TY  - BOOK
AU  - Barker,Keith
AU  - Morris,Scott
TI  - CCNA security 640-554 official cert guide
SN  - 9781587204463
AV  - TK5105.59 .B357 2013
KW  - Computer networks
KW  - Security measures
KW  - Examinations
KW  - Study guides
KW  - Problems, exercises, etc
KW  - Telecommunications engineers
KW  - Certification
ER  -