單項選擇題You have set up an Internet based FTP server, where people can upload and download files. In terms of the OSI model, what is the highest layer used during the FTP sessions.()

A.Application
B.Presentation
C.Session
D.Transport
E.Internet
F.DataLink
G.Physical


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2.多項選擇題Which three of the protocols below belong to the application layer?()

A.ARP
B.HTTPS
C.SMTP
D.CDP
E.TFTP
F.ICMP

3.多項選擇題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

4.單項選擇題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

5.多項選擇題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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