Review Questions
247
A.
Global config
B.
Interface config
C.
Setup
D.
User mode
25.
What layer of the OSI model would you assume the problem is in if you
type show interface serial 1 and receive the following message?
Serial1 is a down, line protocol is down
A.
Physical layer
B.
Data Link layer
C.
Network layer
D.
None; it is a router problem.
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