Final answer:
An Assignable license is assigned to one specific machine or device, while a Concurrent license allows multiple users to access and use a software simultaneously with a limited number of licenses.
Step-by-step explanation:
An Assignable license allows a user to install and use a software application on one specific machine or device. It is assigned to that machine or device and cannot be transferred to another one. An Concurrent license allows multiple users to access and use a software application simultaneously with a limited number of licenses.
For example, if a company has 10 concurrent licenses for a software, it means that up to 10 users can access and use the software at the same time. Any additional users will need to wait until a license becomes available.