INTERNET PROTOCOLS. Microsoft’s Internet Information Server Home Page Figure 3-10 2IT2031 UNIT-3.

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Presentation transcript:

INTERNET PROTOCOLS

Microsoft’s Internet Information Server Home Page Figure IT2031 UNIT-3

3 Internet Protocols ARPANET: Network Control Protocol (NCP) Protocol: collection of network data rules – Includes transmission rules – Computers must use same protocol Proprietary architecture (closed architecture) – Manufacturer creates own protocol Open architecture (Internet core) – Uses common protocol – Four key message-handling rules – Contributed to the Internet’s success

IT2031 UNIT-34 TCP/IP Internet protocols – Transmission Control Protocol (TCP) Controls message, file disassembly into packets before Internet transmission Controls packet reassembly into original formats at destinations – Internet Protocol (IP) Specifies addressing details for each packet Labels packet with origination and destination addresses TCP/IP refers to both protocols – Used today (replaced ARPANET NCP)

IT2031 UNIT-35 Web Page Request and Delivery Protocols Web client computers – Web client software (Web browser software) Sends Web page file requests to other computers (Web servers) Web server computer – Web server software Receives requests from many different Web clients Client/server architecture – Combination: client computers, server computers

IT2031 UNIT-36 Web Page Request and Delivery Protocols (cont’d.) Hypertext Transfer Protocol (HTTP) – Internet Web page file delivery rules Web page request using Web browser – Type of protocol name followed by “//:” before domain name – Uniform Resource Locator (URL) Combination: protocol name, domain name Locate resource (Web page) on another computer (Web server)

IT2031 UNIT-37 Electronic Mail Protocols Electronic mail ( ) – Formatted according to common set of rules – Client/server structure server – Computer devoted to handling – Stores, forwards messages client software – Read and send – Communicates with server software Standardization and rules very important

IT2031 UNIT-38 Electronic Mail Protocols (cont’d.) Two common protocols – Simple Mail Transfer Protocol (SMTP) Specifies mail message format Describes mail administration server Describes mail transmission on the Internet – Post Office Protocol (POP) Sends mail to user’s computer, deletes from server Sends mail to user’s computer, does not delete Asks if new mail arrived

IT2031 UNIT-39 Electronic Mail Protocols (cont’d.) Multipurpose Internet Mail Extensions (MIME) – Set of rules for handling binary files Interactive Mail Access Protocol (IMAP) – Newer protocol Same basic POP functions Includes additional features