TY  - BOOK
AU  - Harrington, Jan, L 
TI  - Network security: a practical approach 
SN  - 81-312-0216-X 
U1  - 004.65 HAR  
PY  - 2006///
CY  - Morgan kaufmann publishers 
PB  - New Delhi 
KW  - COMPUTER NETWORK
ER  -