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 B-11

A network administrator wants to deploy a wireless network in a location that has too much RF interference at 2.4 GHz. Which of the following standards requires the use of 5 GHz band wireless transmissions? (Select TWO)

A. 802.11a
B. 802.11ac
C. 802.11b
D. 802.11g
E. 802.11n

Correct Answer: AB

CompTIA A+ Core 2 Question C-5

After being relocated to an enclosed position under a desk, a computer experiences intermittent shutdowns. Which of the following conditions is MOST likely the cause?

A. Power surges
B. Overheating
C. APIPA addressing
D. RF interference

CompTIA A+ Question K-38

Peter, a technician, is troubleshooting an issue with a PC suddenly losing network connectivity. He has confirmed that the cable is plugged in and has swapped it with a known working cable. Peter then pings the IP address of 127.0.0.1 and receives no response. Which of the following could be the cause of the issue? (Select TWO).

A. The computer has the wrong DNS server configured.
B. The TCP drivers are corrupted.
C. The cable has been unplugged from the patch panel.
D. The routing table on the router is corrupted.
E. There is RF interference on the cable.
F. The NIC is no longer functioning properly.

Correct Answer: BF