What functions do routers perform in a...

多项选择题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.单项选择题 如下图，两个路由器（Atlanta和Brevard）用串口连接起来。但是他们之间没有数据传输，已知Atlanta配置正确，下图给出部分配置，路由器Brevard上导致该问题的原因是（）。

A.没有设置loopback命令
B.IP地址不正确
C.子网掩码不正确
D.串行链路封装不正确
E.最大传输单元（MTU）设置得太大
F.带宽设置和直连的接口不匹配

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2.单项选择题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.单项选择题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.多项选择题 根据下图，网络连接到路由器R2被汇总为一条192.168.176.0/21的路由，并发给R1。哪两个数据包目的地址R1会转发给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.单项选择题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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6.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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7.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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8.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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9.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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10.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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