Session is transparent from user

Can anyone tell me what is the meaning of "Session is transparent from开发者_开发百科 user.". I want to know that how Session transparent from user.

It means that whatever are the internal details(how the session was built) is hidden from the user but the user can see the session going on.

Here is an example to help you out,

You know how to drive a car but you don't need to know how to built a car to drive it, so the implementation of the car is transparent from you but you still can drive the car without knowing how it is built.