شرح osi layer

Upload: hamzairaquihoussaini

Post on 10-Oct-2015

24 views

Category:

Documents


1 download

TRANSCRIPT

  • reyaL ISO

    )noitcennocretnI metsyS nepO(

    .

    . .

    ) noitazinagrO sdradnatS lanoitanretnI )OSI (

    PI/PCT ANS tneCED

    ) (

    ) noitcennocretnI metsyS nepO(

    4891

    .

    . .

    )reyaL ISO(

    OSI :

    ecruos(( ataD

    )reyal 7( noitanitseD((

  • *

    ledom ISO

    noitacilppA .7

    noitatneserP .6

    noisseS .5

    tropsnarT .4

    krowteN .3

    kniL ataD .2

    lacisyhP .1

    :

    noitaluspacnE

    ISO

  • noitaluspacnE-eD

    :)noitacilppA( : 7 *

    )noitacilppA(

    :

    tfosorciM sliamE : PTMS

    kooltuO

    sliamE : 3POP

    resworB : PTTH

    : PMNS

    )daolnwoD( : PTF

    . ISO

    .

    .

    , PCHD , PMNS , SND, PTTH, tenleT

    3POP , PTMS , PTTH , PTF

  • : )noitatneserP( : 6 *

    :

    : gnidoC ataD

    edoC iicsA

    gnidoceD ataD

    stiB : noisserpmoC ataD

    ytiruceS : noitpyrcnE ataD

    .

    .

    : 6

    warDkciuQ TCIP *

    . CAM

    . ) ( FFIT *

    ) (GEPJ *

    .

    6

    :

    . : ) IDIM *)

    : ) (GEPM *

    . DC

    emiTkciuQ *

    . CAM

  • : )noisseS( : 5 *

    lortnoC golaiD

    :

    : xelpuD flaH

    : xelpuD lluF

    .

    .

    :

    . wodniw-x *

    . )PSA( klaTelppA *

    .)PCS AND( *

    .SFN )metsyS eliF krowteN( *

  • :)tropsnarT( 4 *

    :

    detneirO noitcennoC

    sselnoitcennoC

    PCT detneirO noitcennoC

    ))locotorP noitacinummoC noissimsnarT

    PCT

    )noitceted rorre( ) lortnoc wolf (

    PDU )noitcerroc rorre(

    PCT PDU

    tiB02 redaeH PCT

    tiB8 redaeH PDU

    PCT

    )tnemgeS ataD( *

    ataD

    secruoseR

    ataD

    .

  • )egdelwonkcA &srebmun ecneuqes( *

    ecruoS

    ataD noitanitseD

    ataD redaeH

    noitanitseD

    : srebmun ecneuqeS

    .

    01 kcA : rebmuN egdelwonkcA

    .01 KCA 9kcA

    )rebmuN troP( *

    : troP

    : trop ecruoS

    : troP noitanitseD

    :-

    )3201 ot 0( :troP nwonK lleW

    PTTH

    .08 troP

    )53556 ot 4201(:

    .

  • PCT

    : 3

    noitanitseD ecruoS :

    ecruoS tnemhsilbatse noitcennoC

    ( gniwodniW noitanitseD

    )

    ekahsdnaH yaW-eerhT :

    . PCT

    elbaileR

    PDU PCT .

    :

    .

    .

    sretemaraP

    :

    troP ecruoS :TROPS

    troP noitanitseD :TROPD

    rebmuN ecneuqeS :QES

    .

    .

    egdelwonkcA :KCA

    .

  • : yaw-eerht

    )ezinorhcnyS( NYS A

    .B

    KCA-NYS B

    .A )egdelwonkcA ezinorhcnyS (

    B KCA A

    .ETATS DEHSILBATSE

    :

    .)dehsiniF ( NIF NYS

    ekahsdnah yaw-eerht

    etats

    . sretemarap

    (

    .)PTF ( )PTTH

    ekahsdnah yaw-eerht

  • .

    .

    * Connectionless UDP ( (User Datagram Protocol

    UDP

    Sequence Number ACK window ))

    .

    * 3 (Network):

    Packets

    Network Layer :

    Addressing : Source IP & Destination IP

    Encapsulation : Data Segment Packets

    Header IP Source IP Destination

    Routing : Source Destination

    Data

    Decapsulation : Destination

    :

    IPv4 & IPv6 & IPX & Apple Talk & DECent

    Header Network Layer: Time to live (TTL) &

    Source IP & Destination IP & Type of Service (TOS) & Protocols

    Time to live (TTL) Packet S Des

    Type of Service (TOS) Purity Data S D

    Protocols TCP or UDP

  • :)kniL-ataD( 2 *

    sserddA CAM emarF stekcaP

    SCF noitanitseD ecruoS

    CRC

    noitanitsed kcehC ycnadnudeR cilcyC ((

    . emarF

    emarF

    emarF

    emarF tenrehtE NAL

    emarF CLDH PPP NAW

    : reyaL kniL ataD

    )CLL( lortnoC knil lacigoL

    emarF stekcaP

    klaTelppA ro XPI ro 6v-4vPI stekcaP

    )CAM( lortnoC sseccA aideM

    ecruoS

    noitanitseD

    emarF

  • :)lacisyhP( 1 *

    .

    : -

    . #

    . #

    . #

    . #

    ) egatloV(

    .

    : . # . # : # # #

    reyaL ISO