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Cisco ASA: All-in-One Firewall, IPS, and VPN Adaptive Security Appliance by Omar Santos, Jazib Frahim - CCIE No. 5459

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Chapter 1. Introduction to Network Security

The cost of reported computer and network security breaches at enterprises, schools, and government organizations has risen dramatically during the last couple of years. Hints and detailed instructions for creating exploits to break into networks and computer systems are becoming more easily available on the Internet, consequently requiring network security professionals to carefully analyze what techniques they deploy to mitigate these risks.

Security threats vary from distributed denial-of-service (DDoS) attacks to viruses, worms, Trojan horses, ...

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