A technician is called to replace a network jack that has been damaged. Which of the following tools will the technician need to complete this task?

A toner probe is used to trace and locate cables within walls or patch panels, not to terminate or replace connectors.

A multimeter measures electrical properties such as voltage, current, and resistance, but is not used for physically installing or terminating network connectors.

A loopback plug is used to test a network port by redirecting its own signal back to itself to verify functionality, not for replacing hardware.

A crimper is used to physically attach an RJ-45 connector to the end of a twisted-pair Ethernet cable or to terminate wires into a keystone jack, which is the core task when replacing a damaged network jack. Without a crimper, the technician cannot properly secure the conductor wires to the connector's contacts.