Atechnician has verified that a recent loss of network connectivity to multiple workstations is due
to a bad cat5 cable in the server room wall. which of the following tools can be used to locate its
physical location within the wall?
a. cable certifier
b. multimeter
c. cable tester
d. toner probe

D. Toner probe

Explanation:

The tone probe allows you to apply a tone signal to a pair of wires or a single conductor, while the trace is done with an amplified probe. When used in conjunction with the amplified probe, the tone generator allows technicians to identify a wire within any beam, at cross connections or at remote ends. You can use twisted pair, coaxial and disconnected AC wiring.

d.7.5cm is your answer