Today, every business relies on the Internet - and, therefore, every business requires strong network security. Network Security First-Step, Second Edition explains the basics of modern network security in easy language anyone can understand, even those with no previous technical experience. Throughout, consistent features simplify both learning and reference: -Essentials First approach begins each technical discussion with a real-world/first-step overview, organizing complex subjects into small, easy-to-understand elements -Chapter Mini Case Studies, many with simple diagrams that show how network security is typically implemented -Highlighted Keywords with definitions in boxes.