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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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