Which protocol is an open standard pro...

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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1.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

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2.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

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3.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

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4.多项选择题What three pieces of information can be used in an extended access list to filter traffic (Choose three.)（）。

A.protocol
B.VLAN number
C.TCP or UDP port numbers
D.source switch port number
E.source IP address and destination IP address
F.source MAC address and destination MAC address

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5.单项选择题Acknowldgement, Sequencing, and Flow control are characteristics of which OSI layer?（）

A.Layer 2
B.Layer 3
C.Layer 4
D.Layer 5
E.Layer 6
F.Layer 7

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6.单项选择题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?（）

A.Authentication needs to be changed to PAP for both routers.
B.Serial IP addresses of routers are not on the same subnet.
C.Username/password is incorrectly configured.
D.Router names are incorrectly configured.

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7.多项选择题 Exhibit: Which of the following are true regarding the command output shown in the display (Choose two.)（）。

A.There are at least two routers participating in the RIP process.
B.A ping to 192.168.168.2 will be successful.
C.A ping to 10.0.15.2 will be successful.
D.RtrA has three interfaces participating in the RIP process.

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8.单项选择题A switch is configured as a vtp sever with a domain name of CCNA.Which cisco ios privileged mode command,followed by are load of the swith,will reset the VTP management domain name of the switch to a NULL value?（）

A.#vtp domain unset
B.#delete vlan.dat
C.#novtp domain
D.#vtp domain null

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9.单项选择题哪个路由协议默认用带宽和延迟作为metrics值？（）

A.RIP
B.BGP
C.OSPF
D.EIGRP

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10.多项选择题Which can be done to secure the virtual terminal interfaces on a router？（）

A.Administratively shut down the interfaces.
B.Physically secure the interfaces.
C.Configure a virtual terminal password and login process.
D.Enter an access list and apply it to the terminal interfaces using the access-class command.
E.Create an access list and apply it to the terminal interfaces using the access-groupc ommand.

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