TCP软件可以提供（ ）个不同的端口。

【名词&注释】

电子邮件(e-mail)、应用层(application layer)、人才需求(talent demand)、恶意代码(malicious code)、正确性(correctness)、预防性(preventive)、物理层(physical layer)、不通过(fail to pass)、运行时(run-time)

[单选题]TCP软件可以提供（ ）个不同的端口。

A. 28
B. 210
C. 216
D. 232

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学习资料：

[多选题]● Observe that for the programmer, as for the chef, the urgency of the patron （顾客）may govern the scheduled completion of the task, but it cannot govern the actual completion. An omelette（煎鸡蛋）, promised in two minutes, may appear to be progressing nicely. But when it has not set in two minutes, the customer has two choices—waits or eats it raw. Software customers have had （71） choices.Now I do not think software （72） have less inherent courage and firmness than chefs, nor than other engineering managers. But false （73） to match the patron's desired date is much more common in our discipline than elsewhere in engineering. It is very （74） to make a vigorous, plausible, and job risking defense of an estimate that is derived by no quantitative method, supported by little data, and certified chiefly by the hunches of the managers.

A. Clearly two solutions are needed. We need to develop and publicize productivity figures, bug-incidence figures, estimating rules, and so on. The whole profession can only profit from （75） such data. Until estimating is on a sounder basis, individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates.
B. （71）
C. no B． the same
D. other D． lots of
E. （72）
F. testers B． constructors
G. managers D． architects
H. （73）
I. tasks B． jobs
J. works D． scheduling
K. （74）
L. easy B． difficult
M. simple D． painless
N. （75）
O. sharing B． excluding
P. omitting D． ignoring

[单选题]●某财务系统在使用过程中，因个人所得税政策变化，需修改计算工资的程序。这种修改属于（50）维护。

A. 正确性
B. 适应性
C. 完善性
D. 预防性

[单选题]在物联网的架构中，3G、4G属于（）技术。

A. 网络层
B. 感知层
C. 物理层^{(physical layer)}
D. 应用层

[单选题]为了防止电子邮件中的恶意代码，应该用(8)方式阅读电子邮件。

A. 纯文本
B. 网页
C. 程序
D. 会话

[单选题]当在轻型模式下运行时^(run-time)，下列哪个协议管理Cisco 512AP?A、LWAPP

A. B、CDP
B. C、IPDiscovery
C. D、LWAPP子集
G.

[单选题]在进程状态转换过程中，可能会引起进程阻塞的原因是(63)。计算机系统出现死锁是因为(64)。不通过^{(fail to pass)}CPU进行主存与I/O设备间大量的信息交换方式可以是(65)方式。

A. 时间片到
B. 执行V操作
C. I/O完成
D. 执行P操作

[单选题]一般说来，信息化需求包含三个层次，即(19)、(20)和(21)。

A. 企业需求
B. 人才需求
C. 信息需求
D. 战略需求

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