Named license - Also known as a user-based license, it is tied to a specific individual or account. Only the designated user is authorized to access the software. This type of license is suitable for organizations that require individual user access control and want to track software usage on a per-user basis.
Concurrent license - It allows a specified number of users to access and use the software concurrently or simultaneously. The number of users who can access at the same time is limited in each case. This license category is beneficial for organizations with a large user base that also need to control the maximum concurrent users allowed.
Client Access License (CAL) - It provides client devices or users with the right to access specific server software. They are commonly used in server-based environments, such as Microsoft Windows Server, where each client device or user requires a separate CAL to access the server. They can be either per-user or per-device, depending on the licensing model.