What is the purpose of a media tester?

The purpose of a media tester is to assess the functionality of a cable, ensuring that it operates as intended and can support the required data transmission. This tool checks for various issues such as continuity, signal integrity, and can identify faults like breaks, shorts, or miswiring in the cable. By confirming that the cable meets operational standards, a media tester helps technicians ensure reliable network performance and connectivity.

Other options present different functions not associated with a media tester. Amplifying signals is related to devices like signal boosters or amplifiers, while certifying network speed involves testing equipment that evaluates data transfer rates, not simply the functionality of the physical cable. Lastly, visually inspecting connector types is a preliminary task that does not involve testing the cable's performance or function, which falls outside the primary role of a media tester.