Held, Gilbert. <br/><br/>
Cisco Security Architectures / 
Gilbert Held 
 - New York :  McGraw-Hill,  1999 
 - 331 p. :  ill 
<br/><br/><label>ISBN: </label>0071347089 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks--Security measures.<br/>Computer network architectures.
<br/><br/><label>LC Class. No.: </label>TK5105.59  / H45 C3 1999