Answer
Different plugins vary in route programming and IP management; poor choice bottlenecks scaling.
Quick Answer
CNI plugins handle networking for every Pod on every node. Some CNI plugins (Flannel with VXLAN, Weave) use userspace components that add CPU overhead per packet. At large scale, the cumulative networking overhead affects control-plane node performance too. eBPF-based CNIs (Cilium) bypass iptables and userspace entirely, scaling better for large clusters.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