Types of Web Server

Stateful Stateless
What Remembers client data state(session data, profile image etc) from one request to the next
HTTP requests from users can be sent to any web servers, which
fetch state data from a shared data store.
Disadvantage Everytime request from same Client has to be sent to same server
Adding or removing servers is much more difficult with this approach
Challenging to handle server failures
Advatanges stateless system is simpler, more robust, and scalable.
Web Server