单项选择题

Which protocol is an open standard protocol frame work that is commonly used in VPNs，to provid secureend-to-end communication？（）

A.L2TP
B.IPsec
C.PPTP
D.RSA

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单项选择题

If an Ethernet port on a router was assigned an IP address of 172.1.1.1/20,what is the maximum number of hosts allowed on this subnet?（）

A.4094
B.1024
C.8190
D.2046
E.4096

单项选择题

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the nework administrator is using for this operation?（）

A.application
B.presentation
C.session
D.transport
E.internet
F.datalink

单项选择题

根据下图中展示的show running-config命令的结果。网络管理员该如何做才能允许工作站连接到FastEthernet0/0接口去获得一个IP地址？（）

A.在接口FastE thernet0/0应用access-group14
B.在access-list14中添加access-list 14 permit any any
C.配置FastE therent0/0接口的IP地址为10.90.201.1
D.为接口FastE thernet0/0添加一个接口描述