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多項(xiàng)選擇題What functions do routers perform in a network (Choose two.)（）。

A.packet switching
B.access layer security
C.path selection
D.VLAN membership assignment
E.bridging between LAN segments
F.microsegmentation of broadcast domai

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1.單項(xiàng)選擇題 如下圖，兩個(gè)路由器（Atlanta和Brevard）用串口連接起來(lái)。但是他們之間沒(méi)有數(shù)據(jù)傳輸，已知Atlanta配置正確，下圖給出部分配置，路由器Brevard上導(dǎo)致該問(wèn)題的原因是（）。

A.沒(méi)有設(shè)置loopback命令
B.IP地址不正確
C.子網(wǎng)掩碼不正確
D.串行鏈路封裝不正確
E.最大傳輸單元（MTU）設(shè)置得太大
F.帶寬設(shè)置和直連的接口不匹配

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2.單項(xiàng)選擇題You have finished physically installing an access point on the ceiling at your officE.At a minimum, which paramenter must be configured on the access point in order to allow a wireless client to operate on it?（）

A.AES
B.PSK
C.SSID
D.TKIP
E.WEP

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3.單項(xiàng)選擇題At which OSI layer is a logical path created between two host systems（）。

A.session
B.transport
C.network
D.data link
E.physical

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4.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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5.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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