I m confused with the “Bandwidth Limit” with “Bandwidth”.
What is the difference between them.

Bandwidth is Speed of data transfer while Bandwidth Limit is the total size of data that can be transferred over the period of time.

Let us consider that you have hosted a website.

Now when some one tries to access your web page from any place, the following things happen,
– the request will be send from the user’s machine to server (where the website is hosted)
– the server fetches the data of the web page and sends it to the machine from where the request came.

The amount of data that is send from the server is measured in terms of Bytes. The data transfered for every such request is calculated and summed up. The total size of data that can be transferred over the period of a month is usually controlled by the web hosting provider called as “Bandwidth Limit”.