CCNA系列認(rèn)證CCNA(640-802)單項(xiàng)選擇題每日一練(2019.08.05)

來(lái)源：考試資料網(wǎng)

1 Router A is unable to reach Router B.Both routers are running ios version 12.0.After reviewing the command output and graphic,what is the most likely cause of the problem?（）

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2 A network engineer wants to allow a temporary entry for a remote user with a specific usename and password so that the user can access the entire network over the internet.which ACL can be used?（）

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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 What is the default routing update period for RIPv2?（）

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5 which command is used to enable CHAP authentication whit PAP as the fallback method on a serial interface?（）

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