题目内容

The connection between two networks to form an internet is handled by a machine known as a ______.

A. bridge
B. client
C. router
D. switch

查看答案

搜索结果不匹配？点我反馈

更多问题

One tool that is useful during both analysis and design is the ______, which is a pictorial representation of the items of information(entities) within the system and the relationships between these pieces of information.

A. data dictionary
B. dataflow diagram
C. use case diagram
D. entity-relationship diagram

WebSQL is a SQL-like (26) language for extracting information from the weB. Its capabilities for performing navigation of web (27) make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the links in a (28) , all the pages that can be reached from a given URL through (29) that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (30) Interface. （28）是（）

A. hypertext
B. page
C. protocol
D. operation

Consumption of the total life-cycle effort in software maintenance is ______ that in software development.

A. less than
B. larger than
C. equal Or less than
D. equal or larger than

A ______ infected computer may lose its data.

A. file
B. database
C. virus
D. program