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It supports heterogeneous configurations in which the primary and standby systems may have different CPU architectures, operating systems (for example, Windows & Linux), operating system binaries (32-bit/64-bit), or Oracle database binaries (32-bit/64-bit).<ref name="Data Guard Operational Prerequisites">
{{cite web
| first =
| last =
| title = Data Guard Operational Prerequisites
| url = http://docs.oracle.com/cd/E11882_01/server.112/e10700/standby.htm#i58150
| archiveurl =
| work = Data Guard Concepts and Administration
| publisher = Oracle Corporation
| date =
| year =
| month =
| archivedate =
| accessdate = 2013-08-26
| quote = As of Oracle Database 11g, Data Guard provides increased flexibility for Data Guard configurations in which the primary and standby systems may have different CPU architectures, operating systems (for example, Windows & Linux), operating system binaries (32-bit/64-bit), or Oracle database binaries (32-bit/64-bit).
}}</ref>
== Disadvantages ==
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