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單項選擇題What is one reason that WPA encryption is preferred over WEP?（）

A.A WPA key is longer and requires more special characters than the WEP key.
B.The access point and the client are manually configured with different WPA key values.
C.WPA key values remain the same until the client configuration is changed.
D.The values of WPA keys can change dynamically while the system is used.

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1.單項選擇題在使用VLSM技術的網(wǎng)絡中使用一個C類的IP地址，以下哪個子網(wǎng)掩碼在點對點串行鏈路中是最不浪費地址空間的？（）

A.255.255.255.0
B.255.255.255.240
C.255.255.255.248
D.255.255.255.252
E.255.255.255.254

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2.單項選擇題Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled?（）

A.Set the SSID value in the client software to public.
B.Configure open authentication on the AP and the client.
C.Set the SSID value on the client to the SSID configured on the AP.
D.Configured MAC address filtering to permit the client to connect to the AP.

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3.單項選擇題 根據(jù)下圖，Switch-1需要往一臺MAC地址為00b0.d056.efa4的主機發(fā)數(shù)據(jù)，Switch-1會如何處理這些數(shù)據(jù)？（）

A.Switch-1會丟棄該數(shù)據(jù)，因為它沒有該MAC地址條目
B.Switch-1會防洪該數(shù)據(jù)到所有的接口，除了該數(shù)據(jù)的源接口
C.Switch-1會發(fā)送ARP請求到所有的接口，除了該數(shù)據(jù)的源接口
D.Switch-1會往默認網(wǎng)關發(fā)送該數(shù)據(jù)

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4.單項選擇題 根據(jù)下圖，哪個交換機為打印機提供了生成樹中的指定端口角色？（）

A.Switch1
B.Switch2
C.Switch3
D.Switch4

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5.多項選擇題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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