The Network Interface cards
A Switch is a Layer 2 device as they operate in the data link layer
Hubs are a physical layer (layer 1) device; most switches operate at the Data Link layer (Layer 2) of the OSI model.
Bridge operate on data link layer
Data Link Layer
Layer 2 - Data Link
No. A digital subscriber line (DSL) operates at layer 2 or the Data-link layer.
data link
Data-link layer
Switches / Bridges and hubs work at data link layer, but there are layer three switches which operate at network layer. Dhruv
Router works in Network Layer of OSI model
at both physical layer 1 and Data Link layer 2
Node