試題1

嗅探器可以使網絡接口處于雜收模式，在這種模式下，網絡接口 （ ） 。
A、只能夠響應與本地網絡接口硬件地址相匹配的數據幀
B、只能夠響應本網段的廣播數據幀
C、只能響應組播信息
D、能夠響應流經網絡接口的所有數據幀

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試題2

The traditional way of allocating a single channel among multiple competing users is to chop up its (1) by using one of the multiplexing schemes such as FDM (Frequency
Division Multiplexing). If there are N users, the bandwidth is divided into N equal-sized portions, with each user being assigned one portion. Since each user has a private frequency (2), there is no interference among users.When there is only a small and constant number of users, each of which has a steady stream or a heavy load of (3), this division is a simple and efficient allocation mechanism. A wireless example is FM radio stations. Each station gets a portion of the FM band and uses it most of the time to broadcast its signal.However, when the number of senders is large and varying or the traffic is (4), FDM presents some problems. If the spectrum is cut up into N regions while fewer than N users are currently interested in communicating, a large piece of valuable spectrum will be wasted. If more than N users want to communicate, some of them will be denied (5) for lack of bandwidth.??
（1）A.capability   
B.capacity   
C.ability  
D.power
（2）A.band   
B.range  
C.domain   
D.assignment
（3）A.traffic   
B.date   
C.bursty  
D.flow
（4）A.continuous   
B.steady   
C.bursty   
D.flow
（5）A.allowance  
B.connection   
C.percussion  
D.percussion

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試題3

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試題4

（ ） 無法有效防御DDoS攻擊。
A、根據IP地址對數據包進行過濾
B、為系統(tǒng)訪問提供更高級別的身份認證
C、安裝防病毒軟件
D、使用工具軟件檢測不正常的高流量

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試題5

RIP協議中可以使用多種方法防止路由循環(huán)，在以下選項中不屬于這些方法的是  ( )  。
A、垂直翻轉
B、水平分割
C、反向路由中毒
D、設置最大度量值

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試題6

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試題7

Linux系統(tǒng)中，下列關于文件管理命令cp與mv說法正確的是?。?）　。
A、沒有區(qū)別
B、mv操作不增加文件個數
C、cp操作不增加文件個數
D、mv操作不刪除原有文件

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試題8

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試題9

默認情況下，Linux系統(tǒng)中用戶登錄密碼信息存放在  ( )  文件中。
A、/etc/group
B、/etc/userinfo
C、/etc/shadow
D、/etc/profile

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試題10

軟件產品的可靠度并不取決于  ( )
A、潛在錯誤的數量
B、潛在錯誤的位置
C、軟件產品的使用方法
D、軟件產品的開發(fā)方式

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