The relationship between clients and servers is much like the relationship between a warehouse and a customer.
A customer tells the warehouse what they are looking for.  The warehouse then searches for a part number matching that description,
much like when a server returns an ip address matching the url.  The warehouse finds the part and brings it to the customer,
like when a server returns the html page corresponding to the ip address.  The customer notices that additional tools are
required to make the part work, like when an html page has stylesheets and scripts linked to it.  The warehouse finds and
delivers these additional tools to the customer and the transaction is complete.