COMPTIA A+ Practice Exam

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What is the difference in pin count between IEEE 1394a and 1394b?

  1. 2 pins

  2. 3 pins

  3. 1 pin

  4. 9 pins

The correct answer is: 3 pins

IEEE 1394a and 1394b are two different standards for the communication interface commonly known as FireWire. The difference between them is in the maximum data transfer speed and the physical design of the connector. IEEE 1394a has a maximum transfer speed of 400 Mbps and uses a 6-pin connector, while IEEE 1394b has a maximum transfer speed of 800 Mbps and uses a 9-pin connector. Therefore, the difference in pin count between the two is 3, making option B the correct answer. Option A (2 pins) and D (9 pins) do not accurately reflect the differences between the two standards, and option C (1 pin) is not a valid number of pins for either standard.

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