W5100E01-AVR WIZnet, W5100E01-AVR Datasheet - Page 65

• Manufacturer Part Number: W5100E01-AVR
• Description: Development Boards & Kits - AVR W5100 EVAL BOARD BASED ON AVR
• Manufacturer: WIZnet

Specifications of W5100E01-AVR

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: ATMEGA128
• Core: AVR8
• Interface Type: LAN, RS-232
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 bit

HTTP, which stands for Hyper Text Transfer Protocol, is a protocol used in Internet for transferring between
Web server and client browsers.
Web Server program analyzes method and URI(Uniform Resource Identifier) of HTTP Request message
received from web browser. In case the related URI simply requests for web page, the page will be sent. If it
requests an action such as CGI(Common Gateway Interface), it takes the action and the result is informed in
web page.
<Fig 3.17> shows HTTP message flow between web server and web client. <Table 3-28> shows structure of
HTTP message.
Request of Client(Web Browser)
<Table 3-26: Web Browser’s HTTP Request Operation Procedure >
--> URL Analysis(Transforming Domain Name to IP Address at DNS)
--> Connection to server at the other end
--> Client(Web Browser) requests document wanted from URL
--> Sending Document(Server)/Receiving Document (Client)
--> Displays received document on the browser
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<Fig 3.17: HTTP Message Flow>
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