Freed, Les. <br/><br/>
How Networks Work  
Derfler J. Frank Jr., Les Freed. 
 - 4th ed. 
 - New Delhi :  Techmedia,  c1999. 
 - ix, 212 p.:  ill.; 
<br/><br/><label>ISBN: </label>8176352586 
<br/><br/><label>Dewey Class. No.: </label>004.65  / DER/FRE/HOW