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What is the maximum speed of Thunderbolt 2?

  1. 5 Gbps

  2. 10 Gbps

  3. 20 Gbps

  4. 40 Gbps

The correct answer is: 20 Gbps

Thunderbolt 2 has a maximum speed of 20 Gbps. This is twice as fast as Thunderbolt 1, which has a maximum speed of 10 Gbps. Option A (5 Gbps) is incorrect as it is the maximum speed of USB 3.1 Gen 1. Option B (10 Gbps) and D (40 Gbps) are incorrect as they are the maximum speeds of Thunderbolt 1 and Thunderbolt 3, respectively. Only option C (20 Gbps) matches the maximum speed of Thunderbolt 2.