понять это невозможно

команда net time пользуется разными протоколами, поэтому происходит цирк

C:\>net time \\192.168.80.13
Current time at \\192.168.80.13 is 07.10.2010 12:23
The command completed successfully.

C:\>net time /setsntp:192.168.80.13
The command completed successfully.

C:\>net time /querysntp
The current SNTP value is: 192.168.80.13
The command completed successfully.

C:\>net time
System error 5 has occurred.
Access is denied.