THE OSI MODEL

PERCOMPERCOM Member Posts: 7 ■□□□□□□□□□
CAN ANYONE TELL ME WHAT LAYER
IS ABOVE THE NETWORK LAYER AND
WHAT LAYER IS BELOW IT?

WAITING..
THANX!! icon_eek.gif
I REMAIN
HE WHO REMAINS TO BE....

Comments

  • viper75viper75 Member Posts: 726 ■■■■□□□□□□
    Layer 2 (Data Layer) is below it.
    Layer 4 (Transport Layer) is above it.

    The OSI Layer is made up of 7 layers. The layers start out in the following order:

    7. Application Layer - Responsible for identifying and establishing the availability of the communication partner and determining if sufficient resources for the communication exist. It also handles synchronizing communication between applications. This layer is closest to the end-user and how user interacts with the software applications. Examples are; (FTP, WWW, Telnet, SMTP, and Search Engines.) [DATA]

    6. Presentation Layer - Provides a variety of coding, decoding, encrypting, decrypting and conversion functions that are applied to the application layer data. These functions ensure that information sent from the application layer of one system will be readable by the application layer of another system. (TIFF, GIF, PICT, ASCII, EBCDIC, MPEG, MIDI, HTML, and Quicktime, data).

    5. Session Layer -Responsible for coordinating communications between systems, which is accomplished by connection establishment, data transfer and connection termination.( PC, SQL, NFS, NetBIOS names, AppleTalk, ASP, X Window, DECnet SCP DATA).

    4. Transport Layer - Manages the flow of data between parties across a network. This layer provides error checks to guarantee error-free data delivery. (TCP, UDP, SPX ,SEGMENT).

    3. Network Layer - Responsible for routing transmissions between computers,(IP, IPX, AppleTalk DDP, DATAGRAM, Routers, and Brouters).

    2. Data Link Layer- Defines the format of data on the network. It handles physical and logical connections to the packet’s (data frame) destination using a network interface. (HDLC, PPP, IEEE 802.2, 802.3, & 802.5, FDDI, ATM, FRAME, NICs, Bridges, and Brouters). [Logical Link Control and Media Access Control Sub-Layers].

    1. Physical layer - Defines the medium itself; like cables Thinnet, Thicknet, UTP, and STP. [BITS, NICs, Hubs, and Repeaters] (Also called the Foundation Layer.)
    CCNP Security - DONE!
    CCNP R&S - In Progress...
    CCIE Security - Future...
  • PERCOMPERCOM Member Posts: 7 ■□□□□□□□□□
    viper75 wrote:
    Layer 2 (Data Layer) is below it.
    Layer 4 (Transport Layer) is above it.

    The OSI Layer is made up of 7 layers. The layers start out in the following order:

    7. Application Layer - Responsible for identifying and establishing the availability of the communication partner and determining if sufficient resources for the communication exist. It also handles synchronizing communication between applications. This layer is closest to the end-user and how user interacts with the software applications. Examples are; (FTP, WWW, Telnet, SMTP, and Search Engines.) [DATA]

    6. Presentation Layer - Provides a variety of coding, decoding, encrypting, decrypting and conversion functions that are applied to the application layer data. These functions ensure that information sent from the application layer of one system will be readable by the application layer of another system. (TIFF, GIF, PICT, ASCII, EBCDIC, MPEG, MIDI, HTML, and Quicktime, data).

    5. Session Layer -Responsible for coordinating communications between systems, which is accomplished by connection establishment, data transfer and connection termination.( PC, SQL, NFS, NetBIOS names, AppleTalk, ASP, X Window, DECnet SCP DATA).

    4. Transport Layer - Manages the flow of data between parties across a network. This layer provides error checks to guarantee error-free data delivery. (TCP, UDP, SPX ,SEGMENT).

    3. Network Layer - Responsible for routing transmissions between computers,(IP, IPX, AppleTalk DDP, DATAGRAM, Routers, and Brouters).

    2. Data Link Layer- Defines the format of data on the network. It handles physical and logical connections to the packet?s (data frame) destination using a network interface. (HDLC, PPP, IEEE 802.2, 802.3, & 802.5, FDDI, ATM, FRAME, NICs, Bridges, and Brouters). [Logical Link Control and Media Access Control Sub-Layers].

    1. Physical layer - Defines the medium itself; like cables Thinnet, Thicknet, UTP, and STP. [BITS, NICs, Hubs, and Repeaters] (Also called the Foundation Layer.)



    INTERESTING...
    VERY INTERESTING..
    THANX!!!
    I REMAIN
    HE WHO REMAINS TO BE....
  • Ricka182Ricka182 Member Posts: 3,359
    nice signature......
    i remain, he who remains to be....
  • 0828608286 Member Posts: 29 ■■□□□□□□□□
    Percom, don't worry too much just go to this site and read. The site has got all you need to know for the Network+ exam and then some!

    http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/introint.htm

    Best of luck icon_wink.gif
  • SartanSartan Inactive Imported Users Posts: 152
    The capslock & broken sentances really have got to go :/
    Network Tech student, actively learning Windows 2000, Linux, Cisco, Cabling & Internet Security.
Sign In or Register to comment.