Halsall, Fred <br/><br/>
Data communication,computer networks and open systems 

 - 4th ed. 
 -  Pearson Education  1999 
 - 907p. 
<br/><br/><label>ISBN: </label> 375 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COMPUTER
<br/><br/><label>Dewey Class. No.: </label>004.6  / HAL