TY  - GEN
AU  - Devargas ,  Mario
TI  - Network security
SN  - 1855542013
U1  - 005.4476 
PY  - 1993///
CY  - England
PB  - NCC Blackwell
KW  - OPERATING SYSTEMS
KW  - COMPUTER SCIENCE
KW  - NETWORKING
ER  -