CompTIA Network+ Practice Test

What is a common cause of crosstalk in networking?

1. Environmental interference

2. Incorrect cable length

3. Poor wiring practices

4. Outdated network devices

The correct answer is: Poor wiring practices

Crosstalk in networking is primarily caused by signals from one channel or circuit affecting another. This interference can lead to degraded performance and data loss. Poor wiring practices are a significant contributor to crosstalk as they can involve improper installation techniques such as inadequate spacing between cables, insufficient shielding, or inadequate twisting of pairs in twisted pair cabling. When cables are not installed correctly, they may run parallel to each other without adequate separation, allowing electromagnetic interference from adjacent cables to disrupt the signal integrity. This issue often occurs in environments where numerous cables are bundled together without proper management and organization. The use of poorly manufactured cables or failing to adhere to the standards for cable installation can exacerbate this problem. Although environmental interference, incorrect cable length, and outdated network devices can also impact network performance, they do not specifically relate to the concept of crosstalk in the same direct manner as poor wiring practices. Ensuring proper wiring techniques are followed is crucial to minimizing crosstalk and maintaining optimal network performance.