CKS Monitoring Logging and Runtime Security Practice Question
This CKS practice question tests your understanding of monitoring logging and runtime security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 THREE practices help ensure the integrity and confidentiality of container logs in a Kubernetes cluster?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the log collector to use TLS when shipping logs to a central system.
Option A is correct because configuring the log collector to use TLS (e.g., Fluentd with TLS output plugin or Filebeat with SSL/TLS) encrypts log data in transit, preventing eavesdropping or tampering during shipping to a central system like Elasticsearch or Splunk. This directly protects confidentiality and integrity against man-in-the-middle attacks on the network path.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Configure the log collector to use TLS when shipping logs to a central system.
Read the scenario before looking for a memorised answer.
✓
Run log collectors in a dedicated namespace with network policies limiting access.
Why this is correct
Isolation and network policies restrict unauthorized access.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable log rotation to prevent log tampering during rotation.
Why it's wrong here
Disabling rotation causes disk full and data loss.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the misconception that disabling log rotation improves security, but in reality, rotation is a standard operational practice that does not inherently compromise integrity; the trap is confusing operational controls with security controls.
Trap categories for this question
Command / output trap
Stdout logs are not encrypted unless the container output is encrypted.
Detailed technical explanation
How to think about this question
TLS for log shipping typically uses mTLS (mutual TLS) to authenticate both the log collector and the central receiver, ensuring that only authorized collectors can send logs and that logs are encrypted with ciphers like TLS 1.3. Encryption at rest, such as S3 Server-Side Encryption (SSE-S3 or SSE-KMS), protects logs stored in object storage from unauthorized access at the storage layer, which is critical for compliance with standards like PCI-DSS or HIPAA. Network policies in a dedicated namespace (e.g., using Kubernetes NetworkPolicy with podSelector and ingress/egress rules) restrict which pods can communicate with the log collector, reducing the attack surface for log exfiltration or injection.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKS question in full detail.
Monitoring Logging and Runtime Security — This question tests Monitoring Logging and Runtime Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure the log collector to use TLS when shipping logs to a central system. — Option A is correct because configuring the log collector to use TLS (e.g., Fluentd with TLS output plugin or Filebeat with SSL/TLS) encrypts log data in transit, preventing eavesdropping or tampering during shipping to a central system like Elasticsearch or Splunk. This directly protects confidentiality and integrity against man-in-the-middle attacks on the network path.
What should I do if I get this CKS question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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