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CCNA系列認(rèn)證CCNA(640-802)單項(xiàng)選擇題每日一練(2019.11.11)
來(lái)源：考試資料網(wǎng)
1
Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）
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2
Acknowledgements, sequencing, and flow control are characteristics of which OSI layer?（）
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3
Which IP address can be assigned to an Internet interface?（）
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4
Which command encrypts all plaintext passwords?（）
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5
Which command is used to see the path taken by packets across an IP network?（）
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