3. Extranet
internet protocol
extranet
internal

4. HTML, Hypertext
Transfer Protocol (HTTP) , Simple
Mail Transfer Protocol (SMTP)
intranet
extranet

5. server
digital certificate user
authentication, encryption
(virtual
private network)

7. Extranet
extranet
, extranet
Extranet
extranet

8. extranet
Extranets
extranet
extranet
extranet

9. extranet
extranet
extranet.

10.  Extranet
,

13. 1. Extranet
TCP/IP
2.
3.

14. •
World Wide Web

15. •
Extranet
•

16. •

17. 1.
2.

18. 3.
Private Newsgroup)
4.
Extranet
5.
electronic data interchange (EDI)

19. 1.
2.
3.
4.
web browser

20. 5.

21. 1. VPN Internet
Private
2. Internet
3.
4. intra <---VPN over
Internet ---> intra)
5.

23. Productivity)
3
1.
Efficiency)

24. 2.
Memorability)
3.
Error Reduction)

25. 

27. (Open Internet Technologies)
’

28. Virtual
Private Network)

30. LAN
-

31. LAN
1.
@yourcompany.com

32. -
@

33. 2. Back Office:
Back
Office

34. 3. Off-line Catalog :
CD-Rom
Offline

35. CD-ROM
-

36. 4.
Online Catalog

37. 5.
?

38. 6.
HTML

39. 7.
Enquiry Form:

40. 1.
2.

41. Countrywide
Home Loans
Platinum Lender Access
500

42. Marshall Industries
Marshall
24 Partner Net
Point–of-
sale)

43. 1. US West Facility Check US
West Intranets
Facility Check
,
,
,
,
,
2-3

44. 2. (Other
Plans for the Future) Chrysler
Intranets 7 One
Servers 6,000
,

45. ,
Entergy Intranets Entergy
Net 12,000
,
US West

46. Global Village
Intranets
,