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

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

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Distributed Databases
An autonomous homogenous environment is which of the following?

The same DBMS is at each node and a central DBMS coordinates database access.
A different DBMS is at each node and a central DBMS coordinates database access.
The same DBMS is at each node and each DBMS works independently.
A different DBMS is at each node and each DBMS works independently.

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

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The application's data can be somewhat out-of-date.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

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