Answer
iptables does linear rule matching; IPVS uses kernel hash tables for large-scale performance.
Quick Answer
iptables mode programs a chain of rules per Service. With thousands of Services, each packet traverses potentially thousands of iptables rules sequentially — O(n) lookup. IPVS uses kernel-level hash tables for Service lookup — O(1) regardless of Service count. At 10,000+ Services, iptables mode causes measurable packet processing latency; IPVS does not.
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