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  第74题      
  章/节:   专业英语       

 
CSMA,although more efficient than ALOHA or slotted ALOHA,still has one glaring inefficiency.If the medium is busy,the station will wait for a random amount of time. When two frames collide,the medium remains (71) for the duration of transmission of both damaged frames. The use of random delays reduces the probability of (72). For (73) frames,compared to propagation time,the amount of wasted capacity can be considerable.This waste can be reduced if a station continues to listen to the medium while(74).The maximum utilization depends on the length of the frame and on the(75) time; the longer the frames or the shorter the propagation time,the higher the utilization..
 
 
  A.  colliding
 
  B.  forwarding
 
  C.  transmitting
 
  D.  receiving
 
 
 

 
  第71题    2017年上半年  
   75%
CSMA,although more efficient than ALOHA or slotted ALOHA,still has one glaring inefficiency.If the medium is busy,the st..
  第71题    2010年上半年  
   65%
Both bus and tree topologies are characterized by the use of multipoint(71).For the bus, all stations attach, through ap..
  第73题    2012年上半年  
   58%
We have already covered the topic of network addresses. The first (71) in a block (in classes A, B, and C) defines the n..
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第74题    在手机中做本题