You configured an NTP server to use its local undisciplined clock and also an external server at address 220.127.116.11. Additionally, you created a fudge line:
server 127.127.1.0 prefer
fudge 127.127.1.0 stratum 12
What is the purpose of the fudge line?
to ensure that the NTP protocol is currently disabled
to ensure that the synchronization is checked at 12:00 P.M. each day
to make the xntpd daemon check the clients clock every 12 minutes
to ensure that the server’s local clock is seen as a stratum 12 server