Which tool is used to create a patch cord by fixing a plug to a cable?

The tool used to create a patch cord by fixing a plug to a cable is the cable crimper. This tool is specifically designed to attach connectors, such as RJ-45 or RJ-11 plugs, to the ends of network cables. When creating a patch cord, the cable crimper compresses the metal pins within the plug onto the individual wires of the cable, establishing a secure electrical connection.

Using a cable crimper ensures that the connector is firmly attached to the cable, allowing for reliable transmission of data. This is essential for network connections, where proper continuity and signal integrity are crucial for performance. The other tools listed serve different purposes: wire strippers are used for removing insulation from wires, connector testers verify proper pin configuration and signal integrity after assembly, and punch down tools are employed to insert wires into punch-down blocks for permanent installations rather than creating patch cords.