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Which of the following network connectivity devices runs at the OSI model's Layer 2?

A Switch.

Layer 2 of the open systems interconnection (OSI) concept is where switches operate. The OSI model is divided into seven layers: (1) physical, (2) datalink, (3) network, (4) transport, (5) session, (6) presentation, and (7) application. Transmission media such as unshielded twisted pair (UTP), shielded twisted pair (STP), fiber optic, and so on are included in the physical layer. Because the datalink layer is responsible for transmitting frames on a LAN, it contains the network interface card (NIC) and switch. Routers are OSI layer 3 devices that transfer data between networks. Hubs operate at OSI layer 1 because they simply connect devices in the same collision domain without taking into account packet header information.

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