In early days, we used to have virtual machines (VMs). This virtual machine help us in managing different operating system in the same hardware. It means On same hardware, we can have Windows server and Linux server and so on. We also need to have hyper-v to run this VMs.
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JWT authentication
In web application, Security is essential. User wants to use resources of our system. For that, we need to authenticate user. Authentication means need to check whether user is eligible to use system or not. Generally, we do authentication via username (in form of unique user name or email id) and password. If user is authenticated successfully, then we allow that user to use resources of a system. But what about subsequent requests? If user has been already identified then s/he does not need to provide credentials each time. Once authenticated, for particular period s/he can use system’s resources. In traditional approach, we used to save Username in Session. This session period is configurable it means session is valid for 15 minutes or 20 minutes. This session is stored in server’s memory. After expiry of session, user needs to login again.
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