In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the(71) data circuit, which together enable data(72). So-called protocol means, in short, a set of rules that determines the behavior. of functional units in achieving communication.Data circuit, however, consists of a pair of(73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of(74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment(75) to a DCE at the data switching exchange or dam concentrator location.

In a data warehouse environment, data is only valuable when it is organized and displayed as(75)

● （75） is a word processing tool that helps you to create quality documents.（75）

A(75)system placed between the company network and the outside world may limit outside access to the internal network．

The(75)is a collection of computers connected together by phone lines that allows for the global sharing of information.

Why is it important to prevent the abuse of computer data bands?

回答 72 ~ 75 题： E A recent study, while showing a generally positive attitude toward science, also suggests a widespread worry that it may be "running out of control", This idea is dangerous.

● （75） Development is a structured design methodology that proceeds in a sequence from one phase to the next.（75）

● （75） is not a computer languages.（75）

Most(75)measures involve data encryption and password.

● Most （75） measures involve data encryption and password.（75）

一个小组学生的考试成绩分别有75、70、75、75、80、85、90、75、85 ，众数为（）。