[e-mail] E.mail:

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• hosseini_at_um.ac.ir E.mail
• Home page http//hosseini.staffcms.um.ac.ir

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• ????? ?????? TCP

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TCP Transmisson Control Protocol
UDP User Datagram Protocol
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Port
Protocol
Use
21
FTP
File transfer
23
Remote login
Telnet
E-mail
25
SMTP
69
Trivial File Transfer Protocol
TFTP
Finger
Lookup info about a user
79
80
World Wide Web
HTTP
110
POP-3
Remote e-mail access
USENET news
119
NNTP
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???? ????
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?????? ???? ??? ?????? TCP

• TPDU Transport Protocol Data Unit ???? ?????
  ??? ?? ???? ?????? ????TCP

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???? ?????? TCP
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???? ??? ???? TCP

• ???? 16 ????
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???? ??? ???? TCP
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???? ??? ???? TCP
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???? ??? ???? TCP
6 ??? ??????????
?????? Flag
??? URG
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???? ??? ???? TCP
????? ???? 1 ?????????? ????? ???? ????? ?????
?? ???? Acknowledgement Number
????? ???? 1 ?????????? ??? ?????? ??
???? ?????? ? ????????
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???? ??? ???? TCP
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???? ??? ???? TCP
???? ?????? ?????? TCP
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???? ??? ???? TCP
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???? ??? ???? TCP


Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address Source IP Address
Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address Destination IP Address
TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length TCP Segment Length 00000110 00000110 00000110 00000110 00000110 00000110 00000110 00000110 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
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???? ??? ???? TCP