2. 计算机
  3. In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet. Spread spectr

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet. Spread spectr

admin2009-02-15  21
问题 In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
   Spread spectrum simply means that data is sent in small pieces over a number of the(71)frequencies available for use at any time in the specified range. Devices using(72)spread spectrum(DSSS)communicate by(73)each byte of data into several parts and sending them concurrently on different(74). DSSS uses a lot of the available(75), about 22 megahertz(MHz).
选项 A、direct-sequence
B、discrete-sequence
C、duplicate-sequence
D、dedicate-sequence
答案A
解析
转载请注明原文地址:https://kaotiyun.com/show/GiPZ777K
本试题收录于： 网络工程师上午基础知识考试题库软考中级分类
0

网络工程师上午基础知识考试

软考中级

相关试题推荐
随机试题
最新回复(0)