2. 从业资格
  3. The traditional way of allocating a sing

The traditional way of allocating a sing

免费题库2022-08-02  4
问题 The traditional way of allocating a single channel among multiple competing users is to chop up its (  ) by using one of the multiplexing schemes such as FDM (Frequency Division Multiplexing). If there are N users, the bandwidth is divided into N equal-sized portions, with each user being assigned one portion. Since each user has a private frequency (  ), there is no interference among users.When there is only a small and constant number of users, each of which has a steady stream or a heavy load of (   ), this division is a simple and efficient allocation mechanism. A wireless example is FM radio stations. Each station gets a portion of the FM band and uses it most of the time to broadcast its signal.However, when the number of senders is large and varying or the traffic is (本题), FDM presents some problems. If the spectrum is cut up into N regions while fewer than N users are currently interested in communicating, a large piece of valuable spectrum will be wasted. If more than N users want to communicate, some of them will be denied (  ) for lack of bandwidth.A.continuousB.steadyC.burstyD.flow
选项 A.continuous
B.steady
C.bursty
D.flow
答案 C
解析
转载请注明原文地址:http://tihaiku.com/congyezige/2405298.html
本试题收录于： 中级 网络工程师题库软件水平考试初中高级分类

中级 网络工程师

软件水平考试初中高级

相关试题推荐
随机试题
最新回复(0)