The world wide web http, Computer Networking

The World  Wide Web HTTP

The Hyper text Transfer Protocols( HTTP) is a protocols  used mainly to  access data on the world  wide  web. HTTP functions as a carbonation of FTP( File  Transfer Protocols) and SMTP ( Simple  Mail Transfer Protocols). HTTP is  implemented in two programs a  client program  and a server program. The  client program  and server program executing on different end systems talk to each other by  exchanging. HTTP message HTTP defines the structure of these  message  and how  the client and server exchange  the messages.

HTTP defines  how web  clients (f or  example browser ) request  web  page from web  servers and  how servers transfer web page to client. In  figure 3.3 when a user requests a web  page (f or  e, g, clicks on a hyperlink) the  browse sends HTTP request messages for the objects  ( an  objects  is simply a file such as an HTML file a JPEG image are GIF image java applet an audio clip and so on in the page to the server.

HTTP uses TCP (Transmission control  protocols) is  its  underlying transport protocol.  Because TCP provides a reliable data transfer services to HTTP. HTTP consists  of two  types  of massage format request  and response.

2035_The World  Wide Web HTTP.jpg

                                                                   figure HTTP request response behavior


The HTTP client first  initiates a TCP connection with  the server. Once the connection is established the browser and the server process access TCP through their socket interface. On  the client  side the socket interface is the door between  the client process and the TCP connection on  the server side it is the door  between  into its  socket interface and receives HTTP response message from  its socket interface. Similarly  the HTTP server receives request message from its  socket interface and sends response message  into its socket interface. Once  the client sends  a message  into its  socket  interface the  message  is out  of the  clients  hands  and is  in the bands of TCP.

HTTP need not worry  about  lost data  or the details of  how TCP recovers from loss  or reordering of data within  the network. That is the job of TCP and the  protocols in the  lower layers  of the protocols stack. It  is important to note  that the server sends  requested files to client without storing any state information about the client. If  a particular client asks for  the same object twice in a period of a few  seconds the server does not  respond by saying that it just  served the object  t the client instead the server resends the objects as it has completely forgotten what  the server  has sent earlier because on HTTP server mantas no information  about  clients HTTP is said  to be  as tasteless protocols.




Posted Date: 3/6/2013 11:51:57 PM | Location : United States

Related Discussions:- The world wide web http, Assignment Help, Ask Question on The world wide web http, Get Answer, Expert's Help, The world wide web http Discussions

Write discussion on The world wide web http
Your posts are moderated
Related Questions
Thicknet Characteristics It Supports transmission rates up to 10 Mbps in Baseband mode Less expensive in comparison of fiber-optic cable however more expensive than ot

Issues with Bridges Connecting Different LANs - Frame format - differences in frame structure, fields used (example Ethernet to Token Ring) - Payload size - size of data en

I''m having trouble with understanding a diagram for my assignment

Q. Explain about Congestion control? Congestion control Open-loop congestion control - prevent congestion before it happens retransmission policy - Ret

Define Routing? The process of determining systematically hoe to forward messages toward the destination nodes based on its address is known as routing.

What is EGP (Exterior Gateway Protocol)? It is the protocol the routers in neighboring autonomous systems use to recognize the set of networks that can be reached within or by

What is Uniform Resource Locator Address of location for accessing Web pages. Clicking on an icon or "hot text" is the most common means of accessing and using a URL. Typing

In OSI 7 layer model, a header, or possibly a trailer, can be added to the data unit at each layerI 7 layer, but we will define a simple virtual packet which contains only 8bit dat

The Network Control Unit (NCU) is a field panel housing electronic modules, terminal blocks, and signal conditioners (pneumatic, linevoltageand electronic) all inside a one enclosu

Q. What do you mean by Addressing? Addressing Require to uniquely and universally identify every device to allow global communication Internet address or IP address is us