CCNA系列认证CCNA(640-802)章节练习(2019.10.28)

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1 Which command is used to copy the configuration from RAM into NVRAM？（）

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2 What TCP/IP stack configuration features can DHCP provide, in addition to assigning an IP address? (Choose three.)（）

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3 A system administrator installed a new switch using a script to configure it. IP connectivity was tested using pings to SwitchB. Later attempts to access NewSwitch using Telnet from SwitchA failed. Which statement is true?（）

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4 Which commands is necessary to permit SSH or Telnet access to a cisco switch that is otherwise configured for these vty line protocols?（）

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5 Which command can be used from a PC to verfy the connectivity between host that connect through path?（）

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6 At which layers of the OSI model do WANs operate? (Choose two.)（）

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7 Which two states are the port states when RSTP has converged?（）

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8 Why would a network administrator configure port security on a switch?（）

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9 What is the effect of the following access list condition?  access-list 101 permit ip 10.25.30.0 0.0.0.255 any（）。

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10 For the network 192.0.2.0/23, which option is a valid IP address that can be assigned to a host?（）

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