I have admit that I am complete noob on all of this. I am trying to learn HTML5, Javascript, CSS, JQuery, etc.

Does the JQuery library reside in the browser such that it executes the underlying JS from the library? Or is the JQ library code included in my server-side code when I publish? It sure makes more sense to me that it be only on the browser side to reduce the bandwidth.

Sorry for the (probably ) stupid question but I just cannot seem to find an answer with all my searches.