單項選擇題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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2.單項選擇題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

3.單項選擇題某公司申請到一個C類IP地址，需要分配給8個子公司，最好的子網(wǎng)掩碼設應為（）。

A.255.255.255.0
B.255.255.255.128
C.255.255.255.240
D.255.255.255.224

4.多項選擇題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

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

A.主機A在網(wǎng)絡中廣播ARP請求報文
B.主機B接收到請求報文后將自己的IP地址到MAC地址的映射發(fā)送給主機A
C.主機B收到請求報文后將主機A的IP地址和MAC地址映射存儲到自己的CACHE中
D.主機A緩存主機B的IP地址到MAC地址的映射