What is a cable matrix used for?

• A. A device for measuring cable resistance.
• B. A map of network subnets.
• C. Document mapping device-to-device ports, cable IDs, and paths for installation and validation.
• D. A schedule for maintenance windows.

Answer: (C)

A cable matrix is a detailed record that maps every physical cable to its endpoints and route through the data center. It lists each cable’s ID, the ports it connects on both ends, the patch panels or switches involved, and the path it takes through racks and corridors. This documentation is used during installation to confirm every cable is connected exactly as designed and during validation to verify that the actual wiring matches the plan. It also helps with future changes, repairs, and troubleshooting by letting technicians quickly trace a connection without guessing. It isn’t about measuring electrical resistance, nor about mapping logical network subnets, nor about scheduling maintenance.