This CKA practice question tests your understanding of services and networking. 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 kube-proxy mode uses IP Virtual Server (IPVS) for load balancing and supports more algorithms than the default mode?
ipvs
IPVS mode uses IPVS and supports multiple scheduling algorithms like round-robin, least connection, etc.
userspace
Why wrong: userspace is a legacy mode with poor performance.
iptables
Why wrong: iptables is the default mode but does not support as many algorithms.
kube-proxy
Why wrong: kube-proxy is the daemon itself, not a mode.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ipvs
IPVS mode is an alternative to iptables that offers more scheduling algorithms. Option A is correct. Option B is the default iptables mode. Option C is userspace (legacy). Option D is not a mode.
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.
ipvs
Why this is correct
IPVS mode uses IPVS and supports multiple scheduling algorithms like round-robin, least connection, etc.
Related concept
Static NAT maps one inside address to one outside address.
userspace
Why it's wrong here
userspace is a legacy mode with poor performance.
iptables
Why it's wrong here
iptables is the default mode but does not support as many algorithms.
kube-proxy
Why it's wrong here
kube-proxy is the daemon itself, not a mode.
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 CKA NAT questions on configuration and troubleshooting.
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FAQ
Services and Networking — This question tests Services and Networking — Static NAT maps one inside address to one outside address..
The correct answer is: ipvs — IPVS mode is an alternative to iptables that offers more scheduling algorithms. Option A is correct. Option B is the default iptables mode. Option C is userspace (legacy). Option D is not a mode.
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 CKA 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 CKA 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 CKA exam.
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