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The pins on an RJ-45 cable plug are numbered from 1 through 8. When the metal pins of the plug are facing toward you, pin 1 is the leftmost pin. Which two sets of pins are looped on an RJ-45 56K loopback plug? (Choose two.)
Correct Answer: B,D
Loopback plugs are used to test the physical connections and configurations of network equipment. In a 56K modem loopback plug, the following pins are looped to create a test signal: Pins 1 and 7 (Transmit): Looping the transmit pins back to each other allows the device to test its own signal transmission. Pins 2 and 8 (Receive): Looping the receive pins back to each other allows the device to test its ability to receive its own signal. Understanding RJ-45 Wiring: RJ-45 connectors are standardized and have a specific pinout for various applications like Ethernet networking and analog telephony connections. You can find resources online that show the standard RJ-45 color coding and pin assignments.
