Final answer:
To check the PECA preferences for a PWx client, one should access the configuration settings in the Power Exchange Navigator or the client's respective connection settings, where communication protocol and parameters are defined.
Step-by-step explanation:
To check the PECA (PowerExchange Client Access) preference for a PowerCenter (PWx) client, one would typically access the configuration settings within the client tool. In environments like Informatica PowerCenter, where PWx might be used for data integration tasks, these settings are often found in the PowerExchange Navigator or the respective connection objects. If the tool offers a user interface for preference management, one can navigate through the menu options to find the PECA settings section.
Sometimes these preferences can also be viewed or modified by editing configuration files, usually with the guidance of support documentation. PECA preferences are critical for defining the communication protocol and parameters to efficiently connect the client to different data sources.