Which three statements correctly describe switching? (Choose three.)
A. A Layer 2 switch operates up to the data link layer of the OSI network model.
B. A Layer 3 switch operates up to the transport layer of the OSI network model.
C. A dual-layer switch operates at the application layer of the OSI network model.
D. A multilayer switch operates at all layers of the OSI network model.
E. A Layer 2 switch operates up to the physical layer of the OSI network model.
