Sheikh, Ahmed F. <br/><br/>
CompTIA security + certification study guide :  network security essentials / 
Ahmed F. Sheikh 
 - New York :  Apress ,  2020 
 - xxi, 266 p. ;  25 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9781484267233 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer networks<br/>Data security
<br/><br/><label>Dewey Class. No.: </label>005.8 SHE