After performing cable work, what should be used to ensure the connections are valid?

Using a cable tester is essential after performing cable work to ensure that the connections are valid. A cable tester checks the integrity of the cable and verifies that it has been wired correctly by sending electrical signals through the cable and measuring the response at the other end. This ensures that all connectors are functional and that pinouts match the intended configuration, allowing for effective communication across the network.

A cable certifier, while useful for professional verification of cable specifications and compliance with standards, is typically more complex and expensive than necessary for basic testing after installation or repairs. Cable crimpers, on the other hand, are tools used for attaching connectors to cable ends and do not perform any testing functions. A multi-tester can measure voltage and continuity but lacks the specific functionality designed for network cable testing, making a cable tester the most appropriate choice in this context.