TY  - BOOK
AU  - Hallberg, Bruce 
TI  - Networking: A biginers guide 
SN  - 0-07-047263-7 
U1  - 004.6 HAL  
PY  - 2001///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - COMPUTER NETWORK
ER  -