TY  - BOOK
AU  - Stallings, William 
TI  - Network security essentials: applications and standards 
SN  - 978-81-317-1664-9 
U1  - 004.62 STA  
PY  - 2009///
CY  - Pearson education asia 
PB  - New Delhi 
KW  - COMPUTER NETWORK
ER  -