今日的網際網路非常的成功因為它簡單。網際網路是以盡力，不可靠，且自動化的方式來運作。感謝這樣地簡單，網際網路造就了一個堅固且全域性的公用設施，人們可以隨意地藉以傳送封包不須要事先得到同意。然而，網際網路常須要花長的時間去讓人們在其中設置一個新的通訊協定或服務，因為冗長的通訊協定標準化過程，高價的網路設備升級費用，和麻煩地世界性服務的設置與管理。
為了加速通訊協定的培養和使容易在網路中設置服務，主動式網路社群提出了用主動式結點去建構一個可程式化網路環境名為「膠囊式主動式網路」。主動式結點是一個網路裝置，不但能夠傳遞封包也能在傳遞的同時提供計算的服務。當負載過重時，然而，主動式結點對於所有封包經過此主動式結點的主動式應用程式，會變成一個吞吐量的瓶頸。主動式結點可以加上本論文所提出的「瓶頸主動式結點繞道」來免於造成不良的吞吐量，因為並不是所有的主動式應用程式都須要這已成為瓶頸的主動式結點提供計算服務。此外，主動式結點可以加上「瓶頸主動式結點繞道」來得到其它於本論文中驗證的好處。

Today, the Internet succeeds tremendously because of the simplicity. The Internet works in best-effort, unreliable, and automatic manners. Thanks to the simplicity, the Internet makes a solid global infrastructure whereby people can transmit packets at will without acquiring permission in prior. However, the Internet often takes a long time to accommodate people with a new protocol or service due to the slow protocol standardization progress, the costly upgrade of network devices, and the troublesome deployment and management of world-wide services.

In order to speed up the development of a protocol and facilitate the deployment of a service inside networks, the Active Node is proposed by the Active Network community to construct a programmable network environment named Capsule-based Active Network. The Active Node is a network device capable of forwarding packets and giving them the computation service in the meantime. When getting overloaded, however, the Active Node becomes a throughput bottleneck to all Active Applications whose packets traverse the Active Node. The Active Node can enable the Bottleneck Active Node Detouring proposed in this thesis to free Active Applications from the penalty of poor throughput because not all Active Applications need the computation service in the bottleneck Active Node. Besides, the Active Node can enable the Bottleneck Active Node Detouring to give Active Applications other benefits identified in this thesis.

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