Introduction to data communication and networks / 
3G E-Learning. 
 - New York, N.Y.:  3G E-Learning,  c2023. 
 - xiv, 299 p. :  col. ill. ;  26 cm. 
<br/><br/>Includes bibliographies & index. 
<br/><br/><label>ISBN: </label>9781984678898 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems<br/>Computer networks