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问题 单项选择题

软件测试通常采用黑盒测试和白盒测试。其中黑盒测试根据软件的 (55) 设计测试用例，白盒测试根据软件的 (56) 设计测试用例。

(55)

A．功能规格说明
B．需求说明
C．内部结构和逻辑
D．数据流图

答案

参考答案：A

选择题

读“木桶效应（组成木桶的木板如果长短不齐，那么这只木桶的盛水量，不取决于最长的那一块木板，而是取决于最短的那一块）图”，完成下题。

某一封闭区域以耕地、森林、淡水、矿产测得的各自所能供养的人口数量分别为8000、6000、4500、10000，则该地的人口容量取决于[ ]

A．耕地

B．森林

C．淡水

D．矿产
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单项选择题

Most IP layer-based proxy mechanisms, such as network address translation (NAT), only support uni-directional proxy, from the internal network to external network (the Internet). The proxy establishes the communication channel by (66) IP addresses. The IP addresses must be (67) . These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software (68) for each application that uses (69) channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs, with (70) IP addresses.

A．duplicating

B．overlapping

C．crossing

D．repeating
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