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TCP/IP????Novell NetWare??. ??????IP?????IP???IPX?????IPX??. ??????. ???????????????????Internet Control Message Protocol. ??????. Transmission Control Protocol (TCP), ?RFC793???,??????:??????????????????. ??????????. ??????????,TCP?????????????TCP?????????,TCP?????????????????????????
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1. ????覧TCP/IP????Novell NetWare?? ???<ygh@dlut.edu.cn>
??????????
2. TCP/IP????Novell NetWare?? ??????
IP?????
IP???
IPX?????
IPX??
3. ?????? ??????
???????
??????
Internet Control Message Protocol
4. ?????? Transmission Control Protocol (TCP), ?RFC793???,??????:
????
????
????
????
??
5. ??????覧???? ??????????,TCP?????????????TCP?????????,TCP??????????????????????????????????????TCP??TCP??,???????????,?????????????????????
??????????socket???TCP??;TCP?????socket??????
?????IP??/????????????????????;??socket??/??????????????????????
6. ??????覧????
7. ??????覧????
8. ??????覧????
9. ??????覧???? ???????????
??????????,?????????????????
?????????????
10. ??????覧??
11. ??????覧??
12. ???????
13. ???????
14. ??????
15. ??????
16. Internet Control Message Protocol
17. Internet Control Message Protocol
18. Internet Control Message Protocol
19. ICMP Destination Unreachable Message Network unreachable
Host unreachable
Can稚 fragment
Protocol unavailable
Port unavaiable
20. ICMP Destination Unreachable Message
21. ICMP Destination Unreachable Message network unreachable覧if router A haven稚 a route to 10.1.2.0/24. A will send an unreachable with network unreachable code to Fred.
host unreachable覧if web is down, router B will not get ARP reply from web. B will send an unreachable with host unreachable code.
22. ICMP Destination Unreachable Message can稚 fragment覧if router A or B needed to fragment packet, but the do not fragment bit was set in the IP header, it would send an unreachable with the can稚 fragment value in the code field.
23. ICMP Destination Unreachable Message protocol unavailable
port unavailable
24. Time Exceeded ICMP Message
25. ICMP Redirect
26. IP????? IP????:?????
IP??
IP????:??????
IP????:??????
27. IP????:????? ?RFC791????IP??,IP??????????????:
????????????????
IP???????????,??????,???????????
???????????,??????????
???????(???)?
28. IP????:????? ????????????????????????,??????????
?????????????????,??????????
??????????????????;?????????????
????????????,????????????????
??????,??????,????????????????
??32???,??????(????????)?
29. IP????:????? IP??
30. IP????:?????
31. IP????:?????
32. IP????:?????
33. IP????:????? ??
???????????
34. IP????:?????
35. IP????:?????
36. IP????:????? ????
???????????????????:
???????????
?????255.0.0.0,????????????
?????255.255.0.0,????????????
?????255.255.255.0,????????????
?????????1?
37. IP????:?????
38. IP?? ??????,???????A,B,C??????????:
IP????????????IP????????
??IP???????????????????????????,????????????????A,B,C????
39. IP?? ?????A,B?C???????
????????????????????????
??????????????????
????????????????????????????
40. IP??
41. IP?? ?????
Network number
Subnet number
Network address
Subnet address
Mask
Default mask
Subnet mask
Host address
IP address
42. ??IP??:????? ??IP???????,???????????:
?IP?????????????
?IP???????????????????AND??
???????????
43. ??IP??:????? ???????
44. ??IP??:?????? ?????????
?????????
?????????
???????1??,????????
45. IP??? ??IP
??????
???????IP??
46. ??IP
47. ??IP
48. ??IP
49. ????IP?? ?????????????
ip address ip-address mask [secondary]
50. ???????IP?? interface serial 0
encapsulation frame-relay
interface serial 0.1 point-to-point
ip address 150.10.1.251 255.255.255.0
frame-relay interface-dlci 44
interface serial 0.2 point-to-point
ip address 150.10.2.251 255.255.255.0
frame-relay interface-dlci 45
51. IPX?????
52. IPX?????
53. IPX?????
54. IPX?????
55. IPX?????
56. IPX??
57. IPX??
58. ??:??B????????
59. ??:??B????????