What is the difference between a host and a website?

A website is a collection of related web resources, usually as grouped by some common addressing, ex. www.archive.org.  However, this website could be composed of a number of different hosts, depending on where the information being served comes from. A website can bind information from a number of different sources into one address.  For example a page on www.archive-it.org could have a Research Libraries Group (RLG) logo on it, and the HTML that creates the page could be linking to that image directly on RLG servers. This means that if the page were archived, the reports would show that one document on the Archive-It website was archived from the host rlg.org. (This one document would be the RLG logo).