Rules to a a Windows Domain Trus

If I want to establish a Windows Domain trust must the functional levels of each domain be the same?  E.g I have three domains two of which are functional level 2003 and the other is 2008.
DHPBilcareAsked:
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Thomas GrassiSystems AdministratorCommented:
As long as your 2003 domain controllers are at 2003 functional level they will work with 2008 and 2012

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Windows Networking

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