Which three of the following statements correctly describe switching?

Which three of the following 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 transport and data link layers of the OSI network model.?

D.
A dual-layer switch operates at the data link and network layers of the OSI network model.?

E.
A multilayer switch operates up to Layer 4 of the OSI network model.?