试题1

下列叙述中，与提高软件可移植性相关的是 （ ） 。
A、选择时间效率高的算法
B、尽可能减少注释
C、选择空间效率高的算法
D、尽量用高级语言编写系统中对效率要求不高的部分

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试题2

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试题3

SNMPv2引入信息块的概念，用于说明一组定义，以下不属于这种模块的是 （ ） 。
A、MIB模块
B、MIB的依从性声明模块
C、管理能力说明模块
D、代理能力说明模块

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试题4

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试题5

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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试题6

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试题7

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试题8

客户端采用 ping 命令检测网络连接故障时，可以 ping 通 127.0.0.1 及本机的 IP 址，但无法 ping 通同一网段内其他工作正常的计算机的 IP 地址。该客户端的故障可能是（ ）。
A．TCP/IP 协议不能正常工作
B．本机网卡不能正常工作
C．网络线路故障
D．本机 DNS 服务器地址设置错误

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试题9

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试题10

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