TheHypertextTransferProtocol,theWeb's()protocol,isattheheartoftheWeb.HTTPisimplementedintwoprograms:a(请作答此空)programandaserverprogram.Theclientprogramandserverprogramexecutingondifferentendsystems,talktoeachotherby()HTTPmessages.HTTPdefineshowWebclientsrequestWebpagesfromserversandhowserverstransferwebpagestoclients.whenauser()awebpage,thebrowsersendshttprequestmessagesfortheobjectsinthepagetotheserver.Theserver()therequestsandrespondswithhttpresponsemessagesthatcontaintheobjects.
A.host B.user C.client D.guest正确答案C
