76.
Many server applications depend on time synchronization. For some services,
synchronized time is not that essential. Which of the following services
will experience problems when time synchronization has been lost?
- A.DNS
- B.Kerberos
- C.LDAP authentication
- D.Database synchronization
- Answer & Explanation
- Report
Answer : [B, D]
Explanation :
Explanation :
| Explanation: In Kerberos, authentication tickets are handed out. These authentication tickets depend on time being correctly synchronized, and only a limited difference between clocks is accepted. The same is true for database synchronization. |
77.
If your RHEL 7 service is running IPA, which service takes care of time
synchronization?
- A.timedatectl
- B.ntpd
- C.hwclock
- D.chronyd
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| IPA uses an integrated ntpd time server. chronyd normally is the default service on RHEL. Answers A and C are incorrect because timedatectl and hwclock are commands to manage time, not services. |
78.
Which service is used as the default service to synchronize time on RHEL 7?
- A.timedatectl
- B.ntpd
- C.hwclock
- D.chronyd
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| chronyd is the default service to synchronize time on RHEL 7. |
79.
Which stratum is typical for a server that has established successful synchronization
with an Internet time server?
- A.1
- B.3
- C.7
- D.10
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| A server that has established successful synchronization with an Internet time server typically would show a low stratum, somewhere between 2 and 5. Not 1, because that is for servers that are directly connected to a very reliable clock. Not 7, because that means there are many other servers between this server and the time source. Not 10, because that is the default stratum for a server that uses its local clock for synchronization. |
80.
What is the name of the chronyd configuration file?
- A./etc/chrony/chrony.conf
- B./etc/chrony.d/chronyd.conf
- C./etc/chronyd.d/chronyd.conf
- D./etc/chrony.conf
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The name of the chrony configuration file is /etc/chrony.conf. |
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