Network security presents both the greatest challenge to companies and the greatest opportunity individuals interested in a career in IT. Basic network security skills are highly sought after, and will continue to be so for the foreseeable future. Any individual embarking on a career in IT security will benefit from a firm understanding of common security threats and the technologies used to counter them. Network Security Foundations assumes no prior knowledge of the subject and provides a solid introduction to the major issues involved, explaining the fundamentals of network security in simple terms with tangible examples.