Refer to the shown below.
%LINK-3-UPDOWN: Interface Serial0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
What statement is correct regarding the output shown in the graphic?
A. These two log messages will not have a severity level. They are not errors but are just informational messages.
B. The first log message is categorized as a warning message.
C. These messages regarding interface status are normal output and will always be displayed when you exit config mode.
D. The first log message is an error message with a severity level of 3.
https://www.cisco.com/c/en/us/td/docs/routers/access/wireless/software/guide/SysMsgLogging.html#wp1054785
Interface up or down transitions and system restart messages, displayed at the notifications level: this message is only for information; access point functionality is not affected.
A is correct
An interface up/down message is severity 3 (error). Line protocol is 5 (informational). D is correct.
Correction, 5 is notification.