Introduction
簡介
Congratulations on your new role as a junior network engineer! As you step into this position, you face a big challenge: the company’s network has no useful documentation. Before you can do any work on enhancing the network’s performance, you must investigate the details of its routing. Are you ready to dive into the network, learn its routing mechanisms and begin the important task of documenting it?
恭喜你就任新的資淺網路工程師職位！在接下這個職位之際，你面臨一項重大挑戰：公司的網路沒有可用的文件紀錄。在著手改善網路效能之前，你必須先調查其路由的細節。你準備好深入了解這個網路、學習它的路由機制，並開始進行文件記錄這項重要任務了嗎？
You realize the following challenges are ahead of you:
你意識到以下挑戰正等著你：
- Understanding complex routing configurations.理解複雜的路由設定。
- Learning the use of various routing protocols such as Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (EIGRP), and static routes.學習使用各種路由通訊協定，例如開放最短路徑優先（OSPF）、增強型內部閘道路由通訊協定（EIGRP），以及靜態路由。
- Recognizing diverse router types across the network, including both physical and virtual routers.辨識網路中各種不同類型的路由器，包括實體與虛擬路由器。
- Addressing scalability and future growth challenges within the existing network infrastructure.解決現有網路基礎架構中的可擴充性與未來成長挑戰。
The figure displays multiple end devices, switches, and routers interconnected. How is the route through this network determined for each packet?
這張圖顯示多台終端裝置、交換器與路由器互相連接。每個封包通過此網路的路徑是如何決定的？
As a network engineer, you must be familiar with routing to efficiently manage and optimize data flow across your network. Routing helps determine the best path for data to travel, which is crucial for minimizing delays and making the most of your network's capacity. This knowledge enables you to solve connectivity problems, enhance network performance, and maintain strong security. As networks grow and evolve, knowing how to apply routing protocols and configurations becomes key to effectively expanding your infrastructure and smoothly integrating new technologies.
身為網路工程師，你必須熟悉路由，才能有效管理並最佳化網路中的資料流動。路由有助於決定資料傳輸的最佳路徑，這對於降低延遲以及充分運用網路容量至關重要。這項知識能協助你解決連線問題、提升網路效能，並維持強健的安全性。隨著網路不斷成長與演進，了解如何套用路由通訊協定與設定，將成為有效擴充基礎架構並順利整合新技術的關鍵。
In this course, you will learn about:
在本課程中，你將學習到：
- The role of a router and of router components.路由器的角色以及路由器的元件。
- The function of a routing table and what information it contains.路由表的功能及其包含的資訊。
- The types of routes and how forwarding works in routers.路由的類型，以及路由器中轉發的運作方式。
Documenting routing involves detailing data paths, router configurations, and routing protocols. In this figure, you can see three types of routing: Border Gateway Protocol (BGP), Static, and OSPF.
為路由建立文件，涉及詳細記錄資料路徑、路由器設定，以及路由通訊協定。在此圖中，你可以看到三種路由類型：邊界閘道通訊協定（BGP）、靜態路由，以及 OSPF。