VoIP（Voice over Internet Protocol , VoIP）是將語音信號壓縮編碼後，封裝成IP 封包形式，並透過Internet 傳送封包；視訊會議(Video Conference)是指提供語音和影像雙向即時傳送之服務，VoIP與視訊會議提供比Public Switched Telephone Network (PSTN)更好的服務品質與更低的價格、有善的介面以及方便的通訊系統。但是方便隨之來的安全議題也極需重視。
本研究量測分析視訊會議時的影像以及DDoS攻擊視訊會議之通訊品質狀況，我們使用模糊理論分析系統，使用類神經網路偵測DDoS攻擊並產生報告讓系統管理員做參考。並以ISA Server 防火牆進行防護，期盼在基本且簡易的防火牆網路環境中提供視訊會議通訊影像品質正常運作之參考。
VoIP（Voice over Internet Protocol）,compress and encode the voice and video signals, encapsulates the signals into packets and sends packets over the Internet. Video onference provides two-way real-time voice and video transmission of services. VoIP and Video Conference provides better quality than Public Switched Telephone Network (PSTN) at less cost. There are convenient and user friendly. But convenience usually accompanies security issues. That is what we need to pay much more attentions to.
This study measures and analyzes the images of video conference and few common video communications applications under the DDoS attacks. The image quality impacts during DDoS attacks are measured. We use fuzzy analysis system and neural network detection of DDoS, generate analysis reports for system administrators. We use ISA Server protect the video communications. The results to provide a qualify video conference with add-in a basic firewall security environment.
