- A
NetworkPolicy: Controls network traffic to and from pods
NetworkPolicy implements network segmentation and isolation.
- B
RBAC: Controls access permissions to Kubernetes resources
RBAC manages authorization.
- C
SecurityContext: Defines privilege and security settings for pods/containers
SecurityContext sets user IDs, capabilities, etc.
- D
ServiceAccount: Encrypts secrets at rest
Why wrong: Incorrect — ServiceAccount provides identity for pods, not encryption.
- E
PodSecurityPolicy: Defines CPU and memory limits for pods
Why wrong: Incorrect — PodSecurityPolicy defines security constraints, not resource limits; resource limits are via LimitRange or ResourceQuota.
Question 984 of 997
Kubernetes Security Features: NetworkPolicy, RBAC, SecurityContext
This CKS practice question tests your understanding of minimize microservice vulnerabilities. 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.
Match each Kubernetes object or feature to its primary security purpose.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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
✓
NetworkPolicy: Controls network traffic to and from pods
Correct matches: NetworkPolicy controls network traffic; RBAC controls permissions; SecurityContext defines security settings. Common confusions: ServiceAccount is for identity, not encryption; PodSecurityPolicy is for security constraints, not resource limits.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
NetworkPolicy: Controls network traffic to and from pods
Why this is correct
NetworkPolicy implements network segmentation and isolation.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Authentication checks who the user is.
- ✓
RBAC: Controls access permissions to Kubernetes resources
Why this is correct
RBAC manages authorization.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Authentication checks who the user is.
- ✓
SecurityContext: Defines privilege and security settings for pods/containers
Why this is correct
SecurityContext sets user IDs, capabilities, etc.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Authentication checks who the user is.
- ✗
ServiceAccount: Encrypts secrets at rest
Why it's wrong here
Incorrect — ServiceAccount provides identity for pods, not encryption.
- ✗
PodSecurityPolicy: Defines CPU and memory limits for pods
Why it's wrong here
Incorrect — PodSecurityPolicy defines security constraints, not resource limits; resource limits are via LimitRange or ResourceQuota.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
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.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CKS questions on access control and AAA configuration.
- →
Minimize Microservice Vulnerabilities — study guide chapter
Learn the concepts, then practise the questions
- →
Minimize Microservice Vulnerabilities practice questions
Targeted practice on this topic area only
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FAQ
Questions learners often ask
What does this CKS question test?
Minimize Microservice Vulnerabilities — This question tests Minimize Microservice Vulnerabilities — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: NetworkPolicy: Controls network traffic to and from pods — Correct matches: NetworkPolicy controls network traffic; RBAC controls permissions; SecurityContext defines security settings. Common confusions: ServiceAccount is for identity, not encryption; PodSecurityPolicy is for security constraints, not resource limits.
What should I do if I get this CKS question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related CKS questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 11, 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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