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單項選擇題

Which of the following is the BEST network device to allow multiple network connections to beterminated in one spot?（）

A. A patch panel
B. A 66 block
C. A smart jack
D. A cross connect

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單項選擇題

Which of the following uses TCP?（）

A.DHCP
B.SNMP
C.TFTP
D.IMAP4

單項選擇題

Data encryption and decryption occurs at which layer of the OSI model?（）

A.Transport
B.Presentation
C.Session
D.Application

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