TY  - BOOK
AU  - Sheikh,Ahmed F.
TI  - CompTIA security + certification study guide: network security essentials 
SN  - 9781484267233 (pbk.)
U1  - 005.8 SHE 22
PY  - 2020///
CY  - New York
PB  - Apress
KW  - Computer networks
KW  - Data security
N1  - Includes index
ER  -