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Difficulty: EasyTroubleshooting Physical Cabling and Connectors

A network technician is inspecting a newly terminated Cat 6 Ethernet patch cable that is failing to transmit data. To confirm that each of the eight individual conductors is connected to its corresponding pin on both ends without any open circuits or shorts, which diagnostic tool should the technician use?

  1. Wire mapperAnswer
  2. B
    Time-Domain Reflectometer (TDR)
  3. C
    Optical Power Meter (OPM)
  4. D
    Loopback plug

Answer

The technician should use a wire mapper to test wire continuity and pin assignments on both ends of the cable.
A wire mapper is the primary tool used to verify that all eight conductors in a twisted-pair copper cable are terminated correctly according to T568A or T568B pinout standards, verifying continuity and identifying miswires, opens, or shorts.

Step-by-Step Solution

1
Identify the goal of the physical layer test.
The requirement is to verify pin-to-pin wiring continuity and conductor alignment on an RJ-45 twisted-pair copper patch cable.
Improper pin terminations, disconnected conductors, or crossed wires prevent link establishment.
2
Select the tool dedicated to verifying conductor pinouts.
A wire mapper is designed specifically to detect open conductors, short circuits, and pin mapping mismatches across copper Ethernet pairs.
It is the direct and standard tool for verifying proper RJ-45 conductor pin assignments.

Key Concept

Pinout and Continuity Testing with a Wire Mapper
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Topics

Troubleshooting Physical Cabling and Connectors

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