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多項(xiàng)選擇題 根據(jù)下圖，網(wǎng)絡(luò)連接到路由器R2被匯總為一條192.168.176.0/21的路由，并發(fā)給R1。哪兩個(gè)數(shù)據(jù)包目的地址R1會(huì)轉(zhuǎn)發(fā)給R2？（）

A.192.168.194.160
B.192.168.183.41
C.192.168.159.2
D.192.168.183.255
E.192.168.179.4
F.192.168.184.45

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1.單項(xiàng)選擇題What is the effect of using the service password-encryption comma（）。

A.Only the enable password will be encrypted.
B.Only the enable secret password will be encrypted.
C.Only passwords configured after the command has been entered will be encrypted.
D.It will encrypt the secret password and remove the enable secret password fromthe configuration.
E.It will encrypt all current and future passwords.

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2.單項(xiàng)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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3.單項(xiàng)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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4.單項(xiàng)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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5.單項(xiàng)選擇題 根據(jù)下圖中展示的show running-config命令的結(jié)果。網(wǎng)絡(luò)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(gè)IP地址？（）

A.在接口FastE thernet0/0應(yīng)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(gè)接口描述

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