Question

question 59 of 93
which of the following is true about rfi?
rfi is caused by nearby devices, such as cordless phones or microwave ovens.
unshielded twisted - pair cables and fiber optic cables can protect rfi signals.
you can reduce rfi by using a wireless networking standard that operates in the 2.4 ghz range.
rfi is caused by motors, machinery, and fluorescent lights.

Explanation:

RFI (Radio - Frequency Interference) can be caused by motors, machinery, and fluorescent lights as these devices can generate electromagnetic fields that interfere with radio - frequency signals. Cordless phones and microwaves cause different types of interference. Unshielded twisted - pair cables do not protect RFI signals, and using a 2.4 GHz wireless networking standard does not reduce RFI but may be affected by it.

Answer:

RFI is caused by motors, machinery, and fluorescent lights.