The Web: the http protocol

http: hypertext transfer protocol

• Web’s application layer protocol

• client/server model

  • client: browser that requests, receives, “displays” Web objects
  • server: Web server sends objects in response to requests

• http1.0: RFC 1945

• http1.1: RFC 2068

PC running

Explorer

Server

running

NCSA Web

server

Mac running

Navigator

http request

http request

http response

http response

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