Cisco CCNA mock exam questions sample test – Question 208

.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


Correct Answer: C

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