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  • OO O OO

    K. APBANITH . KOYBA . OYTIO

    TEXNOOIAIKTYN EIKOINNIN

    A 2 KYKOY

    TOMEA HEKTPONIKN

  • OMAA YPAH A K, Hfi Mfi Mfi Y

    EM K , Hfi Mfi, . T Hfi

    M M Y EM O , fi Pfi-A, Efi

    OMAA KPIH B M, T O

    A M , K T E

    A K, Mfi - Mfi, M,

    T

    YNTONITHO

    EIMEEIA EKOH O

    HEKTPONIKH EEEPAIA KEIMENOY M

    IKH EIMEEIA E, fi

    XEIAMO EYOY & POEKTYH BIBIOYYNEH

    M fi E K , fi Ofi Efi B .

    AIAIKO INTITOYTO

    Efi Y HEKTPONIKN,

    . XAPAAMO HM. KANEOOYO (PH.D)

    ( I)

  • OOO

    O fi fi fi .

    fi, fi fi , 2 - fi fi - .

    fi fi fi 1

    . - fi -. , - -. , - , fi , . fi , - fi . fi - . , , fi fi- , fi .

    fi fi fi - fi fi-, , fi - fi .

    - , , . . . fi fi , , . fi .

    , fi - , , fi fi -.

    O

  • KEAAIO 1 APXE IKTYN EIKOINNINfi ............................................................................................................................... 9 ............................................................................................................................................ 10

    1.1 .................................................... 101.2 H ................................................................. 141.3 .............................................................................................. 141.4 ...................................................................................................... 191.5 .................................................................................................................. 21

    1.5.1 ................................................................................................. 211.5.2 ....................................................................................................... 241.5.3 ......................................... 261.5.4 O ............................................................................. 26

    ................................................................................................. 26fi ......................................................................................................... 27

    1.6 ............................................................................................................... 291.7 fi .................................................................................. 311.8 OSI ......................................................................................................................... 35

    1.8.1 OSI ............................................................................................. 37 (Application layer) ..................................................................... 37 (Presentation layer) ............................................................... 37 fi (Session layer) ............................................................................... 37 (Transport layer) ....................................................................... 38 (Network layer) .............................................................................. 38 (Data link layer) ......................................................... 39fi (Physical layer) ................................................................................ 39

    1.9 ............................................... 401.9.1 ................................................................................................................ 401.9.2 ............................................................................................... 411.9.3 LAN WAN ................................................................................................. 42

    1.10 fi .................................................................................................................................. 431.10.1 ....................................................................................................... 431.10.2 O ........................................................................................... 44

    ISO (International Standards Organization) ................................................................ 44ITU (International Telecommunication Union ) ........................................................... 44IETF (Internet Engineering Task Force) ........................................................................ 45IAB (Internet Architecture Board) ................................................................................ 45ETSI (European Telecommunications Standards Institute) ........................................... 45O (fi Ofi ) ........................................................... 46

    1.11 ......................................................................................... 46 ................................................................................................................................. 47 - ......................................................................................................................... 47 ...................................................................................................................................... 50

    KEAAIO 2 EIKOINNIE EOMENNfi ............................................................................................................................... 51 ............................................................................................................................................ 52

    2.1 ............................................. 522.1.1 fi, fi ............ 54

    fi , ..................................................................... 572.2 ........................................................................................................ 58

    O

    4

  • 2.3 ............................................................... 602.3.1 .................................................... 602.3.2 fi ............................................ 61

    2.4 ........................................................................................... 642.4.1 fi ................................................................................................ 65

    Nyquist ( fi) ............................................................... 65 Shannon ( fi) ................................................................... 66

    2.5 .................................................................................................. 672.5.1 fi bit .................................................................................................... 672.5.2 fi fi ....................................................................................... 672.5.3 fi .................................................................................. 68

    ................................................................................................................................. 69 - ......................................................................................................................... 69 ...................................................................................................................................... 70

    KEAAIO 3 MEA METAOHfi .............................................................................................................................. 71 ............................................................................................................................................ 72

    3.1 ..................................................................................................................... 723.1.1 ......................................................................................... 72

    ........................................................................................................ 73Ofi ................................................................................................. 73 O ............................................................................................. 74

    3.1.2 ........................................................................................ 76 ............................................................................... 77 ....................................................................... 77 ........................................................................................... 79

    3.2 ............................................................................................. 803.2.1 ......................................................... 813.2.2 ............................................................................................................ 843.2.3 fi ........................................................................................................................ 863.2.4 ....................................................................................................................... 873.2.5 ................................................................................................................................ 88

    3.3 ........................................................................................................ 903.3.1 ............................................................................................................ 923.3.2 Ofi ...........................................................................