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  • NOTICE : 1869 .
    : 1262 : 1

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    1. 1
      : 4
      : 0
      : 2011-07-20
      : 10
      : 28
      : Jul 2011
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      :
      :

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      Wireless Fidelity ɡ IEEE 802.11

      WLAN ..

      ҡ 54 Mb ps IEEE

      802.11a 802.11b. 802.11n ȡ .





      :: Hot Spots ::



      access point wifi

      ( )

      Notebook PDA Tablet PC.

      32 95 .



      :: ::



      pda ( wifi) ǡ

      adapter USB port PC card slot

      ɡ ɡ



      :: ::



      1- ɡ

      2- ʡ ʡ

      3- . .

      4- 54 ɡ ݡ DSL

      Symbol Technologies.

      5- ɡ ɡ ǡ

      6- ǡ .

      7- reliabililty security



      :: ::



      1.

      2.

      3.

      4.

      5.



      :: ::



      LAN ʡ

      .

      VoIP

      .

      .



      :: ::





      1- Infrastructure mode access point configuration SSID SSID

      .

      access point

      2- Ethernet AD-Hoc Mode cell( )





      :: ::



      Infrastructure mode (privacy) AD-Hoc Mode

      AD-Hoc Mode Infrastructure mode



      :: WIFI (Bluetooth) ::



      bluetooth IEEE802.15.1 wifi 802.11

      wifi bluetooth wifi

      Etherne t bluetooth pda





      = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

      :: ::



      ( ) ( Worldwide Interoperability for Microwave Access )

      . IEEE 802.16 WirelessMAN. WiMAX

      () " router" "switch " .

      WiMAX 2001 WiMAX

      " DSL."



      :: ::



      :-

      1-

      2- .

      3- AES) Advanced Encryption Standard) 3des (Triple DES, where DES is the Data Encryption Standard).

      (.... ... )

      4-



      5-

      6- BPSK, QPSK, 16-QAM, and 64-QAM

      7-



      :: ::





      *

      *

      *

      * (meash network)

      * (monitring systems) (SCADA)



      :: ::



      . .

      . .



      :: ::



      3.5 2.5 . 45 40

      .

      .

      (Digital control applications)

      .

      (phease matrix) .

      .




      ◢   0

    2. 2
      : 1,925
      : 7
      : 2012-08-19
      : 10
      : 10
      : Jul 2011
      :
      :
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      SMS:

      ........

      :
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      ◢   0




      ....
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    1. Abo Al-hassan
      : 4
      : 2013-08-04
    2. 3.
      Ibn-Alforat
      : 7
      : 2013-02-03
    3. (WiFi)
      Ibn-Alforat
      : 2
      : 2011-09-05
    4. Ibn-Alforat
      : 0
      : 2011-08-09
    5. Ibn-Alforat
      : 0
      : 2011-08-09

    , , ,





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