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CCNA Exploration Network Fundamentals

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CCNA Exploration Network Fundamentals Chapter 04 Transport Layer , LCA * * , LCA ... – PowerPoint PPT presentation

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Title: CCNA Exploration Network Fundamentals


1
CCNA Exploration Network Fundamentals
  • Chapter 04
  • Transport Layer

1
2
??????????
  • ?????? ?? ????????????? ????
  • TCP ???????? ??????????? ? ??????????
  • UDP ???????? ??????????? ? ???????

2
3
??????????? ????
3
4
???? ?? ????????????? ????
  • ?????? ???? ? ???????? ??????????.
  • ?????????? ????? ??????? ??????????? ?????
    ???????????? ? ????????? ? ??????????.
  • ?????????? ??????? (? ?????????) ? ??????????
    ????? ????.
  • ??????????? ?? ?????????? ? ????????????-????????.
  • ???????? ????? ???? ??????????.

4
5
(No Transcript)
6
??????? ?????????????
7
????????? ??????? ?? ????????????? ???? ??
  • ???????????? ? ???????????
  • ??????????????? ?? ???????????

8
??????????
9
????????????? ???? ????????? ?? ??????? ?????????
  • Connection-oriented conversations??????????
    ????? ????? ???????????? ? ???????? ???????????
    ?. ????? ? ???????.
  • Reliable delivery???????? ?????????? ?
    ?????????? ??? ?? ??? ?? ???????????.
  • Ordered data reconstruction???????????? ??
    ???????? ???? ?? ?????????? ??????????????
    ?????????.
  • Flow control???????? ???????????? ?????, ?????
    ?? ?? ??????? ??? ???? ????????? (???? ????????,
    ????? ?? ?? ???????? ????????)

10
????????? ???????? ???????????
11
TCP ? UDP
  • Transmission Control Protocol (TCP) ????????
    ???????? ?? ??
  • Web Browsers
  • E-mail
  • File Transfers
  • User Datagram Protocol (UDP) ????, ??
    ?????????? ???????? ?? ??
  • Domain Name System (DNS)
  • Video Streaming
  • Voice over IP (VoIP)

12
UDP
13
TCP
14
??????? ??????
  • ?????????? ??????? ?? ?????????, ? ???????????
    ???????? ?????.

15
??????? ??????
  • Well Known Ports (?? 0 ?? 1023) ??????????? ??
    ????????? ?????? (HTTP, POP3/SMTP, Telnet ...).
  • Registered Ports (?? 1024 ?? 49151) ?? ??????
    ???????? ??????? ? ??????????. ??? ????? ????? ??
    ?? ??????? ? ?? ????????? ??????????.
  • Dynamic or Private Ports (?? 49152 ?? 65535)
    ????????? ?? ????????? ?? ????????? ?? ????????
    ????? ?? ????? ???? ????????? ??????????.

16
TCP ???????
17
TCP ? UDP ???????
18
TCP ? UDP ???????
19
??????????? ?? ????????? ???????
20
TCP ???????? ??????????? ? ??????????
20
21
TCP- ????????? ??????????
  • Source Port Number ??????????-????????
  • Destination Port Number ??????????-?????????
  • Sequence Number ??????? ????? ?? ??????????
    ???????
  • Acknowledgement Number ??????? ????? ??
    ????????? ???????

22
TCP- ????????? ??????????
  • ???????
  • URG - Urgent pointer field significant
  • ACK - Acknowledgement field significant
  • PSH - Push function
  • RST - Reset the connection
  • SYN - Synchronize sequence numbers
  • FIN - No more data from sender

23
TCP ???????? ???????
  • ????? ???? ?????? ?? ????? ?? ?? ?????? 2 ???????
    ? ????????? ?? ??????? ??????.

24
???????????? ?? ??? ????? 3 ??????three-way
handshake
25
????????? ?? ??? ?????
26
??????????? ?? ????????
27
?????????????
28
??????? ?? ?????? (flow control)
  • ?????? ?? ?????????
  • ????????? ?? ????????????

29
UDP ???????? ??????????? ? ???????
29
30
UDP
  • ??????????, ?? ???? ? ????? ????????? ???????.
  • ???? ???????? ????????? ?? ???????? ????
  • Domain Name System (DNS)
  • Simple Network Management Protocol (SNMP)
  • Dynamic Host Configuration Protocol (DHCP)
  • Routing Information Protocol (RIP)
  • Trivial File Transfer Protocol (TFTP)
  • Online games

31
????????? ?????????? ?? ???? ?? ??????????
32
?????? ??????? ??? UDP
33
????
33
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