Data Flow in the OSI Model

how the data flow one system to another system in OSI model?
         The OSI model presents a standard data flow architecture, with protocols specified in such a way that the receiving layer at the destination computer receives exactly the same object as sent by the matching layer at the source computer. Figure A.2 shows the OSI model data flow.
            The sending process passes data to the application layer. The application layer attaches an application header and then passes the frame to the presentation layer.The presentation layer can transform data in various ways, if necessary, such as by translating it and adding a header. It gives the result to the session layer.
The presentation layer is not aware of which portion (if any) of the data received from the application layer is the application header and which portion is actually user data, because that information is irrelevant to the presentation layer's role.
The process of adding headers is repeated from layer to layer until the frame reaches the data link layer. There, in addition to a data-link header, a data-link trailer is added. 
The data-link trailer contains a checksum and padding if needed. This aids in frame synchronization. The frame is passed down to the physical layer, where it is transmitted to the receiving computer.On the receiving computer, the various headers and the data trailer are stripped off one by one as the frame ascends the layers and finally reaches the receiving process.
more information about OSI Model click this link

   OSI Layer Configuration

OSI OSI 7 Layer Model
7. Application Layer - DHCP, DNS, FTP, HTTP, IMAP4, NNTP, POP3, SMTP, SNMP, SSH, TELNET and NTPmore)
6. Presentation layer – SSL, WEP, WPA, Kerberos,
5. Session layer – Logical Ports 21, 22, 23, 80 etc…
4. Transport - TCP, SPX and UDP
3. Network - IPv4, IPV6, IPX, OSPF, ICMP, IGMP and ARPA
2. Data Link- 802.11 (WLAN), Wi-Fi, WiMAX, ATM, Ethernet, Token Ring, Frame Relay, PPTP, L2TP and ISDN-ore)
1. Physical-Hubs, Repeaters, Cables, Optical Fiber, SONET/SDN,Coaxial Cable, Twisted Pair Cable and Connectors (more)

2 comments:

  1. kita juga punya nih jurnal mengenai LAN, silahkan dikunjungi dan dibaca , berikut linknya http://repository.gunadarma.ac.id/bitstream/123456789/5747/1/Dokumen%20Presentasi.pdf semoga bermanfaat yaa :)

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