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OSI !

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Open Systems Interconnection (OSI) , . , 7 . , , , .

, . , :) (1 0), , . , . , .

OSI , , . ?

 OSI - Open Systems Interconnection

#01: (physical)

OSI (, , ) . , , , .

, , - Ethernet. .

, . , .

, , , ( ).


#02: (data Link)

, . , . , . , . MAC . 48 : 00:16:52:00:1f:03.

. , : (LLC, Logical Link Control) (MAC, Media Access Control).

. ! Ethernet . (1 2) OSI.


#03: (network)

! , , IP . , IP MAC ARP.

, . wiki.merionet.ru, DNS , IP . , /, , .

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, , , , , ,

#04: (transport)

, , . TCP UDP. , . :

  • - , TCP (Transmission Control Protocol)! ;
  • - , , , . , . UDP (User Datagram Protocol) . ? , ;

#05: (session)

. , 100%. , , , , . , :) !

, , , . . ? . , :)


#06 (presentation)

, . JPEG GIF, . ( ).


#07 (application)

, , ! , , , . , ? , HTTPS. . HTTP, FTP SMTP.


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