Which server holds the .

on a UCCE environment, the server that holds the .wav files is the Media Server. 

The server that holds the.wavfiles in a UCCE environment is D. Media Server. The Media Server stores and serves audio files (such as music on hold, IVR prompts, and announcements) used in the contact center. These files are accessed by various components within the UCCE environment, such as the VXML Gateway and CVP, to provide audio content to callers.References:Cisco Unified CCE documentation, particularly sections related to media resources and VXML applications, details the role of the Media Server in storing and delivering audio content within the contact center environment.