Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.
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A snapshot is a “point-in-time” copy of data on a volume. As new snapshots of the volume are made, only those bits of data that have changed from the original snapshot are duplicated. This allows a system to create instant backups on the fly without requiring a user to stop working. Snapshots take up a fraction of the space of traditional full-volume backups.