Cable Testing Tools Explained - Wire Maps, TDR, OTDR, and Loopback - Network+ N10-009

Cable testing is the first line of troubleshooting on the Network+ N10-009 exam, and the tools you choose decide whether a service call takes 10 minutes or a full day. This video walks through wire map testers and the four faults they detect (opens, shorts, miswires, and the sneaky split pair that fools a continuity tester), then shows how a TDR locates copper faults by timing pulse reflections and how an OTDR does the same job for fiber by reading backscatter. Covers loopback plugs for isolating NICs and transceivers, tone generators and inductive probes for tracing one cable in a bundle, optical light sources paired with power meters for end-to-end fiber loss certification, and visual fault locators for finding breaks you can literally see through the jacket. Watch the next video in the playlist for the software side of this domain - ping, traceroute, pathping, and MTR.

▶ Watch next: Ping, Traceroute, Pathping, and MTR Explained - Network+ N10-009 https://www.youtube.com/watch?v=Rui0Z5yMBiU