1. 1

2. 2 ISDN ISDN ISDN ISDN 3. 3 1 2 2A 3 4. 4 3A 4 4A 1 1 2 5 4 3 5 2 3 ISDN ADSL 1 ISDN 5. 5 (L11) 2 1 2 ISDN (L12) 2 3(L13) 1 ISDN 2 3(L14) 2A 1 2 3 1 ISDN (S101) 2 (timing token appended)(s102) 1 ISDN (s103) 2(s104) 2 (token) (s105)(s106) 1 2(s106) 2 6. 6 3 3 2 (timingtoken) 1 ISDN 1 3 (s109) 3 1 3 ISDN 2 (token) 2 (s108) 3 2 2 3 1 2 (L21) 2 3(L22) 1 ISDN 3 7. 7 2 (L23) 3A 1 2 3 1 (s201) 2 (S102)(s203) 1 2(s204) 2 1 3(s206) 3 2 (s207) 1 (s208) 3 3 1 s207 2 4 1 6 8. 8 (L13) ISDN 4A 1 6 1 6 (S301) 6 (s302)(s303) 1 6(s304) (s305) 6(s306) 6 1 s302 1 9. 9 10. 10 1. 2. 1 ISDN ADSL 3. 4. 3 11. 11 5. 3 6. 3 ISDN ADSL 12. 12 13. 13 1 14. 14 2 1 2 3 2A 15. 15 1 2 3 3A 3 16. 16 4 6 1 4A 17. (57) 18. (2) 1 2 10 20 30 40 50 10 20 30 40 50 19. (3) 3 4 10 20 30 40 50 10 20 30 40 50 20. (4) 5 6 10 20 10 20 21. (5) 22. (6) 23. 3 4 5 6 9 1. 2. 3. 4. 5. ID 6. ID 7. 8. 9. 10. 8 1 2 6 ID 7 10 24. A A A A A A A A A A B B A A B C C A A C B B A A B D D A A D C C A A C D D A A D C C C C C A A A A A B B A A B C C C C C D D A A D 25. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. . 26. 1. 1)(Sever)(Terminal) *1 Terminal PCPDA Mobile *2 1 2 WebServer 3 Server 4 5 PB6 WebServer 7 Server 8 6 PB6 2) *1 2 : ( 1) 1 1~() 4 () 2 1 ( WebServer 3) 27. 3 (ID) 4 4 WebServer 7 5 6 8 7 8 2 1 WebServer 3 PB6 Server 4 WebServer 7 8 ( ) ID ID ID (Internet) (Internet) (Internet) ( ) (Internet) ( 2) 1 1( WebServer 4) 2 Server 4 3 Server 4 7 4 ( WebServer 7) 28. 5 1 6 1 8 8 7 WebServer 7 8 8 8 3 1 WebServer 3 PB6 Server 4 WebServer 7 8 ID ID ID (Internet) (Internet) ( ) (Internet) 2. 1) : PCPDF() :() SNN 2) PC Terminal (PCPDF) URL 3. 1): 2): 29. 1) 2) *1 ~~ URL ( NTT DoCoMo ) ) (ID)= NetworkSecuritySystem 30. 1 ADSL 2 ID ID 3 ID 4 5 * 1996 1 1995 47 2001 ID 31. ADSL ADSL * 1996 1 1995 47 2001 PC SW SW CATV