单项选择题
Data encryption and decryption occurs at which layer of the OSI model?（）
A.Transport
B.Presentation
C.Session
D.Application
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相关考题
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单项选择题
Which of the following is the MOST accurate description of a L2/L3 switch?（）
A. Performs switching and routing duties
B. A router that directly connects to a switch
C. A multi-purpose switch fabric used in full mesh environments
D. A switch that directly connects to a router -
单项选择题
A technician would use a physical network diagram to determine:（）
A. the cause of routing errors.
B. the number of switches on the network.
C. the number of users on the network.
D. where network latency will occur. -
单项选择题
Which of the following uses PKI?（）
A.Blowfish
B.AES
C.PGP
D.3DES
