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 TWO tools can be used to directly interact with a container runtime on a Kubernetes node without using kubectl?
systemctl
Why wrong: systemctl manages systemd services, not containers.
kubectl
Why wrong: kubectl interacts with the API server, not directly with the container runtime.
ctr
ctr is a CLI for containerd.
docker
Why wrong: docker is used if the runtime is Docker, but not always available or recommended.
crictl
crictl is a CLI for CRI-compatible runtimes.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ctr
crictl and ctr are CLI tools for interacting with CRI-compatible container runtimes. kubectl and docker are not available on nodes by default; docker is not always the runtime.
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
For each option: why learners choose it and why it is or isn't the right answer here.
systemctl
Why it's wrong here
systemctl manages systemd services, not containers.
kubectl
Why it's wrong here
kubectl interacts with the API server, not directly with the container runtime.
ctr
Why this is correct
ctr is a CLI for containerd.
Related concept
Static NAT maps one inside address to one outside address.
docker
Why it's wrong here
docker is used if the runtime is Docker, but not always available or recommended.
crictl
Why this is correct
crictl is a CLI for CRI-compatible runtimes.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
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
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.
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
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.
What to study next
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 CKS NAT questions on configuration and troubleshooting.
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FAQ
Monitoring, Logging and Runtime Security — This question tests Monitoring, Logging and Runtime Security — Static NAT maps one inside address to one outside address..
The correct answer is: ctr — crictl and ctr are CLI tools for interacting with CRI-compatible container runtimes. kubectl and docker are not available on nodes by default; docker is not always the runtime.
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 CKS NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 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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