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多項(xiàng)選擇題

Which three of the following OSI model layers also belong to the TCP/IP model?（）

A. The application layer
B. The session layer
C. The data link layer
D. The transport layer
E. The network interface layer
F. The physical layer

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單項(xiàng)選擇題

Which one of the following is the most commonly used layer 2 network device?（）

A. Hub
B. Bridge
C. Switch
D. Router
E. Repeaters
F. None of the above

多項(xiàng)選擇題

In the OSI model, at which layers do WANs operate at?（）

A.Applicationlayer
B.Presentationlayer
C.Sessionlayer
D.Transportlayer
E.Networklayer
F.Datalinklayer
G.Physicallayer

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