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Zorluk: OrtaNetwork Cable Types and Connectors

A field technician is fabricating custom unshielded twisted-pair (UTP) Category 6 network patch cables to connect desktop computers directly to RJ45 wall outlets. The technician terminates the first connector of a patch cable using the ANSI/TIA T568A wiring standard. Which pinout standard must be used on the opposite connector of the cable to ensure standard straight-through Ethernet connectivity?

  1. T568A on the opposite end to maintain identical pin assignments for a straight-through patch cable.Cevap
  2. B
    T568B on the opposite end to complete a standard straight-through workstation link.
  3. C
    A rollover pinout scheme to allow physical layer signal auto-negotiation.
  4. D
    A crossover pinout scheme to enable Layer 3 subnet routing across the patch link.

Cevap

Terminating the opposite end with the T568A wiring standard maintains identical pin assignments on both ends, creating the standard straight-through Ethernet cable required for workstation connectivity.
To create a straight-through patch cable, both connectors must be terminated using the exact same pinout wiring standard. Because the technician used T568A on the first RJ45 connector, terminating the opposite RJ45 connector with T568A produces a straight-through cable suitable for connecting a PC to a wall outlet.

Adım Adım Çözüm

1
Identify the required cable type for workstation-to-wall jack connectivity.
Connecting an end-user host to a wall jack or switch port requires a standard straight-through Ethernet cable.
Straight-through cabling maps transmit pins on one end to receive pins on the receiving network interface device.
2
Determine the pinout mapping rules for straight-through cabling.
Both ends of the cable must follow the exact same wiring standard (either both T568A or both T568B).
Using the same standard on both connectors maintains pin-to-pin mapping (pin 1 to pin 1, pin 2 to pin 2, etc.).
3
Evaluate the first end termination.
Since the first end is terminated using T568A, the second end must also be terminated using T568A.
Mixing T568A on one end and T568B on the other transposes the transmit and receive pairs (pins 1, 2, 3, and 6), which creates a crossover cable instead of a straight-through cable.

Anahtar Kavram

T568A vs T568B Ethernet Pinout Standards and Cable Types
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Network Cable Types and Connectors

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