CompTIA Network+ Practice Test

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Which component of the network should be tested after installation to gauge performance?

The cable length
The Signal-to-Noise Ratio (SNR)
The cable colors
The connector type

The correct answer is: The Signal-to-Noise Ratio (SNR)

Testing the Signal-to-Noise Ratio (SNR) after installation is essential to gauge performance because SNR directly affects the quality and reliability of the transmitted data. A high SNR indicates that the signal is much stronger than the background noise, leading to better performance in network communications. This measurement is critical because it helps identify potential issues in the network that may not be evident from other tests, such as basic connectivity. Ensuring that the SNR is within acceptable limits can help prevent data corruption and enhance overall network stability. In contrast, while the cable length, cable colors, and connector type are important aspects of network installation, they do not directly measure performance or signal quality. Cable length affects maximum distances for various standards but is not a performance evaluation metric. Cable colors help in identifying and organizing cables but do not influence performance. Similarly, the type of connector does not provide insights into the efficiency or effectiveness of data transmission, thereby making SNR the most relevant choice for performance testing.