This KCNA practice question tests your understanding of kubernetes fundamentals. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
You have a web application that needs to read configuration from a file and also access a database password. Which combination of resources should you use to manage these configurations securely?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use ConfigMap for configuration file and Secret for database password
ConfigMap is for non-sensitive configuration, Secret is for sensitive data like passwords.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use ConfigMap for configuration file and Secret for database password
Why this is correct
Separating concerns: ConfigMap for non-sensitive, Secret for sensitive.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use ConfigMap for both
Why it's wrong here
Storing passwords in ConfigMap is insecure; Secrets should be used for sensitive data.
✗
Use PersistentVolume for configuration and environment variables for the password
Why it's wrong here
PersistentVolume is for persistent storage, not configuration.
✗
Use Secret for both
Why it's wrong here
Secrets can hold both, but ConfigMap is more appropriate for non-sensitive config.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 KCNA question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related KCNA NAT questions on configuration and troubleshooting.
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use ConfigMap for configuration file and Secret for database password — ConfigMap is for non-sensitive configuration, Secret is for sensitive data like passwords.
What should I do if I get this KCNA question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related KCNA NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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