CompTIA Network+ (N10-009) — Question 82

Which of the following devices can operate in multiple layers of the OSI model?

Answer options

• A. Hub
• B. Switch
• C. Transceiver
• D. Modem

Correct answer: B

Explanation

The correct answer is B, Switch, as it operates at both the Data Link layer (Layer 2) and can also have functionalities at the Network layer (Layer 3) in advanced models. A Hub operates only at the Physical layer (Layer 1), a Transceiver typically handles the Physical layer as well, and a Modem primarily functions at the Physical layer, making them all limited compared to a Switch.