Which device can test various types of cables including RJ-45 and coaxial?

The best choice for testing various types of cables, including RJ-45 and coaxial, is known as a cable tester. A cable tester is specifically designed to check the integrity, connectivity, and performance of different types of cables, making it well-suited for both network cables like RJ-45 (Ethernet) and coaxial cables. These testers typically can identify faults such as short circuits, open circuits, and miswired connections, helping technicians ensure that the cables are functioning correctly.

While a multi-tester can measure voltages and check continuity, it is not tailored specifically for testing the performance and integrity of various cable types in the same comprehensive manner as a dedicated cable tester. Cable certifiers are focused more on verifying the quality and compliance of installed cabling to specific standards, but they are usually more advanced and possibly more costly than simple testing needs. Cable crimpers are tools used for attaching connectors to the ends of cables and do not serve the purpose of testing cables at all.

Therefore, a cable tester is the most appropriate device for this requirement, as it provides the functionality needed to assess the different cable types effectively.