You are the Administrator in charge of the Certkiller servers and are in the process of configuring a external backplane which will be equipped with fibre channel technology, you want to know from the new Certkiller trainee which of the following fibre channel cables can be used for short distance connections spanning over few meters?

A.
Simplex

B.
Single-mode

C.
Duplex

D.
Multimode

Explanation:
The multimode cables are Fibre Channel cables that are used for short distance connections spanning over few meters.
Incorrect Answers:
A: Simplex cables are fiber cables which allows only one-way data transfer.

B: Single-mode cables are used for longer-distance applications.
D: Duplex cables allow simultaneous, bidirectional data transfers and permits devices to simultaneously send and receive data.
Reference:
Server+ Exam Cram 2 (Exam SK0-002), Charles J. Brooks, Que, November 2005, pg 204. pg 205