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Title:

Alternating Bit, SDLC

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Alternating Bit, SDLC. ?? ????????? ????? OpNet. ???? ???? 037426582. ???? ???? 035834498 ... SDLC ????????. ????? ?????? ????? : ... – PowerPoint PPT presentation

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Tags: sdlc | alternating | bit | sdlc

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Transcript and Presenter's Notes

Title: Alternating Bit, SDLC


1
????? ????????? ?? ??????????? Alternating
Bit, SDLC ?? ????????? ????? OpNet ???? ????
037426582 ???? ???? 035834498 ???? ????? ????

2
???? ????????
  • ????? ?? ????????? ????? OpNet, ???? ??????
  • ????,????? ?????? ?????????.
  • ????? ?????? ??????????? ??????? ?- OpNet .
  • ????? ????????? ???? ??????????? ???????, ???
  • ??? ??????? ????????.

3
?? ?? OpNet ?
  • Optimized Network Engineering Tools
  • ??? ???????? ??????, ??? ????? ????? ?????????
    ???, ??????, ????? ?????? ??????? ??
    ??????.
  • ?????? ???? ?????? ?? ???????? ???????? ???
    ????, ??? ?? ??????? ?? ?????? ???????.
  • ????????? ????? ???? ????????? ????? ????, ?????
    ?? ???????.
  • ???? ???? ?? ??????? ???? ?? ????? ????.

4
(????) OpNet
  • ????? ?????? ?-OpNet ?????? ????? ???????
  • ??? ??????(process) ???? ?????? ?????.???
    ?????? ????? ??????? ?????? ?????.
  • ??? ????? ??????? ??????? ??????? ???? ??????
    ??? ?????? ????? ???????? ?"? OpNet ???? ?????
    ????? .
  • ??? ???? ???? ???? ?? ?????? ?????? ?????
    ?????? ????? ?????.

??? ????
??? ?????
??? ??????
5
Data Link Control ?????????
???? ??????????? - ?????? ????? ????? ??
?????? ??? ??? ?? ??? ??"? ??? ???? ?"?
?????? ?? ?????, ????? ?????? ??????. ????? ????
???? - ????? ?????? ?????? ??????? ?????
(???????? ?????). .FIFO - ????? ??????
??????? ?? ????? ?- - ??? ???? ?????? ?????
???? ????? (?? ?? ????? ???? ????).
6
(????)Data Link Control ?????????
??????????? ??????? ???? ????? - ??? ??????
???????? - ??? ????? ???????.
??? ?????? ???????? - ????? ???? ?????? "?????"
- ?????? ???? ??????. - ????? ???? ?????? ?????
???(?? ???? ???? ???? ???). - ????? ??? ????
????? ?? ????? ????? ????? ???.
??? ????? ??????? - ?????? ?????? ??? ???
????. - ????? ????? ?????.
7
Alternating Bit Protocol
??? ???? ???? ??? ????, ??? ???? ?? b.
????? ?????? ?????
  • ????? ????? ???? ??????,????? ?? ?? ??? ????? b
    ,?????? ?? ??????.
  • ???? ???? ????????

1. ???? ??? Time-Out , ?????? ????? ??? ??? ??
???? ??? ???? b .
2. ????? ???? ????? Ack , ?? ?? ??? ???? ????
????? ???? ???? ????,?? ????? ???
?????? ????? ????.
3. ????? ???? ????? Ack , ???? ??? ????? ??????
?????? ??? ???? ???? ???? ????,????? ??? ??????
?? ??? ????? ? 1-b ??????? ?????? ?????? ????, ??
??? ????? ????.
8
Alternating Bit Protocol
????? ?????? ?????
  • ?????? ????? ?????? ?????? ??????
  • ????? ???? ??? Time out ????? ????? Ack ?? ???
    ????? b .
  • ?? ?????? ?????,?????? ?? ??? ????? ?????? ??????
    ??? ??? ?????? ??
  • - ?? ?? ?????? ?? ?????? ?? ??? ????? b ?- 1-b
    ??????? ????? Ack ?? ??? ????? ????.
  • - ???? ?????? ????? Ack ?? ??? ????? b .


9
???? ????
10
???? ??????
  • ??? ???? ?? ????? ?????? ?????? P2P .

