CCNA系列认证CCNA(640-802)章节练习(2020.05.27)

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1 What are two security appliances that can be installed in a network? (Choose two.)（）

2 The OSPF hello protocol performs which of the following tasks?（）

3 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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4 What can be determined from the line of show ip route output shown in the exhibit?（）

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5 Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）

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6 Which of the following are key characteristics of PPP?（）

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7 The network security policy requires that only one host be permitted to attach dynamically to each switch interface. If that policy is violated, the interface should shut down. Which two commands must the network administrator configure on the 2950 Catalyst switch to meet this policy?（）

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8 Workstation A has been assigned an IP address of 192.0.2.24/28. Workstation B has been assigned an IP address of 192.0.2.100/28. The two workstations are connected with a straight-through cable. Attempts to ping between the hosts are unsuccessful. What two things can be done to allow communications between the hosts? （）

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9 DNS servers provide what service?（）

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10 A network administrator needs to configure a serial link between the main office and a remote location.The router at the remote office is a non-cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?（）

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