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 a book 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.Topic covered include:- Mandatory, Discretionary, Role and Rule Based Access Control- Authentication and Identity Verification- An Overview of IT Security Threats and Attacks- Software Exploitation, Malicious Code and Social Engineering- Identifying Common and Nonessential Services- An Overview of Communications Security- The Basics of Email and Web Security- IT Media Security Basics- Network Security Topologies- Intrusion Detection Systems- Security Baselines and Operating System, Network and Application Hardening- Cryptography Basics- An Overview of Public Key Infrastructures (PKI)