TY  - BOOK
AU  - Thomas 
TI  - Network security first-step 
T2  - First-step series
SN  - 1587200996 
U1  - 005.8 THO 2004 
PY  - 2004///
CY  - Indianapolis
PB  - Cisco Press
KW  - Computer networks
KW  - Security measures
N1  - Includes index p.433 - 456
ER  -