N10-005 · Question #278
A technician tests a cable going to the patch panel and notices the following output from the cable tester: 1------------------1 2------------------2 3------------------3 4------------------4…
The correct answer is D. White Green. In the T568A wiring standard, Pin 1 carries the White/Green wire and Pin 3 carries the White/Orange wire. The cable tester output reveals a crossed connection between pins 1 and 3 - the White/Green wire (which belongs at Pin 1) has been placed at Pin 3, and vice versa. This…
Question
A technician tests a cable going to the patch panel and notices the following output from the cable tester:
1------------------1 2------------------2 3------------------3 4------------------4 5------------------5 6------------------6 7------------------7 8------------------8 On a T568A standard CAT5e cable, which of the following wire strands is the cause of this connectivity issue?
Options
- AWhite Orange
- BSolid Brown
- CSolid Orange
- DWhite Green
How the community answered
(25 responses)- A4% (1)
- B4% (1)
- C16% (4)
- D76% (19)
Explanation
In the T568A wiring standard, Pin 1 carries the White/Green wire and Pin 3 carries the White/Orange wire. The cable tester output reveals a crossed connection between pins 1 and 3 - the White/Green wire (which belongs at Pin 1) has been placed at Pin 3, and vice versa. This swap causes a connectivity failure because the transmit and receive pairs are mismatched. The White/Green wire (Answer D) is the specific strand responsible, as it is out of position relative to the T568A specification. Pins 1, 2, 3, and 6 carry data in Fast Ethernet, so any fault in the green pair (Pins 1/2) directly breaks connectivity.
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