Kennedy discovered an undocumented change in the protocol used by the Microsoft SQL Server Net-Lib component from named pipes to TCP/IP in Microsoft Data Access Components 2.6 that was fixed in the subsequent version 2.7).
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With the popular adoption of Transact-SQL, which extends SQL with such programming constructs as loops and conditional statements, this became less necessary and it was eventually deprecated in Microsoft Data Access Components version 2.7.
A part of MDAC (Microsoft Data Access Components), it provides a middleware layer between programming languages and OLE DB (a means of accessing data stores, whether databases or not, in a uniform manner).