Which layer of the OSI model does a Layer 2 switch operate on?

A Layer 2 switch operates at the Data Link layer of the OSI model. This layer is responsible for node-to-node data transfer and handles error correction from the Physical layer. It uses MAC (Media Access Control) addresses to identify devices on a local area network (LAN) and make decisions about frame forwarding.

Layer 2 switches analyze incoming data packets and switch them based on their MAC addresses, allowing for efficient traffic management within the same local network. This capability is crucial because it minimizes unnecessary traffic and enhances network performance.

The other layers mentioned relate to different functions within the OSI model: the Application layer focuses on end-user software interactions, the Transport layer is responsible for end-to-end communication and data integrity, and the Network layer manages routing and forwarding of packets across multiple networks. Understanding that the Layer 2 switch specifically utilizes the Data Link layer's capabilities clarifies its role in network design and operations.