Which command do you enter to display log messages with a timestamp that includes the length of time since the device was last rebooted?
A. service timestamps log uptime
B. logging facility 20
C. service timestamps debugging localtime msec
D. logging console errors
E. logging monitor 7
F. service timestamps log datetime msec
Answer A:
enables timestamps on log messages, showing the time since the system was rebooted.
https://www.cisco.com/c/en/us/td/docs/routers/access/wireless/software/guide/SysMsgLogging.html