TY  - BOOK
AU  - NIIT, .  .
TI  - Basics of network security, firewalls and VPNs / 
SN  - 81-203-2410-2
U1  - BV 
PY  - 2003///
CY  - New Delhi : 
PB  - Prentice-Hall of India Private Limited , 
KW  - Network Security- Firewalls- VPNs
ER  -