Answer
Content-addressing stores each digest once and tracks references to avoid duplication.
Quick Answer
Registries use content-addressable storage: layers are stored by their SHA256 digest globally. When two images share an identical layer, only one copy is stored — any image manifest can reference it by digest. This massively reduces storage for large registries (like Docker Hub) where many images share the same base layers.
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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