"Halsall, Fred" <br/><br/>
Data communications computer networks/ 
Fred Halsall 
 - 4th 
 - New Delhi:  "Pearson,"  2005 
 - 915p. 
<br/><br/><label>ISBN: </label>817808-098-2 
<br/><br/><label>Subjects--Index Terms: </label>Open Systemstem 
<br/><br/><label>Dewey Class. No.: </label>4.6