Which three NTP features can be deduced on the router?

Refer to Exhibit:

Which three NTP features can be deduced on the router? (choose three)
A . only accepts time requests from 192.168.1.1
B . only handle four requests at a time
C . only is in stratum 4
D . only updates its time from 192.168.1.1
E . only accepts time requests from 192.168.1.4
F . only updates its time from 192.168.1.4

View Answer

Answer: ACF

Explanation:

IOS router defines the following four types of access for NTP:

1) Peer C permits router to respond to NTP requests and accept NTP updates. NTP control queriesare also accepted. This is the only class which allows a router to be synchronized by otherdevices.

2) Serve C permits router to reply to NTP requests, but rejects NTP updates (e.g. replies from aserver or update packets from a peer). Control queries are also permitted.

3) Serve-only C permits router to respond to NTP requests only. Rejects attempt to synchronize local system time, and does not access control queries.

4) Query-only C only accepts NTP control queries. No response to NTP requests are sent, and no local system time synchronization with remote system is permitted.