為了減少開發學習內容的時間，許多組織花費了很多的時間去訂定數位學習平台及教材標準以提升學習內容之分享、交換能力以及重用性。在這些組織中，又以ADL (Advanced Distributed Learning)所提出之SCORM (Sharable Content Object Reference Model)最為普遍使用。而SCORM之執行環境是以伺服器端/客戶端(Server/Client) 的主從式架構設計，但對於數位學習系統而言應考量支援大量學習者同時上線學習，在此情境下伺服器的負載量若無法因應，則容易造成教學品質下降，進而影響學習者的學習意願。故本研究規劃將SCORM規格數位學習系統架構於點對點溝通(Peer to Peer,又名同儕溝通)模式上，藉以提高可擴充性(scalability)與服務的品質，以達到學習資源共享互通的目的，並有效地讓伺服器的負載降低，進而可減少建置大型伺服器需求而降低系統建置成本。

To reduce the effort of developing learning contents, many organizations pay a great deal of effort for e-learning standards to facilitate sharing, reusing, interoperating of the learning contents. Among these own, Sharable Content Object Reference Model (SCORM), which is proposed by Advanced Distributed Learning (ADL), is currently the most popular standard. The Run-Time Environment of SCORM is based on Server/Client architecture. The learning management system (LMS) usually may need to support a large number of the learners’ access concurrently. In this situation, if the server can not balance the load, the learning quality is dropped and learner’s learning desire is affected. Therefore, this study aims at building the SCORM-compatible LMS based on the Peer to Peer (P2P) architecture. This P2P system can enhance the scalability and the quality of service, achieve efficiently the learning resources sharing, and effectively balance the loading of server to reduce the cost and development of the large-scale server.

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