TY  - BOOK
AU  - Singh,Brijendra
TI  - Data communications and computer networks / 
SN  - 9788120344662
U1  - 004.6 
PY  - 2011///
CY  - New Delhi : 
PB  - PHI Learning , 
KW  - DATA TRANSMISSION SYSTEMS
KW  - COMPUTER NETWORKS
N1  - Includes bibliography and index
ER  -