Under certain circumstances, the Windows Media server will simulate log files or entries. Simulated logs are the result of missing or insufficient logging data received from the client. Simulated logs can be used to analyze or troubleshoot interrupted or unsuccessful streaming attempts.
Log files or events are typically simulated when the server recognizes that it should have received a log entry and didn't, for example:
Simulated log entries contain whatever server-side data is available as well as any client information that may have been transferred at the beginning of the streaming session (such as player ID and IP address).