You are the Administrator in charge of the Certkiller servers and are in the process of configuring a external SCSI backplane which will be equipped with external SCSI drives, you want to know from the new Certkiller trainee how much external devices can SCSI-3 handle?

A.
12

B.
9

C.
45

D.
7

Explanation:
The SCSI-3 is well documented and known to be capable of handling 45 devices -1 for the first hard drive.
Incorrect Answers:
A, B, C: The other mentioned numbers of devices are not the proper number of devices which SCSI-1 is capable of handling.
Reference:

Server+ Exam Cram 2 (Exam SK0-002), Charles J. Brooks, Que, November 2005, pg