Cisco CCNA考试七十九题(1)

1.What is the correct order for     the OSI model?   　　P=Presentation, S=Session, D=Datalink, 　　Ph=Physical, T=Transport, A= Application, 　　N=Network   　　A. P S A PH D N T   　　B. A P S T N D PH   　　C.

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