CCNA系列認證CCNA(640-802)單項選擇題每日一練(2019.10.23)

來源：考試資料網(wǎng)

1 DNS servers provide what service?（）

2 A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?（）

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3 As a CCNA candidate, you must have a firm understanding of the IPv6 address structure. Refer to IPv6 address, could you tell me how many bits are included in each filed?（）

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4 When you are logged into aswitch，which prompt indicates that you are inprivileged mode？（）

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5 Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication? （）

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