Students will learn the essentials of computer and network security while getting complete coverage of CompTIA's Security+ certification exam as well as coverage of most of the objectives of the (ISC)2 SSCP certification, which focuses on best practices, roles, and responsibilities of security experts. Students will understand security objectives and the role of policy deployment while they learn to defend against network attacks, denial services, spoofing, hijacking; combat viruses, worms, Trojan horses and logic bombs; and much more. Written and edited by leaders in the IT security field, the book explains the fundamentals of communication, infrastructure, and operational security. Details on methods used to defend computer systems and networks and how to prevent attacks are also featured.