HSD Customer Service Practice Test

Tightening all connections and adding 75-ohm terminators is effective in reducing impulse noise because these actions directly address the potential entry points of interference within the network.

Impulse noise often stems from poor connections or unterminated lines that can pick up stray signals or electrical interference. By tightening connections, you ensure that they are secure, reducing the likelihood of physical disconnections or intermittent connections that can lead to noise. Additionally, adding 75-ohm terminators minimizes reflections in the signal, which can also contribute to impulse noise. Proper termination ensures that the signal is absorbed rather than reflected back into the system, which can create disturbances and degrade performance.

The other choices do not specifically target the causes of impulse noise. For instance, installing more amplifiers might enhance signal strength but does not address the root issues causing impulse noise, while replacing drop cables could be unnecessary if connections are not secure. Using higher frequency signals may actually exacerbate noise issues if the underlying problems with connections are not solved. Thus, option B correctly identifies the most pertinent actions to mitigate impulse noise in a network.