11
???? ?????? ?? ????? ??????
  • ??? ????? ????? ???????
  • Init ??? ??????.
  • Wait ???? ?? ?????? ???? ??????.
  • Send ???? ?? ?????? ????.
  • AckWait ??? ?? ???? ????? Ack ?? ?????
    TimeOut .
  • AckChk ???? ?? ?????? ?- Ack ???? ???? ????
    ???? Wait
  • ??? ????? ?????? ????????
  • ??? ?? ???? ?? ??? ?????? ????????, ????? ?????
    ?? ?????, ??? ?? ???? ?????? ????? ?????? ?????
    ??????. ??? ?? ???? ????? ???? ????,???? ?? ??
    ????? ?????? ????? ??????.

12
(No Transcript)
13
???? ?????? ?? ????? ??????
  • Init ??? ??????.
  • Idle ???? ?? ?????? ????,????? ????? Ack
    ??????.
  • Disconnected ????? ?? ????? ????? ??????
    ?????? ???? ?? ??????? ?? ?? ??????
    ????? ?????? ????.

14
SDLC ????????
  • ????? ?????? ?????
  • ????? ?????? ???? (??? ????? ????? ????? ?? ??
    ?????) ????? ???' ??????? ?????? ???? ?? ????
    ????? ?? ??????? ?????? ?????? ?????.
  • ????? ??????? ????? ????? ACK ?? ????? ?????? i
    ???????? ?- ACK ?????? ????? ?? ??????? ??
    ?????? ?- i ???? ?????? ?? ????? ?????? ?- i .

15
???????? SDLC
  • ????? ?????? ?????
  • ????? ????? ?? ??' ?????? ??????? ???????.
  • ???? ????? ??????,???????? ????? ???? ??????? ??
    ??' ?????? ??????? ???????.
  • ??????? ????? ????? ????? ACK ?? ?????? ???????
    ???????.

16
???? ?????? ?? ????? ??????
  • ??? ????? ????? ???????
  • Init ??? ??????.
  • Create_Packets ????? ???? ?? ?????? ??????.
  • Send ???? ?? ?????? ???? ???? ?????.
  • Ack ???? ?? ????? ?- ACK ?????? ?? ?????
    ?????.
  • ??? ????? ?????? ????????
  • ??? ?? ???? ?? ??? ?????? ????????, ????? ?????
    ?? ?????, ??? ?? ???? ?????? ????? ?????? ?????
    ??????. ??? ?? ???? ????? ???? ????,???? ?? ??
    ????? ?????? ????? ??????.

17
(No Transcript)
18
???? ?????? ?? ????? ??????
  • Init ??? ??????.
  • Wait ???? ?? ?????? ????,??? ????? ??? ??????
    ???? ????? Ack ??????.
  • Disconnected ????? ?? ????? ????? ??????
    ?????? ???? ?? ??????? ?? ?? ??????
    ????? ?????? ????.

19
?????? ?????? ???????????
  • ?????? ?? ?????? ??? ????? ?-
  • ??????? ?????? ?? ???.
  • ?????? ???.
  • ???? ??????? ????????.

20
?????? ??????????
21
?????? ?????????? (????)
22
????? ???????
????? ??????? ?????? ?? ??? ???? ?? ?????
???????? A.B ????? ????? ?????? ????? ???? ??
?????? ????? ???? ???? ?????????? SDLC ?????
????? ????? ????? ???? ?? ??' ?????? ???? ???? ??
???? ????? ??? ?????? ???? ???? (??????? ?????
?????) ?????? ??????? ???????? SDLC ???? ????
???????? ??????? ??????? ???????? A.B .
23
????? ??????? (????)
  • ????? ?????? ?? ???
  • ?????? ?? ??? ?????? ???? ?? ???????? ?? ????????
    A.B. ???? ?????? ?????????? ?? ???? ????? ?????
    ????? ????? ????? ??? ??????? ????? ?????? ?????
    ???? ?? ?????? ?? ??? ??? ??? "??" ??? ?????
    ?????? ??????, ????? ??? ????????? SDLC ??????
    ??????? ??? ????? ????? ????? ???? ????? ??????
    ?? ??? ?? ???????? ??? ???? ???? ????????.
  • ?????????? ????? ????? ??????? ?????? ??????
    ??????? ????????? SDLC ??? ????? ????? ??? ??????
    ????????? A.B.
  • ?????? ????? ???? ????????.

24
????? ??????? (????)
  • ????? ???? ???????
  • ????? ???? ??????? ????? ?? ????? ??? ?????? ????
    ?????? ???? ?????? ???? ????????? ????? ????
    ???????????.
  • ???? ???? ??????? ??? ??????????? ?????? ?????
    ???? ?????? ???? ??????? ??? ?????? ???????
    ??????????.

25
?????? ??????? !!!
??????? !!!
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