Distributed Databases
Storing a separate copy of the database at multiple locations is which of the following?

Vertical Partitioning
Horizontal and Vertical Partitioning
Horizontal Partitioning
Data Replication

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Distributed Databases
Which of the following is a disadvantage of replication?

Reduced network traffic
Each site must have the same storage capacity.
If the database fails at one site, a copy can be located at another site.
Each transaction may proceed without coordination across the network.

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