In the context of Cisco Customer Voice Portal (CVP), two default Call Studio VXML applications that could be modified are:A.CallbackEntry:This application handles the initial interaction with callers when they choose to use a callback feature, collecting necessary information and initiating the callback process.E.CallbackQueue:This application manages the queuing logic for callbacks, ensuring that callback requests are processed in an orderly manner and according to predefined rules and priorities.References:Cisco CVP and Call Studio documentation provide insights into the default VXML applications, including CallbackEntry and CallbackQueue, and how they can be customized or modified to meet specific Contact Center requirements.