1. 1 2. ISDN ISDN ISDN ISDN 2 3. 1 2 2A 3 3 4. 3A 4 4A 1 1 2 5 4 3 5 2 3 ISDN ADSL 1 ISDN 4 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 5 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 6 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 7 8. (L13) ISDN 4A 1 6 1 6(S301) 6 (s302)(s303) 1 6(s304) (s305) 6(s306) 6 1 s302 1 8 9. 9 10. 1. 2. 1 ISDN ADSL 3. 4. 3 10 11. 5. 3 6. 3 ISDN ADSL 11 12. 12 13. 1 13 14. 2 1 2 2A14 3 15. 3 1 2 3A15 3 16. 4 1 6 4A 16 17. (57) 18. (2) 1 1020304050 2 19. (3) 3 1020304050 4 20. (4) 5 6 10 20 21. (5) 22. (6) 23. 7 8 3 4 5 6 2 6 ID10 1 9 ID 6. ID 7. 8. 9. 10. 1. 2. 3. 4. 5. 24. AAAAABBAABCCAADDAA AAAAACBBAABDCCAACDDAADCCCCCAAAAABBAABCCCCCDDAAD 25. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. . 26. 1. 1)(Sever)(Terminal) *1 Terminal PCPDA Mobile *2 1 2WebServer 3Server 4 5 PB6WebServer 7Server 8 PB662) *1 2 : ( 1) 1 1~() 4 () 2 1 ( WebServer 3) 27. 3 (ID) 4 4 WebServer 7 5 6 8 7 8 2 WebServer 3Server 4WebServer 7 8(PB6 1 ID) IDID(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 WebServer1Server 43PB68WebServer 7IDID(Internet)ID (Internet) (Internet)( )2. 1) : PCPDF() :() SNN 2) PC Terminal (PCPDF) URL 3. 1): 2): 29. 1) 2) *1 ~~ URL ( NTT DoCoMo ) ) (ID)= NetworkSecuritySystem 30. ID 1 ADSL 2 ID ID 3 ID 4 5 * 1996 1 1995 47 2001 31. PCSWSWCATVADSLADSL * 1996 1 1995 47 2001