單項選擇題For security reasons, the network administrator needs to prevent pings into the corporate networks from hosts outside the internetwork. Which protocol should be blocked with access control lists（）。

A.IP
B.ICMP
C.TCP
D.UDP


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2.單項選擇題下列哪一個命令用于指定物理接口做備份接口？（）

A.[Quidway]#standby interface s0
B.[Quidway-Serial1]#standby interface s0

3.多項選擇題Which two features did WPAv1 add to address the inherent weaknesses found in WEP?（）

A.a stronger encryption algorithm
B.key mixing using temporal keys
C.shared key authentication
D.a shorter initialization vector
E.per frame sequence counters

4.單項選擇題ISDN基本速率接口（BRI）速率是（）。

A.16kbps
B.64kbps
C.144kbps
D.2048kbps

5.單項選擇題What should be part of a comprehensive network security plan（）。

A.Allow users to develop their own approach to network security
B.Physically secure network equipment from potential access by unauthorized individuals
C.Encourage users to use personal information in their passwords to minimize the likelihood of passwords being forgotten
D.Delay deployment of software patches and updates until their effect on end-user equipment is well known and widely reported
E.Minimize network overhead by deactivating automatic antivirus client updates

6.多項選擇題QuidwayS2403F以太網(wǎng)交換機的用戶權限級別有（）。

A.normal
B.visit
C.monitor
D.manage
E.operator

7.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.

9.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

10.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