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單項(xiàng)選擇題A wireless client cannot connect to an 802.11b/g BSS with a b/g wireless carD.The client section of the access point does not list any active WLAN clients. What is a possible reason for this?（）

A.The incorrect channel is configured on the client.
B.The client's IP address is on the wrong subnet.
C.The client has an incorrect pre-shared key.
D.The SSID is configured incorrectly on the client.

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A.FTP
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2.單項(xiàng)選擇題Which parameter can be tuned to affect the selection of a static route as a backup. when a dynamic protocol is also being used？（）

A.link bandwidth
B.hop count
C.link cost
D.administrative distance
E.link delay

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3.單項(xiàng)選擇題某公司申請(qǐng)到一個(gè)C類IP地址，需要分配給8個(gè)子公司，最好的子網(wǎng)掩碼設(shè)應(yīng)為（）。

A.255.255.255.0
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C.255.255.255.240
D.255.255.255.224

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4.多項(xiàng)選擇題Which of the following IP addresses fall into the CIDR block of 115.（）

A.115.64.8.32
B.115.64.7.64
C.115.64.6.255
D.115.64.3.255
E.115.64.5.128
F.115.64.12.128

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5.多項(xiàng)選擇題若主機(jī)A需要知道主機(jī)B的MAC地址，則屬于ARP的工作流程為（）。

A.主機(jī)A在網(wǎng)絡(luò)中廣播ARP請(qǐng)求報(bào)文
B.主機(jī)B接收到請(qǐng)求報(bào)文后將自己的IP地址到MAC地址的映射發(fā)送給主機(jī)A
C.主機(jī)B收到請(qǐng)求報(bào)文后將主機(jī)A的IP地址和MAC地址映射存儲(chǔ)到自己的CACHE中
D.主機(jī)A緩存主機(jī)B的IP地址到MAC地址的映射

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