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Zorluk: OrtaPhysical Interface and Cabling Types

A network technician needs to connect a router FastEthernet interface directly to a server FastEthernet interface without using an intermediate switch. Both device interfaces have Auto-MDIX disabled. The technician terminates the first end of an Ethernet cable using the T568B standard (Pin 1: White/Orange, Pin 2: Orange, Pin 3: White/Green, Pin 6: Green). Which color wiring pinout must be used on the opposite RJ-45 connector to ensure a functional connection?

  1. Pin 1: White/Green, Pin 2: Green, Pin 3: White/Orange, Pin 6: Orange (T568A standard)Cevap
  2. B
    Pin 1: White/Orange, Pin 2: Orange, Pin 3: White/Green, Pin 6: Green (T568B standard)
  3. C
    Pin 1: Brown, Pin 2: White/Brown, Pin 3: Green, Pin 6: White/Green (Rollover layout)
  4. D
    Pin 1: Blue, Pin 2: White/Blue, Pin 3: White/Orange, Pin 6: Orange (Non-standard layout)

Cevap

Terminating the opposite end using the T568A standard (Pin 1: White/Green, Pin 2: Green, Pin 3: White/Orange, Pin 6: Orange) creates a functional crossover cable by crossing transmit pins 1 and 2 with receive pins 3 and 6.
Because both the router and server act as DTE devices, transmitting on pins 1 and 2 and receiving on pins 3 and 6, connecting them directly without Auto-MDIX requires a crossover cable. Terminating one end with T568B and the other with T568A ensures that the transmit pins on one end connect directly to the receive pins on the other.

Adım Adım Çözüm

1
Identify the roles of the interconnected devices and Auto-MDIX status
Both the router interface and server interface act as DTE devices that transmit on pins 1 and 2 and receive on pins 3 and 6.
Direct connection between like DTE devices requires a crossover cable when Auto-MDIX is unavailable to automatically swap pin assignments.
2
Determine the standard pinout requirement for an Ethernet crossover cable
One end must be terminated with T568B and the opposing end terminated with T568A.
This configuration swaps pair 2 (orange, pins 1 and 2) with pair 3 (green, pins 3 and 6).
3
Select the correct T568A wire sequence for the second connector
Pin 1: White/Green, Pin 2: Green, Pin 3: White/Orange, Pin 6: Orange.
Matching T568A on the second end aligns the first end's transmit pins with the second end's receive pins.

Anahtar Kavram

Ethernet Crossover Cable Pinout (T568A to T568B)
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Physical Interface and Cabling Types

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