CompTIA Network+ Question B-98

While troubleshooting a network outage, a technician finds a 100-meter fiber cable with a small service loop and suspects it might be the cause of the outage. Which of the following is MOST likely the issue?

A. Maximum cable length exceeded
B. Dirty connectors
C. RF interference caused by impedance mismatch
D. Bend radius exceeded

Correct Answer: D

Explanation:
The excessive bending of fiber-optic cables can increase microbending and macrobending losses. Microbending causes light attenuation induced by deformation of the fiber, while macrobending causes the leakage of light through the fiber cladding and this is more likely to happen where the fiber is excessively bent.

CompTIA Network+ Question A-37

Jane, a network technician, has just installed a fiber switch in a datacenter. To run the fiber cabling, Jane plans the cable route over the top of the rack using the cable trays, down to the switch, coiling up any excess cable. As Jane configures the switch, she notices several messages in the logging buffer stating the receive signal of the SFP is too weak. Which of the following is MOST likely the cause of the errors in the logging buffer?

A. Bend radius exceeded
B. Fiber cable mismatch
C. Fiber type mismatch
D. Bad fiber switch

Correct Answer: A