Which of the following allows the management controller device to monitor the operation of the server board’s field-replaceable units (FRUs)?

A.
Server Management Bus (SMB).

B.
Intelligent Platform Management Bus (IPMB).

C.
All of the above

D.
None of the above

Explanation:
The Server Management Bus (SMB) provides communication between the management controller and all managed components, and allows the management controller to monitor the operation of the server board’s field-replaceable units (FRUs), and monitor the temperatures of the system processors.
Incorrect
Answers:
B: The Intelligent Platform Management Bus (IPMB) connects the management controller to non-volatile memory devices which store information on the installed FRUs

that must be available for checking.
C, D: SMB is the correct answer.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 421-422.