國家寬頻實驗網路（National Broadband Experimental Network；簡稱NBEN）之網接中心（Point of Presence with Gigabit capacity；簡稱GigaPOP）及網路骨幹皆已建設完成，其間以ATM網路骨幹連接各大學之GigaPOP，以進行具高頻寬、即時性及服務品質需求之實驗，進而掌握技術發展趨勢及需求成長方向。
本論文在NBEN上研發並實作一以Web為介面之網路管理系統（Web-based Network Management System；簡稱WNMS），讓使用者以人性化且方便的操作介面管理網路，可改善目前NBEN以人工作業方式逐一設定ATM交換機所帶來的不便。它提供一個Web介面（1）讓使用者可以隨時隨地獲得最新網路狀況的資訊，（2）讓使用者透過Web介面線上申請使用網路的頻寬資源，且系統自動回覆處理狀況，（3）自動設定ATM交換機之虛擬路徑或虛擬通道。
為了強化遠程自動遙控各個ATM交換機時所帶來的安全問題，本論文以信賴主機（trusted host）之機制及網路安全技術來克服此一問題。此外，為了能減輕因遠程遙控而在網路中造成額外的負擔，本論文提出使用移動式代理人（mobile agent）的機制。移動式代理人並不會在網路中建立一固定的連線，而是將所需要進行的工作攜帶至遠端的信賴主機執行，而信賴主機上將存在一代理人系統用以執行遠端所交付之任務。因此在使用者眾多的情形下將大幅節省網路頻寬，提高網路品質。使用移動式代理人之攜帶工作的特性，在現有的網路架構下即可發展多樣的網路服務而不需固定的網路連線或特定之通訊協定，讓網路服務之發展更有彈性。

The GigaPOP (Point of Presence with Gigabit capacity) and the ATM-based backbone of the NBEN (National Broadband Experimental Network) have been constructed completely to provide high-bandwidth and real-time services.
A Web-based Network Management System (WNMS) is proposed in the thesis to provide a friendly and conveniently control interface for managing NBEN. The WNMS is able to improve the inconvenience of artificial operations for setting GigaPOPs one by one. Furthermore, a Web interface is designed to provide the following features：(1) acquire the newest network information, (2) online application for an end-to-end connection and tracing the status, and (3) automatic setup of the VP/VC connections.
In order to enhance the security of remote control for ATM switches, a trusted host mechanism with network security technology is proposed in WNMS. Besides, to reduce the load of the network traffic caused by remotely controlling network devices, a mobile agent technology is proposed in the thesis. A mobile agent could bring the works to remote trusted host without permanent connections. There is a mobile agent system on the trusted host that providing an execution environment to execute the works brought by mobile agents. Therefore, the wasted bandwidth is reduced and the quality of network service is enhanced. Using the properties of mobile agents, various network services can be developed conveniently and permanent connections or a specific protocol at current network infrastructure are not necessary.

[1] NGI Initiative, "Next Generation Internet（NGI）Initiative," http://www.ngi. gov/, Jan. 2000.
[2] CANARIE Inc., "CANARIE, " http://www.canarie.ca/, 1999.
[3] G7 Countries, "High-Performance Applications Requesting High-Speed Broadband Networks," http://www.ncsa.uiuc.edu/General/GIBN/, Jan. 1996.
[4] "Asia-Pacific Advanced Network," http://www.apan.net/, May 2000.
[5] Internet2 Working Groups and Initiatives, "Internet2," http://www.internet2. edu/, May. 2000.
[6] MCI WorldCom , "vBNS," http://www.vbns.net/, 1995.
[7] 電信國家型科技計畫, "國家實驗網路," http://www.ntpo.nsc.gov.tw/ project_int/NationNet.html
[8] 中華電信研究所, "Broadband ATM Virtual Path Switch (BEX-VPX)," http://www.chttl.com.tw/pub/major/te87-703.htm, Jul. 1999.
