What tool allows a user to identify issues such as cross pairs and split pairs effectively?

The correct choice is a cable tester, which is specifically designed to validate the integrity and configuration of a network cable. This tool checks whether the wires inside the cable are connected correctly and can identify issues like cross pairs (where wires that should be separate are incorrectly connected) and split pairs (where pairs that should be connected are misaligned). The cable tester sends signals through the cable and analyzes the return to verify continuity and pairing accuracy, ensuring that the cable conforms to networking standards.

While a cable certifier also tests cables but is generally used for more detailed testing and certification of performance standards beyond simple connectivity, it may not be the first tool a technician reaches for to identify basic wiring issues. A multi-tester can measure voltage, current, and resistance, but it is not specifically intended for testing cable connections or identifying wiring faults in network cables. Cable crimpers are used to attach connectors to the ends of cables and do not perform any testing functions. Thus, for identifying issues like cross pairs and split pairs, a cable tester is the most appropriate tool.