TY  - BOOK
AU  - Northcutt,Stephen
AU  - Edmead,Mark T.
TI  - Inside network perimeter security: the definitive guide to  firewalls, VPNs, routers, and intrusion detection systems 
SN  - 9780735712328
AV  - TK5105.59 .I53 2003
PY  - 2020///
CY  - Indianapolis, Ind.
PB  - New Riders
KW  - Computer networks
KW  - Security measures
ER  -