Whether you are studying for the Cisco IOS Network Security certification exam (Currently referred to as IINS v3) or just want to have a quick reference guide to practical security commands, this book will be useful to keep on hand. This book takes a practical but detailed approach to security controls of IOS devices as well as a functional introduction to the ASA adaptive security appliances. The security countermeasures covered include device protection for routers and switches, identity-aware access control, firewall services, IPS deployment, Layer 2 attack mitigation, and VPN technologies.