CompTIA Server+ (SK0-005) — Question 189

A systems administrator notices a newly added server cannot see any of the LUNs on the SAN. The SAN switch and the local HBA do not display any link lights. Which of the following is most likely the issue?

Answer options

• A. A single-mode fiber cable is used in place of multimode.
• B. The switchport is on the wrong virtual SAN.
• C. The HBA driver needs to be installed on the server.
• D. The zoning on the fiber switch is wrong.

Correct answer: A

Explanation

The correct answer is A because using a single-mode fiber cable instead of multimode can prevent proper connectivity and signal transmission, resulting in no link lights. Option B is incorrect because being on the wrong virtual SAN wouldn't necessarily affect link lights. Option C is not relevant since the issue is with physical connectivity rather than software, and option D deals with zoning, which would not affect link lights directly.