CCNA系列認證章節(jié)練習(2020.02.17)

來源：考試資料網

1 A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5.What command should be issued to accomplish this task？（）

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2 What is the function of the command switchport trunk native vlan 999 on a？（）

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3 Which one of the following privileged EXEC mode IOS show commands will display the state of the OSPF DR/BDR (designated router / backup designated router) election process?（）

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4 Which router IOS commands can be used to troubleshoot LAN connectivity problems? （）

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5 給您分配一個B類IP網絡172.16.0.0，子網掩碼255.255.255.192，則您可以利用的網絡數為（），每個網段最大主機數（）。

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6 中繼端口有哪些模式？（）

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7 Which implement phase service component describes the activities to install and test your Cisco Unified Communications solution in a nonproduction lab environment（）

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8 BGP使用什么來確定到達目的地的最佳路徑？（）

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

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10 Which two ports are used with RADIUS authentication and authorization？（）

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