Papers in PDF format

you have to continue it in a professional manner which is much more work-intensive and difficult than just
coming up with a Web server.
It became obvious that WWW is not enough for an international broadcaster and that an integration of
different value-added services like email, FTP and WAIS was urgently needed to fulfil the needs of the
Deutsche Welle and its audience. A properly defined business model, a guaranteed quality of service level and
a secure access to Internet was as crucial since the service start as statistics. The approach chosen proved
feasible for other institutions and companies starting, sometimes as co-operation partner of GMD, with
Internet and WWW.
7. References
[Baker et al. 94] Baker, T., Brüning, I., Klein, L., Michael Lenz, M. (1994). Starting a Web site: issues of quality control.
Computer Networks and ISDN Systems 26 (Suppl. 2 double issue), 55-61, Elsevier Science B.V., Holland.
[Bogen et al. 94] Bogen, M., Hausen, H.-L., Worst, R. (1994). Handling of QoS Characteristics. Computer Networks and
ISDN Systems 26 (Suppl. 2 double issue) , 107-118, Elsevier Science B.V., Holland.
[Bogen et al. 95] Bogen, M., Hausen, H.-L., Worst, R. (1995). Quality of Service in a Multimedia Environment.
NETWORLD + INTEROP 95, Engineer Conference Notes, Las Vegas.
[Chapman 92] Chapman, D.B. (1992). Network (In)Security Through IP Filtering. Proceedings of the Third USENIX
UNIX Security Symposium, Baltimore.
[Chapman and Zwicky 95] Chapman, D.B., Zwicky, E.D. (1995). Building Internet Firewalls. Sebastopol, CA: O'Reilly &
Associates Inc.
[Cheswick and Bellovin 94] Cheswick, W.R. , Bellovin, S.M. (1994). Firewalls and Internet Security. Addison-Wesley
Professional Computing Series.
[Costales et al. 93] Costales, B., Allman, E., Rickert, N. (1993). sendmail. Sebastopol, CA: O'Reilly & Associates Inc.
[Deutsche Welle 95] Deutsche Welle, 1995. http://www-dw.gmd.de/english/index.html
[Deutsche Welle 96] Deutsche Welle: Internet, 1996. Geschäftsbericht 1994, p25, Berlin/ Köln.
[Eisenblätter et al. 93] Eisenblätter, U., Hommes, F., Pless, E. (1993). Ein Vergleich von kommerziellen Netzwerk-
Management-Systemen. Arbeitspapiere der GMD Nr. 800.
[gekko 96] http://www.gekko.technopark.gmd.de/about_e.html
[GMD 96] GMD, 1996. http://www.gmd.de/
[Liu et al. 94] Liu, C., Peek, J., Jones, R., Buus B. and Nye, A. (1994). Managing Internet Information Services.
Sebastopol, CA: O,Reilly & Associates Inc.
[NCSA 95] NCSA, 1995. http://hoohoo.ncsa.uiuc.edu/docs/Overview.html
[Case et al. 1990] Case, J., Fedor, M., Schoffstall, M., Davin C. (1990). RFC1157 Simple Network Management Protocol
(SNMP).
[SATAN 95] Satan 1995. http://www.ensta.fr/internet/unix/sys_admin/satan.html
Author Information
Manfred Bogen has been active in the area of group communication, X.400 development, and X.400 standardisation since
1983. In 1987 he became head of the VaS group being responsible for the provision of value-added services. He studied
computer science at the University of Bonn and is co-author of two books about X.400 and distributed group
communication. At present, he is the convenor of the TERENA working group on quality management for networking
(WG-QMN) and a member of the TERENA Technical Committee and the Internet Society.
Michael Lenz received his masters degree in informatics (computer science) from the university of Bonn. He is working at
GMD in the Department for Network Engineering since 1993. His major topics are value-added services, security and