CCNA系列認證CCNA(640-802)單項選擇題每日一練(2019.07.31)

來源：考試資料網(wǎng)

1 Which switch would STP choose to become the root bridge in the selection process?（）

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2 Which device might be installed at a branch office to enable and manage an IPsec site-to-site VPN?（）

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3 What is the maximum data rate specified for IEEE 802.11b WLANs?（）

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4 At which layer of the OSI model is RSTP used to prevent loops?（）

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5 If all OSPF routers in a single area are configured with the same priority value,what value dose a router use for the ODPF router ID in the absence of a loopback interface?（）

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