TY - BOOK ED - International Council of E-Commerce Consultants. TI - Network defense: security and troubleshooting network operating systems SN - 9781435483583 (pbk.) AV - TK5105.59 .E23 2011 Vol. 4 U1 - 005.8 23 PY - 2011/// CY - Clifton Park, NY PB - Course Technology, Cengage Learning KW - Computer networks KW - Secuity measures KW - Examinations KW - Study guides KW - Telecommunications engineers KW - Certification N1 - Cover title; "Volume 4 of 5 mapping to EC-Council Network Security Administrator certification."; Cards with code for online access attached inside back covers; Includes indexes; v. 1. Fundamentals and protocols -- v. 2. Security policy and threats -- v. 3. Perimeter defense mechanisms -- v. 4. Securing and troubleshooting network operating systems -- v. 5. Security and vulnerability assessment ER -