[9] A. C. Weaver, "The Internet and the World Wide Web," IECON 97. 23rd International Conference on Industrial Electronics, Control and Instrumentation, Vol. 4, pp. 1529-40, 1997.
[10] G. J. Kim, Y. S. Kim and H. H. Lee, "A Design of Management System for ATM Switches Using Mobile Agent Concept," IEEE Global Telecommunications Conference, Sydney, Australia, Vol. 3, pp. 1694-8, Nov. 1998.
[11] B. Pagurek, A. Bieszczad and T. White, "Mobile Agents for Network Management," IEEE Communication Surveys, Sep. 1998.
[12] D. E. McDysan and D. L. Spohn, "ATM Theory and Application," McGraw-Hill, 1995.
[13] 呂維毅, "ATM網路新世紀," 和碩科技, pp. 32-3, 121-24, Aug. 1996.
[14] 黃能富, "區域網路與高速網路," 維科出版社, pp. 11-2~6, 11-8~24, Jun. 1998.
[15] J. D. Murray, "Simple Network Management Protocol," O''REILLY, pp. 10-3, 56-60, 105, Apr. 1999.
[16] M. Cheikhrouhou and J. Labetoulle, "When Management Agents Become Autonomous, How to Ensure Their Reliability?," IEEE/IFIP Network Operations and Management Symposium 2000, Hawaii, USA, pp. 949-50, Apr. 2000.
[17] G. Cabri, L. Leonardi, G. Reggiani and F. Zambonelli, "Design and implementation of a programmable coordination architecture for mobile agents," Proceedings of Technology of Object-Oriented Languages and Systems, Nancy, France, pp. 10-9, Jun. 1999.
[18] V. A. Pham and A. Karmouch, "Mobile Software Agents: An Overview," IEEE Communications Magazine, Vol. 36 pp. 26-37, Jul. 1998.
[19] S. Abeck, A. Koppel and J. Seitz, "A management architecture for multi-agent systems," Proceedings of the IEEE Third International Workshop on Systems Management, Newport, Rhode Island, USA, pp. 133-8, Apr. 1998.
[20] A. Karmouch and E. Horlait, "Agent-Based Multimedia Communications on Internet," IEEE Canadian Conference on Electrical and Computer Engineering, Vol. 2, pp. 734-37, May. 1998.
[21] D. Zhang, "Network Management Using Mobile Agent," ICCT''98 International Conference on Communication Technology, Beijing, China, pp. S43-11-1-5, Oct. 1998.
[22] H. Reiser and G. Vogt, "Threat Analysis and Security Architecture of Mobile Agent based Management Systems," IEEE/IFIP Network Operations and Management Symposium 2000, pp. 979-80, Hawaii, Apr. 2000.
[23] S. Alexander, W. A. Arbaugh, A. D. Keromytis and J. M. Smith, "Safety and Security of Programmable Network Infrastructures," IEEE Communications Magazine, Vol. 36, Iss. 10, pp. 84-92, Oct .1998.
[24] J. Tardo and L. Valente, "Mobile agent security and Telescript," IEEE COMPCON ''96: Technologies for the Information Superhighway, Santa Clara, USA, pp. 58-63, Feb. 1996.
[25] M. S. Greenberg and J. C. Byington, "Mobile Agents and Security," IEEE Communications Magazine, Vol. 36, pp. 76-85, Jul. 1998.
[26] M. Zapf, K. Herrmann and K. Geihs, "Decentralized SNMP management with mobile agents," Proceedings of the Sixth IFIP/IEEE International Symposium on Integrated Network Management and Distributed Management for the Networked Millennium, Boston, USA, pp. 623-35, May. 1999.
[27] R. Gray, D. Kotz, S. Nog, D. Rus and G. Cybenko, "Mobile Agents: The Next Generation in Distributed Computing," Proceedings of IEEE Second Aizu International Symposium on Parallel Algorithms/Architecture Synthesis, Aizu-Wakamatsu, Japan, pp. 8-24, Mar. 1997.