Defend your network against a wide range of existing and emerging threats. Written by a Certified Information Systems Security Professional with more than 20 years of experience in the field, Network Security: A Beginner's Guide, Third Edition is fully updated to include thelatest and most effective security strategies. You'll learn about the four basic types of attacks, how hackers exploit them, and how to implement information security services to protect information and systems. Perimeter, monitoring, and encryption technologies arediscussed in detail. The book explains how to create and deploy an effective security policy, manage and assess risk, and perform audits. Information security best practices and standards, including ISO/IEC 27002, arecovered in this practical resource.;pt. I. Information security basics. ; What is information security? ; Types of attacks ; Hacker techniques ; Information security services -- pt. II. Groundwork. ; Policy ; Managing risk ; Information security process ; Information security best practices -- pt. III. Network security technology. ; Perimeter technology ; Monitoring technology ; Encryption technology ; Glossary ; Index.