You have been asked to troubleshoot the NTP configuration of a router named R70. After executing the show
run command, you receive the following partial output of the command that shows the configuration relevant to
NTP:
clock timezone PST -8
clock summer-time PDT recurring
ntp update-calendar
ntp server 192.168.13.57
ntp server 192.168.11.58
interface Ethernet 0/0
ntp broadcast
Based on this output, which of the following statements is true?

A.
the time zone is set to 8 hours less than Pacific Standard time

B.
the router will listen for NTP broadcasts on interface E0/0

C.
the router will send NTP broadcasts on interface E0/0

D.
the router will periodically update its software clock

Explanation:
The router will send NTP broadcast on its E0/0 interface. The command ntp broadcast, when executed under
an interface, instructs the router to send NTP broadcast packets on the interface. Any devices on the network
that are set with the ntp broadcast client command on any interface will be listening for these NTP broadcasts.
While the clients will not respond in any way, they will use the information in the NTP broadcast packets to
synchronize their clocks with the information.
The time zone is not set to 8 hours less than Pacific Standard Time. The value -8 in the command clock
timezone PST -8 represents the number of hours of offset from UTC time, not from the time zone stated in the
clock timezone command.
The router will not listen for NTP broadcasts on the interface E0/0. The ntp broadcast command, when
executed under an interface, instructs the router to send NTP broadcast packets on the interface. To set the
interface to listen and use NTP broadcasts, you would execute the ntp broadcast client command on the
interface.
The router will not periodically update its software clock. The command ntp update-calendar configures the
system to update its hardware clock from the software clock at periodic intervals.
Objective:
Infrastructure Services
Sub-Objective:
Configure and verify NTP operating in a client/server mode

Basic System Management > Setting Time and Calendar Services > Configuring NTP