Comer, Douglas E. <br/><br/>
The Internet Book 
Douglas E. Comer 
 - 4th.ed. 
 - Upper Saddle River, New Jersey  Pearson/Prentice Hall  2007 
 - xxvii,380p.  ill.  23cm. 
<br/><br/> includes index : p.373 - 380 
<br/><br/><label>ISBN: </label>0132335530 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks<br/>Internet<br/>World Wide Web