What is cable labeling & port mapping?

• A. Consistent labels and documentation for rapid isolation, changes, and audits.
• B. A method for color-coding cables to indicate length.
• C. A scheme for routing cables to minimize interference.
• D. A procedure to test cable continuity.

Answer: (A)

Cable labeling and port mapping is about creating and maintaining consistent identifiers for every cable and keeping an up-to-date map of where each cable ends and which ports they use. The goal is to make it fast and reliable to locate a connection, isolate problems, implement moves or changes, and pass audits or inventories. In practice you assign a unique ID to each cable, label both ends with the source and destination devices, port numbers, and location (rack, row, etc.), and store that relationship in a port-map or asset database. When something goes wrong, you can trace the exact path of the cable, verify you’re touching the correct link, and document changes accurately. This approach is what enables quick fault isolation, safe reconfigurations, and clear records for audits and asset management. Color-coding by length, routing considerations for interference, or merely testing continuity address different tasks and don’t provide the same comprehensive labeling and mapping benefits.