Halsall, Fred. <br/><br/>
Data Communications, Computer Networks, and Open Systems 

 - 4 
 - NewDelhi  Pearson  2002 
 - xv+907p.,25X20Cms. 
<br/><br/><label>ISBN: </label>81-7808-098-2 
<br/><br/><label>Dewey Class. No.: </label>621.38415 H1961