How to get SQL Server Info(Version/SP Version/Server Statistics) from a network.

Does anyone know how to get SQL Server versions, Service pack versions
and the Server that instance of SQL is running on a network. I have
seen some threads on how to list SQL servers in a network but I need to
find more info about these SQL servers.

Any help appreciated..!
Thx...SELECT @.@.VERSION

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Regards Bagieta
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