Access control is a security technique that regulates who or what can view or use resources in a computing environment. It is a fundamental concept in security that minimizes risk to the business or organization
There are two types of access control: physical and logical. Physical access control limits access to campuses, buildings, rooms and physical IT assets. Logical access control limits connections to computer networks, system files and data
Access control systems perform identification authentication and authorization of users and entities by evaluating required login credentials that can include password, personal identification numbers (PINs), bio-metric scans, security tokens or other factors. Multi-factor authentication, which requires two or more authentication factors, is often an important part of layered defense to protect access control systems.