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單項選擇題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.單項選擇題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.單項選擇題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.單項選擇題 根據(jù)下圖中展示的show running-config命令的結果。網(wǎng)絡管理員該如何做才能允許工作站連接到FastEthernet0/0接口去獲得一個IP地址？（）

A.在接口FastE thernet0/0應用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地址為10.90.201.1
D.為接口FastE thernet0/0添加一個接口描述

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4.多項選擇題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.單項選擇題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.單項選擇題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.多項選擇題 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.單項選擇題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.單項選擇題哪個路由協(xié)議默認用帶寬和延遲作為metrics值？（）

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

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10.多項選擇題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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