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# Database protocols

This section provides information on the VuGen database protocols, Oracle - 2 Tier and ODBC.

In this topic:

## Database protocols overview

VuGen creates database Vuser scripts by recording all the activity between a client and a database server. The resulting script contains functions that describe the database activity.

Suppose that you have a database of customer information that is accessed by customer service personnel located throughout the country. You use database Vusers to emulate the database server servicing many requests for information.

A database Vuser can:

- Connect to the server
- Submit an SQL query
- Retrieve and process the information
- Disconnect from the server

## Oracle - 2 Tier protocol

Oracle 2-Tier is a protocol handling communication with Oracle Database using a standard 2-tier client/server architecture.

For supported Oracle Database versions, see Supported Protocols.

Prerequisites for recording:

32-bit applications only | 32- and 64-bit applications
--- | ---
32-/64-bit operating system 32-bit Oracle client 32-bit AUTs | 64-bit operating system 32 and 64-bit Oracle client 32 and/or 64-bit AUTs

## ODBC protocol

ODBC (Open Database Connectivity) is a protocol providing a common interface for accessing databases.

For supported ODBC versions, see Supported Protocols.

Prerequisites for recording:

32-bit applications only | 32- and 64-bit applications
--- | ---
32-/64-bit operating system 32-bit ODBC driver 32-bit AUTs For recording 32- and 64-bit AUTs: | 64-bit operating system 64-bit ODBC driver 64-bit AUTs

Replay on Linux machines requires unixODBC v.2.3.1 or later.

## See also

- About Vuser scripts
- Database grids

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