KCSA Kubernetes Threat Model Practice Question
A security engineer is performing a threat analysis on a Kubernetes cluster and identifies a risk where a compromised container can exhaust the available CPU and memory on the underlying worker node, causing a denial of service for other tenants. Which native Kubernetes admission mechanism is specifically designed to mitigate this threat vector?
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
✓
LimitRanger
LimitRanger enforces resource allocation limits (min/max) for pods and containers in a namespace, preventing runaway resource consumption that leads to node starvation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
PodSecurityStandards
Why it's wrong here
PodSecurityStandards enforce security contexts such as privilege escalation and root user execution, not resource limits.
- ✗
ValidatingWebhookConfiguration
Why it's wrong here
While custom webhooks can check resources, LimitRanger is the built-in admission controller purpose-built for resource constraints.
- ✓
LimitRanger
Why this is correct
Correct. LimitRanger sets compute resource constraints per pod or container in a namespace to prevent resource exhaustion.
- ✗
NetworkPolicy
Why it's wrong here
NetworkPolicy controls layer 3/4 network traffic between pods, not node-level compute resource consumption.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation 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 KCSA exam.