Few Information Technology skills are in more demand these days than those related to security and few qualifications in this field are more respected than CompTIA's Security+ certification.Security+ Essentials is an eBook designed to provide the knowledge necessary to pass the CompTIA Security+ exam. Topics covered include I.T. infrastructure security, access control, cryptography, intrusion detection, firewall configuration, threat types, public key infrastructure and more.If you are planning to study for the Security+ exam, or simply want to learn more about I.T. Security in general, Security+ Essentials is an ideal source of information.