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軟題庫(kù) 學(xué)習(xí)課程
試卷年份2010年下半年
試題題型【單選題】
試題內(nèi)容

OSI is a theoretical model that shows how any two different systems can communicate with each other．Router, as a networking device, operate at the (    ) layer of the OSI model．
A．transport
B．a(chǎn)pplication
C．network
D．physical

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