Distributed Databases
Replication should be used when which of the following exist?

All of these
When transmission speeds and capacity in a network prohibit frequent refreshing of large tables.
The application's data can be somewhat out-of-date.
When using many nodes with different operating systems and DBMSs and database designs.

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

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

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