If a network patch cord fails, can it be detected and identified quickly?

Yes, network patch cord faults can be quickly detected and identified. The following are several commonly used methods:
Visual inspection: First, a visual inspection can be conducted to check for obvious physical damage to the jumper, such as breakage, wear, excessive bending, etc.
Swapping Jumpers: One of the simplest methods is to replace a suspected faulty jumper with a known normal one and see if the problem is resolved. This method can quickly determine if there is a problem with the jumper.
Network tester: Using a network tester (such as a cable tester or cable certification tester) can more accurately detect any issues with the jumper. These devices can test the connectivity, attenuation, crosstalk, and other parameters of cables to help identify specific fault locations and types.
Port testing: Connect the jumper to different network ports to eliminate the possibility of port failure. If the problem persists after replacing the port, the fault may lie with the jumper itself.
Diagnostic tools: Some advanced network devices (such as smart switches) come with diagnostic tools that can run diagnostic tests through the management interface to detect connection status and cable quality.
Using computers or other terminal devices: Devices connected to jumpers can be tested through network diagnostic tools on the operating system, such as Windows' Network Diagnostic tool or Linux's command-line tool (such as ping, traceroute, etc.) to check network connectivity.
By using the above methods, network patch cord issues can be quickly detected and identified, allowing for timely repair or replacement, ensuring the stability and reliability of network connections.