题目内容

关于Windows操作系统中DHCP服务器的租约，下列说法中错误的是（）

A. 默认租约期是8天
B. 客户端一直使用DHCP服务器分配给它的IP地址，直至整个租约期结束才开始联系更新租约
C. 当租约期过了一半时，客户端将与提供IP地址的DHCP服务器联系更新租约
D. 在当前租约期过去87.5%时，如果客户端与提供IP地址的DHCP服务器联系不成功，则重新开始IP租用过程

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TCP是互联网中的 (12) 协议，使用 (13) 次握手协议建立连接。（13）应选入（）。

A. 1
B. 2
C. 3
D. 4

传输一幅分辨率为640x480，6.5万色的照片（图像），假设采用数据传输速度为56Kbps，大约需要（）秒钟。

A. 34.82
B. 42.86
C. 85.71
D. 87.77

Extreme Programming (XP) is a discipline of software development with (14) of simplicity, communication, feedback and courage. Successful software development is a teameffort - not just the development team, but the larger team consisting of customer,management and developers. XP is a simple process that brings these people together andhelps them to succeed together. XP is aimed primarily at object-oriented projects using teamsof a dozen or fewer programmers in one location. The principles of XP apply to any (15) project that needs to deliver quality software rapidly and flexibly.An XP project needs a(an) (16) customer to provide guidance. Customers, programmers, managers, are all working (17) to build the system that’sneedeD． Customers - those who have software that needs to be developed - will learn simple,effective ways to (18) what they need, to be sure that they are getting what they need,and to steer the project to success. （17）应选入（）。

A. together
B. by themselves
C. separately
D. alone

关于系统总线，下面的论述中，不正确的是（）

A. 系统总线在计算机各个部件之间传送信息
B. 系统总线就是连接一个源部件和多个目标部件的传输线
C. 系统总线必须有选择功能，以判别哪个部件可以发送信息
D. 系统总线的标准分为正式标准和工业标准