Title: CCNA Exploration Network Fundamentals
1CCNA 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????????? ???????? ???????????
11TCP ? 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)
12UDP
13TCP
14??????? ??????
- ?????????? ??????? ?? ?????????, ? ???????????
???????? ?????.
15??????? ??????
- Well Known Ports (?? 0 ?? 1023) ??????????? ??
????????? ?????? (HTTP, POP3/SMTP, Telnet ...). - Registered Ports (?? 1024 ?? 49151) ?? ??????
???????? ??????? ? ??????????. ??? ????? ????? ??
?? ??????? ? ?? ????????? ??????????. - Dynamic or Private Ports (?? 49152 ?? 65535)
????????? ?? ????????? ?? ????????? ?? ????????
????? ?? ????? ???? ????????? ??????????.
16TCP ???????
17TCP ? UDP ???????
18TCP ? UDP ???????
19??????????? ?? ????????? ???????
20TCP ???????? ??????????? ? ??????????
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21TCP- ????????? ??????????
- Source Port Number ??????????-????????
- Destination Port Number ??????????-?????????
- Sequence Number ??????? ????? ?? ??????????
??????? - Acknowledgement Number ??????? ????? ??
????????? ???????
22TCP- ????????? ??????????
- ???????
- 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
23TCP ???????? ???????
- ????? ???? ?????? ?? ????? ?? ?? ?????? 2 ???????
? ????????? ?? ??????? ??????.
24???????????? ?? ??? ????? 3 ??????three-way
handshake
25????????? ?? ??? ?????
26??????????? ?? ????????
27?????????????
28 ??????? ?? ?????? (flow control)
- ?????? ?? ?????????
- ????????? ?? ????????????
29UDP ???????? ??????????? ? ???????
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30UDP
- ??????????, ?? ???? ? ????? ????????? ???????.
- ???? ???????? ????????? ?? ???????? ????
- 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????
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