<Dd> applications which do not require data from other sites . </Dd> <Dd> applications which do require data from other sites . </Dd> <P> A homogeneous distributed database has identical software and hardware running all databases instances, and may appear through a single interface as if it were a single database . A heterogeneous distributed database may have different hardware, operating systems, database management systems, and even data models for different databases . </P> <P> In homogeneous distributed database, all sites have identical software and are aware of each other and agree to cooperate in processing user requests . Each site surrenders part of its autonomy in terms of right to change schema or software . A homogeneous DBMS appears to the user as a single system . The homogeneous system is much easier to design and manage . The following conditions must be satisfied for homogeneous database: </P>

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