Distributed Databases
Some of the columns of a relation are at different sites is which of the following?

Data Replication
Vertical Partitioning
Horizontal and Vertical Partitioning
Horizontal Partitioning

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

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

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