capability XDR overlaps with rather than eliminates.
- ✗
XDR only focuses on network traffic analysis
Why it's wrong here
XDR ingests endpoint, identity, email and cloud telemetry, not network traffic alone, so this misstates its scope. It is tempting because network detection and response is one contributing source, and it would be the correct description if the question concerned NDR specifically rather than XDR.
- ✓
XDR provides centralized visibility across multiple security layers including endpoints, network, and cloud
Why this is correct
XDR natively ingests and correlates telemetry from endpoints, network, cloud and identity into one console, satisfying the stem's cross-layer visibility requirement. EDR's scope stops at the endpoint agent, so it cannot surface network or cloud signals. This broader correlation is the defining architectural difference between the two.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.