Troubleshooting Server Network Connectivity Issues
Question
After a server outage, a technician discovers that a physically damaged fiber cable appears to be the problem.
After replacing the cable, the server will still not connect to the network.
Upon inspecting the cable at the server end, the technician discovers light can be seen through one of the two fiber strands.
Which of the following should the technician do FIRST to reconnect the server to the network?
A.
Reverse the fiber strands of the cable and reconnect them to the server B.
Use a TDR to test both strands of a new replacement cable prior to connecting it to the server C.
Replace the server's single-mode fiber cable with multimode fiber D.
Move the fiber cable to different port on the switch where both strands function.
A.
Explanations
After a server outage, a technician discovers that a physically damaged fiber cable appears to be the problem.
After replacing the cable, the server will still not connect to the network.
Upon inspecting the cable at the server end, the technician discovers light can be seen through one of the two fiber strands.
Which of the following should the technician do FIRST to reconnect the server to the network?
A.
Reverse the fiber strands of the cable and reconnect them to the server
B.
Use a TDR to test both strands of a new replacement cable prior to connecting it to the server
C.
Replace the server's single-mode fiber cable with multimode fiber
D.
Move the fiber cable to different port on the switch where both strands function.
A.
In this scenario, the technician has discovered that a physically damaged fiber cable was the cause of the server's outage. After replacing the damaged cable, the server still cannot connect to the network, and the technician finds that one of the two fiber strands is allowing light to pass through.
Given this situation, the technician should FIRST reverse the fiber strands of the cable and reconnect them to the server (option A). Reversing the fiber strands of the cable may resolve the connectivity issue, as it is possible that the fibers were not correctly aligned during the initial cable installation or cable replacement. Reversing the fiber strands will allow the fibers to align properly, which should reestablish connectivity.
Using a Time-Domain Reflectometer (TDR) to test both strands of a new replacement cable prior to connecting it to the server (option B) is a valid step in cable installation and troubleshooting but would not be the FIRST step in this scenario. Similarly, replacing the server's single-mode fiber cable with multimode fiber (option C) is not necessary in this scenario, as the issue is likely related to the cable installation rather than a compatibility issue. Finally, moving the fiber cable to a different port on the switch where both strands function (option D) may be a valid step in troubleshooting, but it does not address the root cause of the issue, which is likely related to the cable installation.
In summary, the technician should FIRST reverse the fiber strands of the cable and reconnect them to the server (option A) to attempt to restore network connectivity.
