CCNA系列认证CCNA(640-802)章节练习(2019.05.16)

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1 How many subnets can be gained by subnetting 172.17.32.0/23 into a /27 mask, and how many usable host addresses will there be per subnet?（）

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2 How does using the service password encryption command on a router provide additional security? （）

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3 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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4 Which address is the IPV6 all-RIP-routers muticast group address that is used by RIPng as the destaion address?（）

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5 The administrator is unable to establish connectivity between two Cisco routers. Upon reviewing the command output of both routers, what is the most likely caust of the problem?（）

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6 Which two of these statements are true of IPv6 address representation?（）

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7 At which layers of the OSI model do WANs operate?（）

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8 Which option is a valid IPv6 address?（）

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9 Which parameter can be tuned to affect the selection of a static route as a backup.when a dynamic protocol is also being used?（）

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10 Acknowledgements, sequencing, and flow control are characteristics of which OSI layer?（）

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