Which two statements about logging are true? (Choose two.)
A. Logs can be displayed on the console or on a remote terminal.
B. The mnemonic can refer to a hardware device, a protocol, or a software module.
C. Log messages include a mnemonic that describes the message.
D. A log message can include both uptime and the datetime timestamps.
E . When you enable sequence numbers, the datetime timestamp is disabled automatically by default.
F. A log message's facility value indicates the hardware on which the log message was generated
Console logging:By default, the router sends all log messages to its console port. Hence only the users that are physically connected to the router console port can view these messages.
Terminal logging:It is similar to console logging, but it displays log messages to the router's VTY lines instead. This is not enabled by default
So terminal logging is not enabled by defaults.
The follwoing example shows part of a logging display with sequence numbers enabled:
000019: %SYS-5-CONFIG_I: Configured from console by vty2 (10.34.195.36)
So this does not have time and date stamp by default. This makes E correct answer
The part of the message preceding the percent sign depends on the setting of these global configuration commands:
service sequence-numbers service timestamps log datetime
service timestamps log datetime [localtime] [msec] [show-timezone]
service timestamps log uptime
Stamps log messages with a sequence number only if the service sequence-numbers global configuration command is configured.
Date and time of the message or event. This information appears only if theservice timestamps log [datetime | log] global configuration command is configured.
I think the spoto answer is correct C,E as both sequence and timestamp are two separate global commands
Still up for debate if anyone has a more better explanation. The tricky part here is if cisco wants correct "by default" answers.