SIEM

Network Access Control (NAC) is an approach to computer security that attempts to unify endpoint security technology (such as antivirus, host intrusion prevention, and vulnerability assessment), user or system authentication and network security enforcement.

An advanced persistent threat (APT) is a prolonged and targeted cyberattack in which an intruder gains access to a network and remains undetected for an extended period of time. Some APTs are so complex that they require full-time administrators to maintain the compromised systems and software in the targeted network.

An acronym for Identity and Access Management, IAM refers to a framework of policies and technologies for ensuring that the proper people in an enterprise have the appropriate access to technology resources. Also called identity management (IdM), IAM systems fall under the overarching umbrella of IT security.

A vulnerability assessment is the process of defining, identifying, classifying and prioritizing vulnerabilities in computer systems, applications and network infrastructures and providing the organization doing the assessment with the necessary knowledge, awareness and risk background to understand the threats to its environment and react appropriately.

Change control is a systematic approach to managing all changes made to a product or system. The purpose is to ensure that no unnecessary changes are made, that all changes are documented, that services are not unnecessarily disrupted and that resources are used efficiently.