Differences between cookies and sessions?

Question

I am training in web developement and am learning about JSP & Servlets. I have some knowledge of HttpSession - I have used

Answer 1

Session in Asp.net:

1.Maintains the data accross all over the application.

2.Persists the data if current session is alive. If we need some data to accessible from multiple controllers acitons and views the session is the way to store and retreive data.

3.Sessions are server side files that contains user information. [Sessions are unique identifier that maps them to specific users]

Translating that to Web Servers: The server will store the pertinent information in the session object, and create a session ID which it will send back to the client in a cookie. When the client sends back the cookie, the server can simply look up the session object using the ID. So, if you delete the cookie, the session will be lost.