Informix Single-Tier
The Single-Tier ODBC Drivers for Informix are a single component
installed on a data-consuming machine - depending on the architecture in
which the driver is deployed, either a client such as a desktop, a
workstation or an application-server machine. No components need be
installed on the database server.
The OpenLink Single-Tier Drivers for Informix are a Type A class of
driver developed using the Informix ESQL/C call level interface and assumes
the prior installation of the Informix Connect software for the target
Informix Server release.