Alternating Bit, SDLC, HDLC

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

2
???? ????????

• ????? ?? ????????? ????? OpNet, ???? ??????
  
• ????,????? ?????? ?????????.

• ????? ?????? ??????????? ??????? ?- OpNet .

• ????? ????????? ???? ??????????? ???????, ???
  
• ??? ??????? ????????.

3
?? ?? OpNet ?

• Optimized Network Engineering Tools

• ??? ???????? ??????, ??? ????? ????? ?????????
  ???, ??????, ????? ?????? ??????? ??
  ??????.

• ?????? ???? ?????? ?? ???????? ???????? ???
  ????, ??? ?? ??????? ?? ?????? ???????.

• ????????? ????? ???? ????????? ????? ????, ?????
  ?? ???????.

• ???? ???? ?? ??????? ???? ?? ????? ????.

4
(????) OpNet

• ????? ?????? ?-OpNet ?????? ????? ???????

• ??? ??????(process) ???? ?????? ?????.???
  ?????? ????? ??????? ?????? ?????.

• ??? ????? ??????? ??????? ??????? ???? ??????
  ??? ?????? ????? ???????? ?"? OpNet ???? ?????
  ????? .

• ??? ???? ???? ???? ?? ?????? ?????? ?????
  ?????? ????? ?????.

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5
Alternating Bit Protocol
?? ???? ?????

• ????? ????? ???? ??????,????? ?? ??? ???? b
  ,?????? ?? ??????.
• ???? ???? ????????

1. ???? ??? Time-Out , ?????? ????? ??? ??? ??
???? ??? ???? b .
2. ????? ???? ????? Ack , ?? ?? ??? ???? b ????
????? ???? ???? ????,?? ????? ???
?????? ????? ????.
3. ????? ???? ????? Ack , ???? ??? ????? b ???
???? ???? ???? ????,????? ??? ??????
?????? ?????? ????, ?? ??? ???? 1-b.
???? ????? ??? ??? ?????? ??? ??? ????? ?-
master ????? ?? ????? ??????
???????,???? ????? ?- slave ???? ????? ????? ??.
6
???? ????
7
???? ??????

• ??? ???? ?? ????? ?????? ?????? P2P .
• ??????? ???????? ????? ?????? ????? sink .
• ?????source ???? ?? ??????? ?????? .

8
???? ?????? (process)

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

9
??? ?????

• ???? ????? ?? ??????????? ???????.
• ???? ?????? ?? ????????? OpNet ????? ??????
  ????.
• ????? ?? ????? ????????? Alternating Bit?-
  OpNet
• (????? ????? ?????).

• ????? ????????? Alternating Bit ???? ????,??????
  
• ????????? ????? ????.(3 ??????)
• ????? ????????? SDLC , ?????? ?????????.(2
  ??????)
• ????? ????????? HDLC ?????? ?????????.(2 ??????)
• ???? ???? ?????,????? ????? ??? ????????.(????)

10
???... ?????? ???????!!