Data communication networks 
Dr. Sharma Sanjay 
 - S.K. Kataria & Sons New Delhi  2021 
 - ill.; 468p.; 25cm 
<br/><br/> Includes Index 
<br/><br/><label>ISBN: </label>9789350141700 
<br/><br/><label>Dewey Class. No.: </label>C 004.6 Sh531 2021