Brown, Steven. <br/><br/>
Implementing virtual private networks / 
Steven Brown. 
 - New York :  McGraw-Hill,  1999. 
 - xxi, 594 p. :  ill. ;  23 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>007135185X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Extranets (Computer networks).