TCP——UDP——IP

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发布时间：2019-03-05

本文共 1045 字，大约阅读时间需要 3 分钟。

TCP/IP???????

1. ?????

??????????????????????????IP????????

???????????????

?????????????????????

????????????????????

2. ????

DNS???????????????IP??????????????

3. ??

????????????????IP???????????TCP?UDP????

UDP?????IP???????UDP?????????8???

TCP?????IP???????TCP?????????20???TCP?UDP?????16?????????????????????????

4. TCP/IP???

????????????????????????????

5. TCP/IP??

TCP/IP??????/??????????????????/??????????????????????????????????????????

6. ??????

????

?????SYN????1000?????????

?????SYN-ACK????1001????????????????????

?????ACK????1001?????????

????

????????ACK??????????????????????????ACK??????

?????????????SYN?FIN????????

??????

?????FIN???7?????????

?????ACK???8???????????

?????FIN???9????????????

?????ACK???10?????????

????????

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

?????????TIME_WAIT?????2MSL??????????

TIME_WAIT??????????????

7. TCP?UDP???

????TCP????????????UDP???????????

????UDP??VOIP???????????

???????????UDP?????

8. ???

????????????????????

TCP/IP???????0-65535?????0-1023??HTTP:80?FTP:21?SSH:22??

??????????????TCP/IP???????????????????

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