This CKS practice question tests your understanding of system hardening. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which Pod Security Standard level allows the use of hostNetwork, hostPID, and hostIPC?
None of the above
Why wrong: Privileged is correct.
Baseline
Why wrong: Baseline restricts host namespaces.
Privileged
Privileged level allows unrestricted access to host namespaces.
Restricted
Why wrong: Restricted prohibits host namespaces.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Privileged
The Privileged Pod Security Standard (PSS) level is the most permissive, allowing unrestricted access to host-level resources, including hostNetwork, hostPID, and hostIPC. These settings grant the pod direct access to the host's network namespace, process table, and inter-process communication mechanisms, which are explicitly prohibited in the Baseline and Restricted levels. The Privileged level is designed for system-level workloads that require such elevated permissions, such as CNI plugins or monitoring agents.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
None of the above
Why it's wrong here
Privileged is correct.
Baseline
Why it's wrong here
Baseline restricts host namespaces.
Privileged
Why this is correct
Privileged level allows unrestricted access to host namespaces.
Related concept
Read the scenario before looking for a memorised answer.
Restricted
Why it's wrong here
Restricted prohibits host namespaces.
Common exam traps
CNCF often tests the misconception that Baseline allows host-level namespace sharing, when in fact Baseline only permits a limited set of non-host-level privileges, while hostNetwork, hostPID, and hostIPC are exclusive to the Privileged level.
Detailed technical explanation
Under the hood, hostNetwork: true binds the pod directly to the host's network stack, bypassing the pod network namespace, which can expose host ports and bypass network policies. hostPID allows the pod to see all host processes via /proc, enabling privilege escalation if combined with other capabilities. In real-world scenarios, a malicious workload with hostIPC could read shared memory segments used by other containers or the host, potentially leaking sensitive data like cryptographic keys.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
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FAQ
System Hardening — This question tests System Hardening — Read the scenario before looking for a memorised answer..
The correct answer is: Privileged — The Privileged Pod Security Standard (PSS) level is the most permissive, allowing unrestricted access to host-level resources, including hostNetwork, hostPID, and hostIPC. These settings grant the pod direct access to the host's network namespace, process table, and inter-process communication mechanisms, which are explicitly prohibited in the Baseline and Restricted levels. The Privileged level is designed for system-level workloads that require such elevated permissions, such as CNI plugins or monitoring agents.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CKS practice question is part of Courseiva's free CNCF 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 CKS exam.
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