In IOS routers, what configuration can ensure both prevention of ntp spoofing and accurate time ensured?

Posted by: Pdfprep Category: 300-206 Tags: , ,

In IOS routers, what configuration can ensure both prevention of ntp spoofing and accurate time ensured?
A . ACL permitting udp 123 from ntp server
B . ntp authentication
C . multiple ntp servers
D . local system clock

Answer: B

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